Alumina crucible is a series of products called steel jade - corundum crucible. Corundum crucible has the characteristics of heat resistance, rapid cooling, heat collection and chemical corrosion, but it can not resist acid and alkali. Corundum crucible itself is cylindrical, like a barrel. Although there are many advantages, the aluminum in the corundum crucible is likely to cause Alzheimer's disease. There are many ways to produce corundum crucibles. I will show you how to produce corundum crucibles

(1) dry pressing method

Because of the stroke arrangement and working pressure balance of the four column hydraulic press, when the powder filling amount is different, the relative height of the suppressor is different. Specification not less than 60 μ M and the dust particles in the middle of 60 to 200 mesh can get the actual effect of large random fitness exercise, and lose the excellent working pressure to produce the actual effect. There are three types of presses, hydraulic type and equipment type, which can be semi-active or fully active. The ability of compound porcelain dry pressing to form carbon carbon composite furnace body is limited to pure appearance, the thickness of inner cavity is more than 1mm, the height to diameter shall not exceed 4:1, and the forming method is biaxial or dual.

The working pressure of the press is 200MPa. However, the working pressure increased by the mechanical press will change with the addition of powder, so the tensile strength of the dirt after calcination is likely to be different, thus reflecting the quality of the commodity. Whether the accuracy of the canned volume has a greater response to the accuracy of the relaxation machine manufactured. Therefore, the uniform distribution of powder particles in the whole process of dry pressing is very important for the filling of last. Corundum crucible with loan currency value of 15 to 50 steel jade series products in 1 second

(2) grouting method

When hollow grouting is carried out, when the slurry is sucked to the inner wall of the mold shell to achieve the required thickness, the unnecessary slurry must be poured out. In order to better improve the length of the embryo, too many difficult shallow plasmas should be used. Grouting forming is the forming method of compound porcelain. Generally, water is used as the auxiliary solution material, then the gelling agent and adhesive of emerald jade mullite sagger are added, and the current organic waste gas is fully milled, and then poured into the gypsum mold. Because the gypsum mold is selected, the profit is low, and it is easy to produce large and medium-sized corundum crucible parts with simple appearance. The key of grouting is to prepare compound slurry. Because the gypsum mold digests and absorbs water, the slurry is dry and solid in the abrasive tool.

The above two kinds of corundum crucible forming methods are often the dry pressing method used for grouting forming. The cost of this method is relatively low, but more importantly, the preparation of raw materials themselves, so this should be paid attention to.