Method for preparing high-and-middle-class ceramic kaolin from kaolin scavenging tailings

Abstract

The invention provides a method for preparing high-and-middle-class ceramic kaolin from kaolin scavenging tailings. The method comprises the steps: performing selective ball milling by using a ball mill firstly, then performing water grading and sorting by using hydrocyclones of different diameters, then using a high-gradient magnetic separator to remove magnetic materials, performing ultrafine grinding and stripping by using a grinding stripping machine finally, and then performing dehydration treatment so as to obtain the high-and-middle-class ceramic kaolin. The kaolin scavenging tailings is purified by using the method, the content of Al2O3 is increased, and the content of Fe2O3 is reduced, so that the obtained kaolin has high calcination whiteness at 1280 DEG C and a high plasticity index, and requirements of high-and-middle-class ceramics for kaolin are met. The method has small production occupied space, low cost, a large processing capacity, high production efficiency and a high degree of automation.

Description

Technical field [0001] The invention relates to the processing field of non-metallic minerals, in particular to a method for preparing kaolin for medium and high-grade ceramics with kaolin scavenging tailings. Background technique [0002] Kaolin is a non-metallic mineral, a kind of clay and clay rock dominated by kaolinite clay minerals. Because it is white and delicate, it is also called white cloud soil. The pure kaolin is white, fine, soft and soft, with good plasticity and fire resistance. Its mineral composition is mainly composed of kaolinite, halloysite, hydromica, illite, montmorillonite, quartz, feldspar and other minerals. Kaolin has a wide range of uses. It is mainly used in papermaking, ceramics and refractory materials, followed by coatings, rubber fillers, enamel glazes and white cement raw materials. A small amount is used in plastics, paints, pigments, grinding wheels, pencils, daily cosmetics, soap, Pesticide, medicine, textile, petroleum, chemical, building ...

AI Technical Summary

Problems solved by technology

The former method leads to inefficient utilization of resources; the latter method, due to the addition of mechanical iron and long-term mechanical reel, will cause harmful mineral particles to become smaller and enter the 325-mesh coarse concentrate slurry during the reeling process. The burden of iron removal is aggravated, and at the same time, it takes 8 hours to pass through the machine, which consumes a lot of energy and takes a long time to process.