Method for preparing ultra-white glass material by purifying fine-grained quartz sandstone

Abstract

The invention relates to a method for preparing an ultra-white glass material by purifying fine-grained quartz sandstone. The fine-grained quartz sandstone is subjected to crushing, (hindered or) screening, ore grinding, advanced or inspection screening, grading, magnetic separation, ultrasonic dissociation-medium scrubbing-grading (desliming and reagent removal), acid flotation-reagent removal, high-temperature dynamic leaching-concentration-cleaning reagent removal and dehydration; the content of Fe2O3 in fine-grained quartz sandstone minerals which are extremely difficult to select can be reduced to be smaller than or equal to 100 ppm, the quality requirement of high-quality quartz sand for ultra-white photovoltaic rolled glass is met, the source of siliceous raw materials for the ultra-white photovoltaic glass is expanded, reasonable utilization of fine-grained quartz sandstone mineral resources is realized, and resource waste is reduced; and meanwhile, media used in the method are thinning waste liquid for etching in the field of information display, the utilization rate of the media is increased, the cyclic utilization rate of wastewater can reach 90% or above, and sewage discharge and treatment cost is reduced.

Description

technical field [0001] The invention relates to a method for beneficiating quartz sandstone minerals, in particular to a method for purifying fine-grained quartz sandstone to prepare materials for ultra-white glass. Background technique [0002] Fine-grained quartz sandstone is a kind of sedimentary rock formed by cementing and solidifying quartz particles (0.125mm~0.25mm content of more than 50%) through silica, clay, iron, chlorite, etc. Quartz sandstone in Sichuan and Hunan Resource reserves of more than 2 billion tons. The grade of raw ore is generally low, the dissemination is serious, and the iron-containing siliceous cement penetrates into the gaps of sandstone particles, which is difficult to dissociate within the particle size range of conventional glass materials (0.1mm~0.71mm); feldspar, tourmaline, garnet, hematite It is also very difficult to selectively capture the associated impurity minerals such as ore and pyrite because they are cemented and wrapped by sil...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the defect of difficult separation and purification of fine-grained quartz sandstone, and provide a method for purifying fine-grained quartz sandstone to prepare ultra-clear glass materials

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