Environment-friendly alumyte synthesized smelting technical solution

Abstract

The invention provides an environment protective type novel technical proposal, which is suitable for integrated selection for laminar deposited and secondary deposited diaspore type and gibbsite-type bauxite ores contained high quantity of silicon, iron and sulfur. Through utilizing the novel technical proposal, during the selecting process of the alumyte, zero consumption of Na2O and Al2O3 can be achieved in desilication and the digestion of bayer process, Na2O*H2O can be used circularly without any limitation, calcium silicate, alumina, gallium compound, iron concentrate powder and calcium titanate are separated from the alumyte with a high quantity of the silicon, iron and sulfur at one time, and the high efficiency overall development and utilization for alumyte resource can be achieved, without waste ore tailings, and the level of resources utilization can be enhanced.

Description

Technical field [0001] The invention provides an environment-friendly new technology scheme suitable for the comprehensive beneficiation and smelting of monohydrate and trihydrate bauxite ores with high content of silicon, iron and sulfur in sedimentary layers and secondary accumulations. Using the technical solution of the present invention, in the process of beneficiation and smelting of bauxite, both desilication and Bayer dissolution treatment can achieve Na 2 O and Al 2 O 3 "Zero" loss, Na 2 O·H 2 O can be recycled infinitely, and the bauxite with high content of silicon, iron and sulfur can be separated into semi-finished products of calcium silicate, alumina and gallium, iron concentrate powder, calcium titanate, etc. Efficient comprehensive development and utilization, no waste tailings discharge, fully improve resource utilization. Background technique [0002] At present, there are two basic practical methods for industrial smelting bauxite at home and abroad,...

AI Technical Summary

Problems solved by technology

This method has low production efficiency, and only removes soluble kaolinite in bauxite, but cannot remove 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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