(1) Hardness
In general, the greater the hardness of the stone, the more difficult the processing and the greater the wear on the tool.
(2) Mineral composition and chemical composition
The material components of stone include mineral composition and chemical composition, different mineral components and chemical composition, and different processability. For example, marble rock minerals are mainly calcite and dolomite, and their Mohs hardness is 3 and 3.5-4 respectively. It is lower in hardness than granite and easy to process. The main rock-forming minerals of granite are quartz, feldspar, and plagioclase, which have a Mohs hardness of 6.5-7. Its processability depends to a large extent on the content of quartz and feldspar, the higher the content, the more difficult it is to process. In chemical composition, such as higher SiO2 content, the more difficult the processing.
(3) Structural structure of rock
In general, the grain is more uniform than the uneven stone, the fine grain is higher than the sheet-like polishing quality, and the dense stone has higher gloss than the loose stone. The degree of crystallization of the mineral is good, and the orientation and alignment of the optical axis will greatly improve the gloss after polishing. The cleavage, grain boundaries and initial cracks of the rock are also important factors influencing the processability.
In addition, the selected processing tools and process parameters are a factor that must be considered.
The decorative stone used for building decoration mainly consists of marble and granite. The finished stone block material is processed into a building decorative plate, and the main processes are sawing, grinding and polishing, cutting finished plate, trimming chamfering and slotting. The sawing process is the most critical, which determines the output and quality of the product. In the sawing process, there are the most used diamond saw blades.
According to statistics at home and abroad, about 50% of the world's industrial diamonds are currently used in the manufacture of stone processing tools, mainly stone processing saw blades.
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