Chemical industry metallurgical comprehensive approach for nepheline ore by completely-wet method

Abstract

The invention provides a chemo-metallurgical technique taking nepheline ore as a raw material and adopting a whole wet method to prepare alumina and aluminum, potassium and silicon fine chemical products. The treatment method comprises: taking sulfuric acid as a leaching agent, and halide as an activator, making silicon in the nepheline ore be decomposed and run off in the form of gas phase halide, the aluminum and potassium enter a solution in the form of sulfate, the gas phase halide of silicon is oxidized into gas phase white carbon black products through ammoniation, a leaching solution containing potassium and aluminum ions realizes the potassium and aluminum separation through ion exchange, different aluminum-containing products are acquired by means of concentration, polymerizationor aluminum precipitation respectively, and potassium on a potassium post adopts an elution method for acquiring potassium-containing products. The technique has advantages of high recovery utilization rate of valuable elements and avoiding the pollution by the three wastes, and is particularly suitable for developing high potassium and high silicon type nepheline in the Gejiu area of China.

Description

technical field [0001] The present invention is a kind of chemical metallurgical technology for producing aluminum oxide and fine chemical products of aluminum, potassium and silicon by using nepheline ore as raw material through all-wet method. Background technique [0002] Nepheline is a complex rock mainly composed of potassium aluminum silicate double salt. Due to its insolubility to conventional acids, alkalis, salts and water, it is difficult to develop and utilize, especially difficult to develop and utilize silicon, aluminum, potassium, etc. Valuable components. So far, only Russia’s Volkhov Aluminum Plant, Pokarev Alumina Plant, and Achinsk Alumina Joint Enterprise have been seen, targeting Russian nepheline with high aluminum and low potassium (containing Al 2 o 3 27-29%, K 2 O 1~3%, SiO 2 ~45%) composition and the serious lack of bauxite in Russia but not lack of potassium resources, the report of the fire method development and utilization of nepheline for t...

AI Technical Summary

Problems solved by technology

For more than half a century from 1954 to the present, a group of scientific research institutes and colleges inside and outside the province have conducted repeated research and demonstrations on the development of the nepheline mine, but because they did not jump out of the Russian pyrotechnic route, the proposed plan not only The investment is huge, the output rate of aluminum is low, and the comprehensive utilization is poor, the value of the product structure is low, and the economy cannot be balanced. So far, the discussion has not been resolved, and no substantive experiments and industrial development have been carried out.

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