Method for comprehensively using aluminum-containing resource

Abstract

The invention belongs to a resource comprehensive using method, and especially relates to a method for comprehensively using aluminum-containing resource. The method comprises the following steps: 1)heating ammonium sulfate and decomposing to generate ammonium bisulfate and ammonia gas; 2)mixing the aluminium-containing resource and ammonium bisulfate in the step 1), adding water or a washing lotion; 3)cooling a reaction product and performing solid-liquid separation, washing to obtain a solution of aluminium ions and iron ions and an excessive ammonium bisulfate solution and high silicon slag; 4)adding ammoniacal liquor or ammonia gas in the solution of the step 3) to obtain aluminium hydroxide and iron hydroxide sediment and an ammonium sulfate solution, then performing solid-liquid separation, and washing; 5)performing evaporative crystallization on ammonium sulfate solution obtained in the step 4), and separating to obtain an ammonium sulfate solid; and 6)processing the aluminium hydroxide and iron hydroxide solid obtained in the step 4) to obtain metallurgy grade alumina and high iron slag. The method has the advantages of low energy consumption, high leaching rate of alumina and iron, high enrichment degree of active ingredients and low production cost.

Description

technical field [0001] The invention belongs to a method for comprehensive utilization of resources, in particular to a method for comprehensive utilization of aluminum-containing resources. Background technique [0002] Over the years, with the rapid development of the national economy, my country's aluminum industry has achieved unprecedented development. Alumina, as a raw material for electrolytic aluminum, has also developed rapidly. It has become the world's largest producer of alumina. At present, my country's alumina enterprises have reached 40 There are a number of companies with a production capacity of more than 50.5 million tons / year under construction and 37 million tons / year of processing domestic bauxite. In 2012, the national alumina output was 37.696 million tons, making it the world's largest alumina producer. However, my country is a country with relatively poor bauxite resources. At present, my country's identified and inferred bauxite resource reserves ha...

AI Technical Summary

Problems solved by technology

Because the ore grade (ore aluminum-silicon ratio) has a great influence on the current alumina production cost, the existing methods are not suitable for processing low-grade bauxite or aluminum resources

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