Device for preparing hot molten iron and byproducts by using red mud

Abstract

A device for making hot molten iron and a by-product by using red mud comprises: a rotary furnace (1), a flow guide groove (2), and a melting separation furnace (3). The rotary furnace (1) is provided with a smoke outlet (11) and a discharge port (12). The flow guide groove (2) is provided with a feeding port (21) and a slag outlet (22), the feeding port (21) and the discharge port (12) communicating with each other. At least one gas gun (23) is mounted at the head of the flow guide groove (2). A lower side of the flow guide groove (2) is provided with a hot molten iron outlet (24). The hot molten iron outlet (24) is connected to a steel ladle (25) or a pig machine (26). The melting separation furnace (3) is provided with a slag inlet (31) communicating with the slag outlet (22) and is further provided with a cement clinker outlet (32), a silicon, aluminum and titanium alloy outlet (33), and a bottom outlet (34). The device solves the problem that the blast furnace process cannot spit slag, greatly reduces the cost, discharges no solid pollutant, enables the discharged gas to reach the standard, implements low carbon emissions, and is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and in particular relates to a device for preparing hot molten iron and by-products from red mud. Background technique [0002] Red mud, its main components are: 5% to 25% of alumina; 30% to 55% of iron oxide; 5% to 25% of silicon oxide; 3% to 9% of sodium oxide; Titanium, magnesium oxide, calcium oxide, etc. 5% to 10%. It generally contains a large amount of iron oxide, and its appearance is similar to red soil, hence the name; it is the polluting waste slag discharged when the aluminum industry extracts alumina, its pH value is very high, and the pH value of the leachate is 12.1-13.0. In industrial production, on average, 1 to 2 tons of red mud is produced for every ton of alumina produced. As the fourth largest producer of alumina in the world, China discharges tens of millions of tons of red mud every year, while the world produces about 70 million tons of red mud every year. A larg...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a device for producing hot metal and by-products from red mud, which can solve the problem of magnetic separation (including superconducting magnetic separation) in the prior art. , re-election method or flotation method cannot be selected at all, and it can also solve the problem that the blast furnace method cannot "spit out slag", so that toxic and polluted red mud can be recycled to obtain elemental iron; and it can achieve zero discharge of solid pollutants

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