Process for non-slag production of iron, aluminum and titanium by utilizing reduction molten-salt growth method

Abstract

A process for non-slag production of iron, aluminum and titanium by using a reduction molten-salt method comprises the steps: 1) adding ammonium sulfate into a molten-salt reaction tank (3); 2) adding high-temperature molten slag; 3) delivering ammonia gas into a low-temperature waste heat power generator (5); 4) introducing aluminum sulfate, titanyl sulfate, silicon dioxide and calcium sulfate into a first solid-liquid separation device (11); 5) rectifying ammonia water and pumping the ammonia water into a smelting separation furnace cracking pipe (2b); 6) introducing cracked gas into a rotary kiln (1); 7) conveying liquid ammonia into an aluminum sulfate solution tank (14); 8) hydrolyzing aluminum sulfate and titanyl sulfate; and 9) separating aluminum sulfate and titanyl sulfate by using a second solid-liquid separation device (13). The problem is thoroughly solved that the latent heat energy of the high-temperature molten slag cannot be effectively utilized and valuable elements cannot be extracted.

Description

technical field [0001] The invention belongs to the technical field of ferrous metal, nonferrous metal smelting and inorganic salt, and specifically relates to a slag-free production process of iron, aluminum and titanium reduction molten salt method. Background technique [0002] At present, in the iron and steel industry, the high-temperature molten slag after iron extraction is discarded, and its latent heat is wasted or the utilization rate is very low; in the production of titanium dioxide, only titanium is extracted, and the others are all discarded; in the production of electrolytic nickel by hydrometallurgy, only nickel is extracted and others are also discarded. All scrapped; copper metallurgy as well. These traditional production and process methods are no longer suitable for environmental protection requirements. They have not only caused environmental pollution, but also caused a waste of resources, a large amount of heat energy wasted in vain, so that the produ...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a slag-free production process of iron, aluminum, titanium reduction molten salt method, which can completely solve the problem that the latent heat of high-temperature molten slag in the prior art cannot be utilized or cannot be completely Utilization, its own valuable elements cannot be extracted and utilized, as well as problems such as waste residue pollution, resource waste, and low production capacity, to achieve low-cost and high-efficiency conversion of harmful substances into effective resources, and truly realize solid pollution in the entire production process Zero discharge of material, zero discharge of liquid pollution and standard discharge of gas, green and environmental protection

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