Environment-friendly type alumyte integrated smelting technology

Abstract

The invention discloses an environment-protective synthetic smelting method of boehmite-trihydrate diaspore ore with high-silicon, ferric and sulfur content, which is characterized by the following: removing silicon; proceeding Baeyer stripping disposal without consuming Na2O and Al2O3; recycling Na2O .H2O infinitely; separating calcium silicate, alumina, gallium and iron concentrate powder and calcium titanate from beauxite once; improving utilizing rate of resource.

Description

Technical field [0001] The invention provides an environment-friendly new technological solution suitable for comprehensive smelting of monohydric and trihydric bauxite ores with high silicon, iron and sulfur contents. Utilize the technical scheme of the present invention, in the smelting process, desiliconization and Bayer dissolution treatment can realize Na 2 O and Al 2 o 3 "Zero" loss, Na 2 O·H 2 OInfinite recycling, and one-time separation of bauxite with high silicon, iron, and sulfur content into calcium silicate, alumina, gallium, iron concentrate powder, calcium titanate, etc., to achieve efficient synthesis of bauxite resources Development and utilization, no waste tailings, so that the utilization rate of resources is fully improved. Background technique [0002] At present, there are mainly two basic and practical methods for industrial smelting of bauxite at home and abroad, namely the Bayer method and the sintering method, of which the Bayer method is the ...

AI Technical Summary

Problems solved by technology

But this only removes the soluble kaolinite in bauxite, but cannot remove the insoluble quartz stone in bauxite, SiO 2 The removal rate is low

Secondly, since the mother liquor contains Na 2 O·Al 2 o 3 , SiO 2 During the dissolution process, Na 2 O·Al 2 o 3 1.7SiO2 2 ·H 2 O (hydrated sodium aluminosilicate) is precipitated, which inevitably causes Na 2 O and Al 2 o 3 The loss increases the cost of smelting, Al 2 o 3 The extraction rate is reduced

Especially bauxite ore with high iron content, after refining Al 2 o 3 Afterwards, the tailings mud—Fe in red mud 2 o 3 The content is usually as high as 35-50%, or even higher, and directly discarding the tailings mud—red mud will inevitably cause waste of resources and environmental pollution.

Due to the complex composition of red mud, it is very difficult to carry out secondary comprehensive development and utilization of red mud, and the production cost is high, so it loses its economic significance

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