Method of preparing low iron-containing quartz sand for photovoltaic glass from pyrite type quartzite and pickling purification apparatus

Abstract

The invention provides a method of preparing low iron-containing quartz sand for photovoltaic glass from pyrite type quartzite and a pickling purification apparatus. The method comprises following steps: washing collected pyrite-containing quartzite, crushing, and preparing sand by wet method; subjecting prepared sand slurry to magnetic separation and screening; collecting sand slurry of 24 to 120 meshes, subjecting the sand slurry to fine-washing, gravity separation, and magnetic separation, and removing water; transferring dewatered sand into the pickling purification apparatus, adding a mixed acid solution, and performing circulating pickling, wherein the mixed acid solution is heated to 75 to 90 DEG C, and circulating pickling is preformed for 3 to 4h at the temperature of 75 90 DEG C; and removing the mixed acid solution, washing the sand with clear water until the pH value is 7, and then dewatering so as to obtain low iron-containing quartz sand. The method is advanced in technology; the apparatus is scientific and reasonable in design; operation is convenient; automation degree is high; production amount is large; product quality is stable; production cost is low; large-scaled production of low iron-containing quartz sand is realized; economic benefits and social benefits of enterprises are increased by scientific and reasonable development and application of pyrite-containing quartzite.

Description

technical field [0001] The invention belongs to the technical field of non-metallic ore deep processing, and in particular relates to a method for preparing low-iron quartz sand for photovoltaic glass from pyrite-type quartzite and a pickling purification device. Background technique [0002] With the continuous development of human society and the continuous advancement of science and technology, the primary energy represented by oil, coal, and natural gas is decreasing day by day, while its price continues to rise, and these primary energy sources will cause great harm to the environment during the use process. For this reason, a profound transformation of the energy structure is taking place all over the world. Solar energy is playing a very important role as one of the cleanest and sustainable new energy sources. Solar photovoltaic power generation projects are a sunrise industry that is strongly supported by governments of all countries. As one of the key components of...

AI Technical Summary

Problems solved by technology

The mineral impurities are generally distributed on the outer surface of the quartz ore or wrapped inside the quartz ore in the form of particles of different sizes. The pyrite mineral impurities wrapped inside the quartz ore are difficult to find in the process of artificial beneficiation, and the Impurity minerals have a remarkable characteristic: non-magnetic and brittle. Once it flows into the processing procedure, it will be broken into many fine particles mixed in the quartz sand and difficult to remove in the process of ore sand making, so that it affects The deep processing value of this kind of ore and the overall benefit of the enterprise

[0004] After retrieval, the current method of preparing quartz sand for glass industry with pyrite-type quartzite ore, such as the Chinese invention patent publication number is CN101967037A, CN101940975A, CN101940976A, etc. All of them use flotation or mechanical erasure to separate the sulfur iron minerals from the crushed, screened, magnetically separated minerals, and the purity of the quartz sand obtained by flotation or mechanical erasure is uniform. Cannot meet the requirements of SiO2≥99.0% and Fe2O3≤0.010% in low-iron quartz sand for solar photovoltaic glass

Images