In the field of metallurgy, the production history of Silicon carbide crucible used for smelting non-ferrous metals can be traced back to the 1930s. Its complex process includes raw material crushing, batching, hand spinning or roll forming, drying, firing, oiling and moisture-proofing. The ingredients used include graphite, clay, pyrophyllite clinker or high-alumina bauxite clinker, monosilica powder or ferrosilicon powder and water, mixed in a certain proportion. Over time, silicon carbide has been incorporated to enhance thermal conductivity and improve quality. However, this traditional method has high energy consumption, long production cycle, and large loss and deformation in the semi-finished product stage.
In contrast, today’s most advanced crucible forming process is isostatic pressing. This technology uses graphite-silicon carbide crucible, with phenolic resin, tar or asphalt as the binding agent, and graphite and silicon carbide as the main raw materials. The resulting crucible has low porosity, high density, uniform texture and strong corrosion resistance. Despite these advantages, the combustion process releases harmful smoke and dust, causing environmental pollution.
The evolution of Silicon carbide crucible production reflects the industry’s ongoing pursuit of efficiency, quality and environmental responsibility. As technology advances, the focus is on developing methods to minimize energy consumption, shorten production cycles and mitigate environmental impact. Crucible manufacturers are exploring innovative materials and processes to achieve these goals, aiming to strike a balance between tradition and modernity. As demand for non-ferrous metal smelting continues to grow, developments in crucible production will play a vital role in shaping the future of metallurgy.
Post time: Apr-08-2024