Process method for separating quartz sand, arkosic sand and iron powder from river yellow sand

Abstract

The invention provides a process method for separating quartz sand, arkosic sand and iron powder from river yellow sand. The method mainly comprises the following process steps of (1), performing desliming, grading and sheet mica removing; (2), removing iron through magnetic separation and gravity separation; (3), removing an oxidized skin through alkaline wash; (4) performing acid neutralization and removing the iron; (5) separating the quartz sand from the arkosic sand through flotation separation; (6) removing the iron through water wash, the magnetic separation and the gravity separation; (7) removing variegated pellets through photoelectric separation; (8) recycling fine iron powder made of iron. The quartz sand produced by the process method is high in purity, wherein the content of SiO2 is 98.0-99.0%, and the content of Fe2O3 is 0.009-0.015%. The produced arkosic sand can serve as materials of ordinary glass and ordinary ceramics. Metallics obtained through the magnetic separation and the gravity separation can produce the fine iron powder with the grade larger than or equal to 66%. By means of the process method, yellow sand resources are fully utilized without any waste, and the whole production process does not discharge waste alkali and waste acid. Therefore, the process method is friendly to the environment.

Description

technical field [0001] The invention relates to the field of non-metallic mineral processing, in particular to a process for separating quartz sand, feldspar sand and iron powder from river yellow sand. Background technique [0002] Yellow sand and other sand and stone in the river course are one of the important siliceous raw material resources of the country, and play a very important role in the construction of the national economy. In the middle and lower reaches of the Yangtze River in my country, there is abundant rainfall and numerous river channels, and the sandstone resources such as yellow sand in the river channels are relatively rich. Especially, the quality of yellow sand in the river channels under Tongbai Mountain, Dabie Mountain, and Mufu Mountain is the best. The carbon dioxide in the yellow sand The silicon content is 70% to 80%, and other impurities are: a small amount of soil, feldspar, magnetite, ilmenite, limonite, mica flakes, etc. It is a natural high-...

AI Technical Summary

Problems solved by technology

However, this method cannot fundamentally solve the problem of the purity of the purified quartz sand—the separation of mica and feldspar, and the use of the product quartz sand is greatly restricted; and the feldspar sand and iron ore contained in the yellow sand are all Without further recycling, it is used as a by-product for construction raw materials, and the maximum utilization value and best economic benefits of yellow sand have not been brought into play.