Graphite Crucible

Grate crucibles play a vital role in various industries, including metallurgy, foundries, jewelry manufacturing, and more. These crucibles are essential for melting, casting, and refining metals at high temperatures.

Classification of Grate Crucibles: Crucibles can be categorized into three groups: grate crucibles, clay crucibles, and metal crucibles. YIDA as a lesding Leading Supplier in China, specializes in manufacturing two types of grate crucibles: machined grate crucibles and grate clay crucibles.

Due to variations in performance, applications, and environmental conditions, the raw materials, production methods, technologies, and product specifications also differ. Natural crystalhite serves as the primary raw material for grate crucibles, allowing them to retain the sical and chemical properties of natural grate. These crucibles exhibit exnt thermal conductivity and high-temperature resistance. They have a low coefficient of thermal expansion during high-temperature applications and possess anti-strain properties in sudden cold and hot environments. Moreover, grate crucibles demonstrate remarkable chemical stability in acidic and alkaronments, showcasing strong corrosion resistance. With a wide range of sizes available, grate crucibles are not limited by production scale, quantity, or smelting materials. They can be manufactured in any size and quantity while ensuring the purity of the smelting materials. As a result of their superior properties, grate crucibles find extensive use in metallurgy, foundry, machinery, chemical, and other industrial sectors for smelting alloy tool steels, non-ferrous metals, and their alloys. They offer significant technical and economic benefits.

Machined grate crucibles

Machined grate crucibles, also known as high-purity grate crucibles, are primarily machined using high-purity and high-density grate materials, such as molded grate material and isostatic grate material. These crucibles are tailored to customers' specifications. Depending on the materials being melted, machined grate crucibles can be further classified into steel melting crucibles, copper melting crucibles, gold melting crucibles, and analysis crucibles. Additionally, we can produce grate arcs for various applications.Gold Refining Crucibles: Crucibles used for melting gold require raw materials with high purity and density. They should have a bulk density higher than 1.85g/cm3 and a total ash content of less than 50ppm. Gold melting crucibles are typically machined from high-purity, high-density, fine-grained grate. The raw materials for these crucibles include molded grate and isostatic grate.

Uranium Salt Refining Grate Crucibles: These crucibles are large-sized grate crucibles, commonly available in sizes such as Ф400mm × 700mm and Ф500mm × 800mm. The manufacturing process involves selecting high-quality, low-ash petroleum coke and then crushing, milling, blending, kneading, extrusion molding (or shaping), roasting, multiple impregnation, and gratization purification. The primary raw material for these crucibles is isostatic grate material.

Grate clay crucibles

Grate clay crucibles, also known as SiC grate crucibles, consist mainly of silicon carbide (SiC) and grate. They are primarily used for melting copper, aluminum, and other common metals. These crucibles have a relatively low cost and offer a large molten metal capacity. The main molding method for these crucibles is pressure forming.Important guide crucible usage:

Store the crucibles in a dry place to prevent exposure to rain. Before use, slowly bake them up to 500 degrees Celsius.The crucible should be filled based on its capacity, avoiding excessive pressure that could lead to metal cracking due to thermal expansion.When removing the molten metal, it is best to use a spoon and minimize the use of calipers or other tools. If tools are necessary, they should match the shape of the crucible to avoid generating excessive localized stress that could shorten the crucible's lifespan.