Black Carborundum

Black carborundum with metallic luster, also known as black silicon carbide, uses quartz sand, petroleum coke and high quality silica as the main raw material by smelting in resistance furnace at high temperature. Silicon carbide also exists in nature as a rare mineral, called moissanite. In the contemporary C, N, B and other non-oxide high technology refractory raw materials, silicon carbide is the most widely used and the most economical of these, which also can be called gold steel sand or refractory sand. At present, the silicon carbide produced in China is divided into black silicon carbide (carborundum) and green silicon carbide (carborundum). Both are hexagonal crystals with the specific gravity of 3.20 ~ 3.25 and the micro hardness of 2840 ~ 3320kg/mm².

Product Specification：

The different purpose of silicon carbide (carborundum):

1, Abrasives.

Silicon carbide can be used to manufacture bonded abrasives, coated abrasives and other abrasive for the processing of glass, ceramics, stone, cast iron, some non-ferrous metals such as cemented carbide, titanium alloy, high-speed steel cutters and grinding wheels mainly because of its high hardness, good chemical stability and certain toughness.

2, Refactory and corrosion resistant materials.

Silicon carbide can be used for grinding tools, shed board and saggers in klin which ceramic products are fired, silicon carbide brick for vertical cylinder distillation furnace in zinc smelting industry, aluminum electrolytic cell lining, crucible, small furnace material and other silicon carbide ceramic products mainly because of its high melting point, good chemical inertness and thermal vibration resistance.

3, Chemical applications.

Silicon carbide can be used as purifying agent for steel smelting, deoxidizer for steelmaking and tissue improver for cast iron.This usually USES low-purity silicon carbide to reduce cost. At the same time, it can also be used as raw material for the manufacture of silicon tetrachloride.

4, Electrical applications.

Silicon carbide can be used as heating elements, nonlinear resistance elements and high semiconductor materials, heating elements such as silicon carbon rod (suitable for various electric furnace working at 1100 ~ 1500℃), nonlinear resistance elements, and all kinds of lightning protection valve pieces.

Products Application

The hardness of black carborundum is between brown fused alumina and diamond, the mechanical strength of it is higher than that of brown fused alumina, and it is crisp and sharp. Compared with green carborundum, the price of black carborundum is cheaper. Furthermore, the SiC content of black silicon carbide is about 98.5%, and the toughness of it is higher than that of green silicon carbide. The black silicon carbide is mostly used for processing the materials with low tensile strength, such as glass, ceramics, stone, refractory, cast iron and non-ferrous metals. Mainly used for grinding cast iron and non-metallic materials.

Product Packing：

FAQ：

1. What is the minimum order quantity?

   1 box is ok, which quantity per box show in below forms.

2. What is delivery time?

   It will take 20-30 days include mixing, pressing, curing, testing and packing. The first trial order with OEM brand may 15 days extra.

3. The condition to accept OEM brand?

   No copy, No fake brand, release the authorized letter for original brand.

4. If you could accept sole agent or distributing in one country? What the condition to be an agent?

   It is not reasonable to be a sole agent at the beginning of cooperation, of course we could consider it when business volume increasing stability, you are welcome to be one of our distributor or retailer no matter the trial order quantity.

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