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Production Technology Of High Quality Graphite Crucibles

QINGDAO YOSION LABTECH CO., LTD. | Updated: Jul 06, 2017

At present, China's graphite thermal field used in the main material of the graphite crucibles, is crystalline natural graphite. So it maintains the natural physical and chemical properties of the original graphite. That is: with good thermal conductivity and high temperature resistance, in the high temperature process, the thermal expansion coefficient is small, for acute heat, quenching has a certain anti-strain performance. The acid and alkaline solution corrosion resistance is strong, with excellent chemical stability. Therefore, graphite crucibles, because of the above excellent performance, so in metallurgy, casting, machinery, chemical and other industrial sectors, is widely used in alloy tool steel smelting and nonferrous metals and alloys of smelting. And has a better technical and economic effects.

The type of graphite crucibles can be divided into three categories: the first type of copper crucible, its specifications "number", the second category for the copper alloy crucible, special round 100, round 100, Three kinds of steel used crucible, there are 100 number.

Graphite crucibles specifications (size), usually expressed in the order number size, No. 1 crucible has a capacity to melt 1000g brass, the weight of 180g. Graphite crucibles melting in the melting of different metals or alloys when the amount of melting, crucible can be the capacity of the specification number, multiplied by the corresponding metal and alloy coefficient.

Graphite crucibles production of raw materials, can be summarized as three types. One is the crystalline natural graphite, the second is the plastic fire resistance

Clay, and the third is the calcined hard kaolin skeleton clinker. In recent years, began to use high-temperature synthetic materials, such as: silicon carbide, alumina diamond sand and ferrosilicon and other crucible skeleton clinker. This clinker has a significant effect on improving crucible product quality, enhancing crucible density and mechanical strength.

Graphite crucibles molding, there are three methods, compared with the original ancient molding method is hand-molded. The second is the first of the spin molding method is pressure forming method.

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