Mineral processing and deep purification method for quartz sand

Abstract

The invention discloses a mineral processing and deep purification method for quartz sand. The method comprises the following steps of (a) during the scrubbing of the quartz sand in an acid-digestion scrubbing machine, adding a sulfuric acid solution with the weight concentration of 15-60% for acid digestion, wherein the weight ratio of the quartz sand to the sulfuric acid solution is 25-65%, the temperature for acid digestion is 50-135 DEG C, the time for acid digestion is 20-90 minutes, and sulfuric acid can quickly react with iron-bearing minerals in the quartz sand through the organic combination of the mechanical scrubbing and acid digestion of the quartz sand; and (b) after acid digestion, separating the quartz sand from filtrate through filtrating, wherein the filtrate can be recycled, and products with Fe2O3 content meeting requirements are obtained after the quartz sand is cleaned. The method has the beneficial effects that aims which can not be achieved by the conventional mineral processing methods are realized, the dependence on high-quality siliceous resources is lowered, and the utility value of the quartz sand products is increased; and the method can also be applied to the field of the mineral processing and purification of non-metallic minerals, such as quartz fine (tail) sand, feldspar and the like.

Description

[0001] technical field [0002] The invention relates to a method for deep purification of quartz sand beneficiation, which utilizes H 2 SO 4 Rapid reaction with iron-containing impurity minerals ubiquitous in quartz to generate water-soluble Fe 2 (SO 4 ) 3 or FeSO 4 and was removed. Background technique [0003] Quartz (sand) is an important industrial mineral raw material, widely used in glass, ceramics, metallurgy, construction, electrical and electronics, aerospace and other fields, of which Fe 2 o 3 Content is a key factor affecting the quality of quartz sand products and their use value. With the development of science and technology and the progress of society, high-tech fields such as electrical and electronics, semiconductors, and aerospace have higher and higher requirements for quartz quality, and the demand for high-purity (low-iron) quartz sand is increasing, and high-quality quartz Mineral resources are increasingly depleted. Conventional beneficiation...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a deep purification method for quartz sand in order to solve the defect of high iron content in quartz sand existing in the existing deep purification method of quartz sand beneficiation

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