Composite spinel-zirconium refractory material for smelting colored heavy metal

Abstract

The invention discloses a composite spinel-zirconium refractory material for smelting colored heavy metal. The technical scheme is as follows: the material comprises 30-45 parts of 5mm-0mm emery, 10-30 parts of 5mm-0mm magnesia chromite clinker,15-25 parts of 3mm-1mm magnalium spinel clinker, 7-20 parts of 3mm-0mm magnesite clinker, 1-5 parts of chrome green less than or equal to 0.045mm and 2-8 parts of zirconium dioxide less than or equal to 0.045mm by weight part and a bonding agent is aluminium dihydrogen phosphate liquid the adding amount of which is 3-15% of the total weight of the emery, the magnesia chromite clinker, the magnalium spinel clinker, the magnesite clinker, the chrome green and the zirconium dioxide. A hydraulic press is adopted for molding and the composite spinel-zirconium refractory material is sintered by a hyperthermia tunnel kiln. The content of Cr2O3 of the composite spinel-zirconium refractory material is less than 10%, so that the composite spinel-zirconium refractory material not only is environment-friendly, but also has better slag erosion resistance, high-temperature melt washing resistance, metal melt permeation resistance and thermal shock stability performance.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a composite spinel zirconium refractory material used for smelting non-ferrous heavy metals. Background technique [0002] The damage mechanism of refractory materials used for smelting non-ferrous heavy metals (mainly copper, lead, zinc, tin, etc.) is mainly the erosion of fayalite slag, the erosion of high-temperature melt and the structural spalling caused by the penetration of metal melt. Therefore, Refractory materials are required to have good resistance to slag erosion, high temperature melt erosion and metal melt penetration, and should also have sufficient thermal shock stability. [0003] The refractory materials for non-ferrous heavy metal smelting have been developed from the original magnesia bricks and magnesia-alumina bricks to today's magnesia-chrome bricks. Magnesia-chrome bricks have good resistance to slag erosion, but they are resistant to high-temperature ...

AI Technical Summary

Problems solved by technology

[0004] There are also chrome-aluminum and aluminum-chromium-zirconium refractory materials for non-ferrous heavy metal smelting. The main raw materials are corundum and chrome ore. The principle is to form Al 2 o 3 -Cr 2 o 3 Co-solution, although it has good resistance to high-temperature melt erosion, its resistance to non-ferrous heavy metal smelting slag erosion is poor, and it is sintered in a smoke-filled kiln, which has long production cycles, low thermal efficiency, and pollutes the environment

[0005] Someone once tried to apply very good magnesia-carbon bricks in the steelmaking industry to the non-ferrous heavy metal smelting industry, but failed because the oxygen partial pressure in nonferrous smelting is much higher than that in steelmaking, and the oxygen partial pressure in copper smelting converter Po 2 =2.3×10 -7 kPa, oxygen partial pressure Po of steelmaking converter 2 =5.6×10 -15 kPa, indicating that the oxygen pressure in the copper-making converter is 7-8 orders of magnitude larger than that in the steel-making converter. Therefore, it is impossible for magnesia-carbon bricks to be used in the non-ferrous heavy metal smelting industry.