Introduction: Refractory materials are widely used in metallurgical, chemical, petroleum, machinery manufacturing, silicate, power and other industrial fields, and their application market is very wide.
Refractory material occupies an important position in the development of the industrial sector, but many people are not clear enough about the understanding of refractory materials. Today, Jun Dao (Henan) New Materials Co., Ltd. is a large professional manufacturer of refractory bricks and castables for everyone here. Introduce distinguishing refractory materials according to chemical characteristics.
(1) Acid refractories. Acidic refractories are silica-based refractory materials, mainly silica bricks and zircon bricks. Acidic refractories are resistant to acidic slag erosion.
(2) Neutral refractories. Neutral refractories mainly refer to refractories such as alumina, chromic oxide, silicon carbide, and carbon, such as corundum bricks, high-alumina bricks, silicon carbide bricks, silicon nitride bricks, and carbon bricks. Its characteristics are corrosion resistance to both acidic and alkaline slag.
(3) Basic refractories. Alkaline refractories mainly refer to refractory materials containing magnesium oxide and calcium oxide as main components, including magnesia brick, magnesia-alumina brick, magnesia-chrome brick, and dolomite brick. Basic refractories have strong resistance to alkaline slag.
Relevant note: Businesses should choose according to different needs when purchasing refractory materials, but cooperation should be considered comprehensively. We must conduct field visits to the comprehensive strength of refractory manufacturers, development period, production standards, and creditability. Here, we recommend Jun Dao New Materials. The company has a very good professional refractories production at a very good price for 20 years, and it is highly rated in the industry.
Plate rolling is a process of continuous three-point bending of sheet metal using a plate rolling machine. The equipment puts the sheet material between the upper and lower work rolls when rolling. The upper roller is raised and lowered vertically, and the two lower rollers rotate and move horizontally relative to the axis of the upper roller. When the upper roll descends, the plate is plastically deformed and bent between the upper and lower work rolls. The continuous rotation of the bottom roller drives the steel plate to advance and retreat through the friction between the plate and the roller to complete the coiling.
1. Pre-bending. When the plate is rolled, there is a length at both ends of the plate that does not bend because it does not touch the upper roller. It is called the remaining straight edge. In the process, the minimum force arm at which the plate starts to bend is called the theoretical remaining straight edge. The bending form (symmetrical bending, asymmetrical bending) is related.
2. Centering. The purpose of centering is to make the generatrix of the workpiece parallel to the roller axis to prevent skew.
3. Roll round. Rolling is the main process of product forming, which is divided into two types: one-time feed and multiple feeds. Multiple feeds are commonly used for rolling thick plates. The number of feeds depends on the technological constraints (such as the maximum allowable deformation during cold rolling) and equipment constraints (such as non-slip conditions and power conditions). When the rebound of the cold coil is significant, a certain amount of overcoiling must be added.
4. Straightening round. The purpose of rounding is to make the curvature of the entire circle as uniform as possible to ensure product quality. The general rounding process is divided into three steps:
(1) Load: According to experience or calculation, adjust the work roll to the position of the required maximum correction curvature.
(2) Rounding: Roll the roller 1 to 2 turns under the corrected curvature to make the entire curling rate uniform.
(3) Unloading: gradually unload the load, so that the workpiece is rolled several times under the gradually reduced correction load.
Rolling Machine,Three-Roller Bending Machine,Four-Roller Bending Machine,Roll Forming Machine
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