Aluminum Silicon Carbide Castables for Copper, Nickel, Lead and Zinc

Aluminum Silicon Carbide Castables are aluminum silicon carbide castables made of high-purity silicon carbide and special-grade bauxite as the main materials, pure calcium aluminate cement and micro powder as binders. The castable has good volume stability, small linear expansion coefficient, high strength, short baking time, stable thermal vibration resistance, high high temperature strength and wear resistance, and can be poured, sprayed and applied. It can be used in waste incinerators, blast furnace bodies, cyclone furnaces, boiling furnaces and boilers and other easily worn parts, and can also be used as high thermal conductivity refractory materials.

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Description

Copper smelting furnace and furnace lining materials

The smelting temperature of non-ferrous metals is lower than that of iron smelting. However, non-ferrous metal oxides such as Cu2O, NiO, ZrO, PbO and SnO2 are highly alkaline in the high-temperature molten state. In addition, matte, yellow slag (arsenic antimony sulfide compounds) and slag are fluid and permeable, so they corrode the furnace lining materials extremely severely. In particular, the corrosion of the night surface and slag line is more serious, so the refractory materials used need to be specially selected. The slag obtained during copper smelting contains a large amount of iron oxide, and sometimes there are particularly corrosive components such as soda slag. Aluminum silicon carbide castables are used for casting chutes.

Nickel smelting blast furnaces use rectangular water-cooled jacket furnaces and round iron shell furnaces. Aluminum silicon carbide castables are used for casting chutes.

The operation of the lead-zinc electric furnace is different from that of the blast furnace. It is mainly based on the mutual reaction method as described above. Soda ash is loaded into the furnace as a flux or desulfurizer, so two liquid phases, crude lead and soda slag, are generated in the furnace. Soda slag is a special product in non-ferrous metal smelting. It is strongly alkaline and has strong corrosiveness to bricks. Aluminum silicon carbide castables are used to cast the chute.

Product Features

The aluminum silicon carbide castable developed by our company has the characteristics of erosion resistance, corrosion resistance and long life, and is widely used in copper, nickel iron, lead-zinc and high-matte nickel chutes.

Performance Table

Physicochemical indicators of aluminum silicon carbide castables for copper, nickel and lead-zinc

project		HX-AT	HX-AT-X Steel Fiber
chemical composition (%) ：≥	Al₂O₃	55	55
chemical composition (%) ：≥	SiC	5	5
Bulk density (g/cm³): ≥	110°C x16h	2.4	2.4
Compressive strength (MPa)： ≥	110°C x16h	45	45
Compressive strength (MPa)： ≥	1350°C x3h	60	60
Flexural strength (MPa)： ≥	110°C x16h	6	6
Flexural strength (MPa)： ≥	1350°C x3h	8	8
Line change rate (%)：	1350°C x3h	-0.5~+0.5	-0.5~+0.5

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