Recently, it is understood that most of the domestic manufacturers of silicon micro-powder and micro-silica powder confuse the concept of the two, and they are regarded as a product only from the literal meaning. In fact, silicon micropowder and microsilica powder are very different. It is precisely because of the unclear concept of the two that it has caused chaos in China's silicon micropowder and microsilica market, resulting in many trade negotiation errors, micro silicon powder market price. Far below the international market, it also has a large negative impact on the international reputation of China's silicon micropowder and microsilica market.
With the deepening of the understanding of silicon micropowder and microsilica in foreign countries, silicon micropowder and microsilica have been widely used, and their commercial advantages and extensive market space have gradually emerged.
one. Current status of silicon micropowder and microsilica market At present, only a few countries in China, the United States, Germany and other countries have silicon micropowder production capacity. The market of China's silicon micropowder is mainly in China, concentrated in Fengyang, Anhui, Huzhou, Zhejiang, Lianyungang, Jiangsu. In other places, the export volume is relatively small, and it is exported to South Korea and Japan. The largest domestic producers of silicon micropowders include Anhui Ina High-Tech Co., Ltd. and Donghai Silicon Micro-Powder Factory, with monthly output of more than 1,000 tons. The acceleration of the solar industry has prompted the market demand for silicon micropowder to grow rapidly, and the silicon micropowder has been in short supply. According to relevant information, there are more than 170 manufacturers of silicon micropowders for solar photovoltaic converters in China, of which Shanghai accounts for about 40. Therefore, silicon micropowder has great market demand and potential in China.
The market of micro-silica powder is mostly concentrated in foreign countries. The research on micro-silica powder has been carried out for several decades. For the research and comparison system of micro-silica powder, many countries have established corresponding research institutions and established corresponding production plants. In 1983, the use of microsilica concrete in a project to repair the Kinzua Dam stillang pool saved tens of millions of dollars.
Micro-silica powder is also an industrial by-product of extensive in China. Most industrial silicon production can recover 1 ton of micro-silica powder for every 3 tons of industrial silicon. In the past, most enterprises did not pay enough attention to the recovery of micro-silica powder. The micro-silica powder recovered by some large-scale enterprises was just stacked on one side, and no value and benefit were found. Moreover, these recovered micro-silica silicon The majority of the content is not up to standard, domestic companies are affected by their quality, and most dare not buy these products easily. China's micro-silica powder market is still in a disorderly state, and the market has yet to be further developed. Foreign countries have already obtained huge economic benefits in the use of micro-silica powder. For example, Norway's Aiken buys a large amount of micro-silica powder from China at a low price every year. The micro-silica powder of most domestic iron-alloy manufacturers, such as Northwest Ferroalloy, is purchased by Aiken every year. It is sold at home and sold at a high price to domestic buildings. In the fields of cement and fertilizer, the profits are high. The annual sales of micro-silica powder by Aiken is 250,000 tons, which is regarded as the absolute leader in the micro-silicon powder industry. However, there are very few enterprises specializing in micro-silica powder in China. The large-scale ferroalloy enterprises in the northwest region are the ones with large output. The environmental protection equipment meets the standard, and the recovered silicon powder has higher silicon content, while Shanghai Tianzhu Micro Powder Co., Ltd. produces The micro-silica powder has maintained a good export momentum and has become a famous international brand in the industry, which has a certain impact in the current industry.
The domestic micro-silica powder market has not yet been fully developed, so there is still a lot of market space. However, the resources of micro-silica powder are also limited. With the strengthening of environmental protection by the state, the policy of suppressing the excessive development of high-energy-consuming industries, the micro-silica powder, is imposed while the installation of environmentally-friendly dust-removing equipment by ferrosilicon and industrial silicon manufacturers is forcibly regulated. Resources will become more and more abundant. Therefore, in the face of the cancellation of relevant preferential policies, all businesses should actively seek the benefits of the recycled micro-silica market. However, the main reason for the current price of microsilica is to focus on the cost of recycling equipment, power consumption, and the choice of packaging due to its physical characteristics, whether it is encrypted and transportation costs. The in-depth research, development and utilization of micro-silica powder is related to the future development of China's industrial dust recycling environmental protection industry.
In short, while strengthening the understanding of micro-silicon powder recycling, all businesses should also look for business opportunities more actively, and enhance the vitality of the entire micro-silica powder market to increase its temperature.
two. Differences in the production process of silicon micropowder and microsilica powder Silicon micropowder is crushed, ball milled (or vibrated, airflow milled) by natural quartz (SiO2) or fused silica (natural silica is melted and cooled by high temperature SiO2). Micro-powder processed by multiple processes such as flotation, pickling and purification, and high-purity water treatment.
Micro-silica powder is also called silica fume or agglomerated silica fume, and some people call it silicon powder. When ferroalloy is used to smelt ferrosilicon and industrial silicon (metal silicon), a large amount of highly volatile SiO2 and Si gas is produced in the ore furnace, and the gas is quickly oxidized and condensed and precipitated after being discharged. It is a by-product of large-scale industrial smelting. The whole process needs to be recycled by dust-removing environmental protection equipment. Because of its lighter quality, it needs to be encrypted with encryption equipment. The following is a picture of microsilica:
In the actual transaction process, many manufacturers regard silicon micropowder as micro-silica powder, but because of the essential difference between the two, there are often deviations in the transaction process, so that the product indicators provided by the manufacturer and the indicator parameters of the demand side exist. Huge difference.
three. The difference between the appearance of silicon micropowder and microsilica powder is basically easy to distinguish between silicon micropowder and microsilica powder. Silicon micropowder is pure, white and balanced, and it is a non-toxic, tasteless and pollution-free inorganic. Non-metallic materials; most microsilica powders are gray or dark gray depending on the silica raw material, reducing agent or furnace conditions. In the formation process, due to the surface tension in the process of phase transformation, amorphous spherical granules of amorphous phase are formed, and the surface is relatively smooth, and some are agglomerates in which a plurality of spherical particles are bonded together. White micro-silica powder is rare, and there has been no suitable market positioning in the past. Shanghai Tianyi Special Materials Co., Ltd. has introduced white micro-silica powder, which has been successfully applied to compound fertilizer, pesticide (as adsorbent or silicon fertilizer), paint and paint ( As a thickener, anti-settling agent), rubber (as a reinforcing agent), plastic (as a filler), special ceramics, can replace white carbon black, but the amount is relatively limited.
four. The difference in performance and use of silicon micropowder and microsilica powder from silicon micropowder and microsilica powder performance or role in the silicon industry online is so divided: silicon micropowder generally said that it has good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation Excellent performance such as low expansion, stable chemical properties and high hardness. According to its use, silicon micropowder is divided into the following categories: ordinary silicon micropowder, electrical grade silicon micropowder, electronic grade silicon micropowder series, fused silica silicon micropowder, ultrafine quartz silicon micropowder, and nano silicon micropowder. The specific uses of various silicon micropowders are as follows:
Silicon powder, mainly used in epoxy resin castings, potting materials, electrode coatings, metal casting, ceramics, silicone rubber, coatings and other chemical industries. Electrical grade silicon micropowder, mainly used for insulation casting of ordinary electrical components, insulation casting of high voltage electrical appliances, APG process injection materials, epoxy potting materials, high-grade ceramic glazes, etc.
3. Electronic grade silicon micropowder, mainly used for molding materials and packaging materials for integrated circuits and electronic components.
4. The fused silica micropowder and the raw material used for the fused silica micropowder (WG) are fine powders of natural quartz which have been processed by a multi-pass process after being smelted by high temperature and cooled by amorphous SiO2. The product has high purity, small thermal expansion coefficient, low internal stress, high moisture resistance and low radioactivity. It is used in plastic packaging materials for large-scale and very large scale integrated circuits, epoxy castables, potting materials, and other chemical fields.
5. Ultra-fine quartz micro-powder, mainly used in coatings, paints, engineering plastics, adhesives, quino rubber, precision casting advanced ceramics.
6. Nano-SiOx, nano-SiOx as an important member of nano-materials, mainly used in electronic packaging materials, polymer composites, plastics, coatings, rubber, pigments, ceramics, adhesives, glass steel, pharmaceutical carriers, cosmetics and antibacterial materials, etc. It has become a new material for upgrading and upgrading traditional products.
The main role of micro-silica powder is as follows:
1. Used in mortar and mortar: high-rise buildings, seaports, reservoir dams, water conservancy culverts, railway bridges, subways, tunnels, airport runways, sloping roads, and bolting and blasting reinforcement in coal mine roadways.
In the material industry: high-grade high-performance low-cement refractory castables and prefabricated parts, the service life is three times that of ordinary castables, the refractoriness is improved by about 100 °C, the high temperature strength and thermal shock resistance are obviously improved; it has been widely used: coke oven , iron making, steel making, steel rolling, non-ferrous metals, glass, ceramics and power generation; large iron trenches and ladle, permeable bricks, smear repairing materials, etc.; self-flowing refractory casting materials and dry-wet spray application; oxide Combined with silicon carbide products (ceramic kiln furniture, muffle, etc.); high-temperature calcium silicate lightweight insulation material; electric porcelain kiln with corundum mullite push plate. High-temperature wear-resistant materials and products; corundum and ceramic products; Sialon combined products; currently in addition to the common use in cast refractory materials, in fused and sintered refractories have also been widely used. New wall materials and facing materials: 1 polymer mortar for wall insulation, thermal insulation mortar, interface agent.
4. Cement based polymer waterproof material.
5. Lightweight aggregate insulation and energy saving products and products.
6. Interior and exterior wall construction is processed with putty powder.
7. Other uses: Silicate brick raw materials. 2 Production of water glass. 3 used as a reinforcing material for organic compounds. Because its composition is similar to that produced by gas phase method. It can be used as a filler reinforcing material in polymer materials such as rubber, resin, paint, paint, and unsaturated polyester. 4 Used as an anti-caking agent in the fertilizer industry.
Fives. Differences between silicon micropowder and microsilica index From the indicators, there are many similarities and many differences. Specifically, the chemical composition of the silicon micropowder and the microsilica powder is substantially the same, the main component is silica, and the impurities contain sodium oxide, calcium oxide, magnesium oxide, iron oxide, aluminum oxide and the like. However, the silicon content of silicon micropowder is relatively high, basically more than 99%, and the silicon content of microsilica powder is generally 80-92%, more than 94% are very uncommon. In terms of particle size, silicon micropowder is processed from natural quartz and has a relatively large particle size of 200 mesh, 300 mesh, 400 mesh, 500 mesh, 600 mesh, 800 mesh, 1000 mesh, 1250 mesh, 3000 mesh, 5000 mesh, etc. It is a powder state. The micro-silica powder has a fineness of less than 1 μm, more than 80%, and an average particle diameter of 0.1-0.3 μm, which is a gray state.
In actual trade, the price of silicon micropowder is related to the number of meshes. The larger the mesh, the higher the price. The current market price of silicon micropowder is 200 yuan/500 yuan/ton, 325 mesh 600 yuan/ton, 400 mesh 750 yuan/ton. 500 mesh 950 yuan / ton, 600 mesh 1200 yuan / ton, 800 mesh 1500 yuan / ton, 1000 mesh 2200 yuan / ton, 1250 mesh 2600 yuan / ton, 3000 mesh 6200 yuan / ton, 4000 mesh 8400 yuan / ton; The price of micro-silica powder is related to silicon content and moisture and burning degree. Generally, the micro-silicon powder with a silicon content of 85% is about 1700 yuan/ton, and the Tianjin Port FOB price is about 180 US dollars/ton.
From the market point of view, the potential market for micro-silica powder is larger than that of silicon micro-powder, and there is still a lot of room for development in the domestic micro-silica powder market. From the above we can see that silicon micropowder and microsilica powder have essential differences. The different natures determine the difference between the two uses. In the future commercial trade, we must also distinguish the concepts and differences between the two to improve the success rate of trade. .
With the deepening of the understanding of silicon micropowder and microsilica in foreign countries, silicon micropowder and microsilica have been widely used, and their commercial advantages and extensive market space have gradually emerged.
one. Current status of silicon micropowder and microsilica market At present, only a few countries in China, the United States, Germany and other countries have silicon micropowder production capacity. The market of China's silicon micropowder is mainly in China, concentrated in Fengyang, Anhui, Huzhou, Zhejiang, Lianyungang, Jiangsu. In other places, the export volume is relatively small, and it is exported to South Korea and Japan. The largest domestic producers of silicon micropowders include Anhui Ina High-Tech Co., Ltd. and Donghai Silicon Micro-Powder Factory, with monthly output of more than 1,000 tons. The acceleration of the solar industry has prompted the market demand for silicon micropowder to grow rapidly, and the silicon micropowder has been in short supply. According to relevant information, there are more than 170 manufacturers of silicon micropowders for solar photovoltaic converters in China, of which Shanghai accounts for about 40. Therefore, silicon micropowder has great market demand and potential in China.
The market of micro-silica powder is mostly concentrated in foreign countries. The research on micro-silica powder has been carried out for several decades. For the research and comparison system of micro-silica powder, many countries have established corresponding research institutions and established corresponding production plants. In 1983, the use of microsilica concrete in a project to repair the Kinzua Dam stillang pool saved tens of millions of dollars.
Micro-silica powder is also an industrial by-product of extensive in China. Most industrial silicon production can recover 1 ton of micro-silica powder for every 3 tons of industrial silicon. In the past, most enterprises did not pay enough attention to the recovery of micro-silica powder. The micro-silica powder recovered by some large-scale enterprises was just stacked on one side, and no value and benefit were found. Moreover, these recovered micro-silica silicon The majority of the content is not up to standard, domestic companies are affected by their quality, and most dare not buy these products easily. China's micro-silica powder market is still in a disorderly state, and the market has yet to be further developed. Foreign countries have already obtained huge economic benefits in the use of micro-silica powder. For example, Norway's Aiken buys a large amount of micro-silica powder from China at a low price every year. The micro-silica powder of most domestic iron-alloy manufacturers, such as Northwest Ferroalloy, is purchased by Aiken every year. It is sold at home and sold at a high price to domestic buildings. In the fields of cement and fertilizer, the profits are high. The annual sales of micro-silica powder by Aiken is 250,000 tons, which is regarded as the absolute leader in the micro-silicon powder industry. However, there are very few enterprises specializing in micro-silica powder in China. The large-scale ferroalloy enterprises in the northwest region are the ones with large output. The environmental protection equipment meets the standard, and the recovered silicon powder has higher silicon content, while Shanghai Tianzhu Micro Powder Co., Ltd. produces The micro-silica powder has maintained a good export momentum and has become a famous international brand in the industry, which has a certain impact in the current industry.
The domestic micro-silica powder market has not yet been fully developed, so there is still a lot of market space. However, the resources of micro-silica powder are also limited. With the strengthening of environmental protection by the state, the policy of suppressing the excessive development of high-energy-consuming industries, the micro-silica powder, is imposed while the installation of environmentally-friendly dust-removing equipment by ferrosilicon and industrial silicon manufacturers is forcibly regulated. Resources will become more and more abundant. Therefore, in the face of the cancellation of relevant preferential policies, all businesses should actively seek the benefits of the recycled micro-silica market. However, the main reason for the current price of microsilica is to focus on the cost of recycling equipment, power consumption, and the choice of packaging due to its physical characteristics, whether it is encrypted and transportation costs. The in-depth research, development and utilization of micro-silica powder is related to the future development of China's industrial dust recycling environmental protection industry.
In short, while strengthening the understanding of micro-silicon powder recycling, all businesses should also look for business opportunities more actively, and enhance the vitality of the entire micro-silica powder market to increase its temperature.
two. Differences in the production process of silicon micropowder and microsilica powder Silicon micropowder is crushed, ball milled (or vibrated, airflow milled) by natural quartz (SiO2) or fused silica (natural silica is melted and cooled by high temperature SiO2). Micro-powder processed by multiple processes such as flotation, pickling and purification, and high-purity water treatment.
Micro-silica powder is also called silica fume or agglomerated silica fume, and some people call it silicon powder. When ferroalloy is used to smelt ferrosilicon and industrial silicon (metal silicon), a large amount of highly volatile SiO2 and Si gas is produced in the ore furnace, and the gas is quickly oxidized and condensed and precipitated after being discharged. It is a by-product of large-scale industrial smelting. The whole process needs to be recycled by dust-removing environmental protection equipment. Because of its lighter quality, it needs to be encrypted with encryption equipment. The following is a picture of microsilica:
In the actual transaction process, many manufacturers regard silicon micropowder as micro-silica powder, but because of the essential difference between the two, there are often deviations in the transaction process, so that the product indicators provided by the manufacturer and the indicator parameters of the demand side exist. Huge difference.
three. The difference between the appearance of silicon micropowder and microsilica powder is basically easy to distinguish between silicon micropowder and microsilica powder. Silicon micropowder is pure, white and balanced, and it is a non-toxic, tasteless and pollution-free inorganic. Non-metallic materials; most microsilica powders are gray or dark gray depending on the silica raw material, reducing agent or furnace conditions. In the formation process, due to the surface tension in the process of phase transformation, amorphous spherical granules of amorphous phase are formed, and the surface is relatively smooth, and some are agglomerates in which a plurality of spherical particles are bonded together. White micro-silica powder is rare, and there has been no suitable market positioning in the past. Shanghai Tianyi Special Materials Co., Ltd. has introduced white micro-silica powder, which has been successfully applied to compound fertilizer, pesticide (as adsorbent or silicon fertilizer), paint and paint ( As a thickener, anti-settling agent), rubber (as a reinforcing agent), plastic (as a filler), special ceramics, can replace white carbon black, but the amount is relatively limited.
four. The difference in performance and use of silicon micropowder and microsilica powder from silicon micropowder and microsilica powder performance or role in the silicon industry online is so divided: silicon micropowder generally said that it has good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation Excellent performance such as low expansion, stable chemical properties and high hardness. According to its use, silicon micropowder is divided into the following categories: ordinary silicon micropowder, electrical grade silicon micropowder, electronic grade silicon micropowder series, fused silica silicon micropowder, ultrafine quartz silicon micropowder, and nano silicon micropowder. The specific uses of various silicon micropowders are as follows:
Silicon powder, mainly used in epoxy resin castings, potting materials, electrode coatings, metal casting, ceramics, silicone rubber, coatings and other chemical industries. Electrical grade silicon micropowder, mainly used for insulation casting of ordinary electrical components, insulation casting of high voltage electrical appliances, APG process injection materials, epoxy potting materials, high-grade ceramic glazes, etc.
3. Electronic grade silicon micropowder, mainly used for molding materials and packaging materials for integrated circuits and electronic components.
4. The fused silica micropowder and the raw material used for the fused silica micropowder (WG) are fine powders of natural quartz which have been processed by a multi-pass process after being smelted by high temperature and cooled by amorphous SiO2. The product has high purity, small thermal expansion coefficient, low internal stress, high moisture resistance and low radioactivity. It is used in plastic packaging materials for large-scale and very large scale integrated circuits, epoxy castables, potting materials, and other chemical fields.
5. Ultra-fine quartz micro-powder, mainly used in coatings, paints, engineering plastics, adhesives, quino rubber, precision casting advanced ceramics.
6. Nano-SiOx, nano-SiOx as an important member of nano-materials, mainly used in electronic packaging materials, polymer composites, plastics, coatings, rubber, pigments, ceramics, adhesives, glass steel, pharmaceutical carriers, cosmetics and antibacterial materials, etc. It has become a new material for upgrading and upgrading traditional products.
The main role of micro-silica powder is as follows:
1. Used in mortar and mortar: high-rise buildings, seaports, reservoir dams, water conservancy culverts, railway bridges, subways, tunnels, airport runways, sloping roads, and bolting and blasting reinforcement in coal mine roadways.
In the material industry: high-grade high-performance low-cement refractory castables and prefabricated parts, the service life is three times that of ordinary castables, the refractoriness is improved by about 100 °C, the high temperature strength and thermal shock resistance are obviously improved; it has been widely used: coke oven , iron making, steel making, steel rolling, non-ferrous metals, glass, ceramics and power generation; large iron trenches and ladle, permeable bricks, smear repairing materials, etc.; self-flowing refractory casting materials and dry-wet spray application; oxide Combined with silicon carbide products (ceramic kiln furniture, muffle, etc.); high-temperature calcium silicate lightweight insulation material; electric porcelain kiln with corundum mullite push plate. High-temperature wear-resistant materials and products; corundum and ceramic products; Sialon combined products; currently in addition to the common use in cast refractory materials, in fused and sintered refractories have also been widely used. New wall materials and facing materials: 1 polymer mortar for wall insulation, thermal insulation mortar, interface agent.
4. Cement based polymer waterproof material.
5. Lightweight aggregate insulation and energy saving products and products.
6. Interior and exterior wall construction is processed with putty powder.
7. Other uses: Silicate brick raw materials. 2 Production of water glass. 3 used as a reinforcing material for organic compounds. Because its composition is similar to that produced by gas phase method. It can be used as a filler reinforcing material in polymer materials such as rubber, resin, paint, paint, and unsaturated polyester. 4 Used as an anti-caking agent in the fertilizer industry.
Fives. Differences between silicon micropowder and microsilica index From the indicators, there are many similarities and many differences. Specifically, the chemical composition of the silicon micropowder and the microsilica powder is substantially the same, the main component is silica, and the impurities contain sodium oxide, calcium oxide, magnesium oxide, iron oxide, aluminum oxide and the like. However, the silicon content of silicon micropowder is relatively high, basically more than 99%, and the silicon content of microsilica powder is generally 80-92%, more than 94% are very uncommon. In terms of particle size, silicon micropowder is processed from natural quartz and has a relatively large particle size of 200 mesh, 300 mesh, 400 mesh, 500 mesh, 600 mesh, 800 mesh, 1000 mesh, 1250 mesh, 3000 mesh, 5000 mesh, etc. It is a powder state. The micro-silica powder has a fineness of less than 1 μm, more than 80%, and an average particle diameter of 0.1-0.3 μm, which is a gray state.
In actual trade, the price of silicon micropowder is related to the number of meshes. The larger the mesh, the higher the price. The current market price of silicon micropowder is 200 yuan/500 yuan/ton, 325 mesh 600 yuan/ton, 400 mesh 750 yuan/ton. 500 mesh 950 yuan / ton, 600 mesh 1200 yuan / ton, 800 mesh 1500 yuan / ton, 1000 mesh 2200 yuan / ton, 1250 mesh 2600 yuan / ton, 3000 mesh 6200 yuan / ton, 4000 mesh 8400 yuan / ton; The price of micro-silica powder is related to silicon content and moisture and burning degree. Generally, the micro-silicon powder with a silicon content of 85% is about 1700 yuan/ton, and the Tianjin Port FOB price is about 180 US dollars/ton.
From the market point of view, the potential market for micro-silica powder is larger than that of silicon micro-powder, and there is still a lot of room for development in the domestic micro-silica powder market. From the above we can see that silicon micropowder and microsilica powder have essential differences. The different natures determine the difference between the two uses. In the future commercial trade, we must also distinguish the concepts and differences between the two to improve the success rate of trade. .
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