Preparation method of non-pickling raw kaolin ore

Abstract

The invention relates to a preparation method of non-pickling raw kaolin ore. The method comprises the following steps of: (A) grinding and screening raw kaolin ore to obtain a raw screening material; (B) pouring the raw screening material into a special proportioning device and a container; and (C) sequentially carrying out the following steps in the container: forcefully stirring to prepare slurry; precipitating and separating; eddying and separating; blanching to remove iron; precipitating and dewatering; pressing the slurry and filtering water; detecting indexes; and obtaining kaolin concentrate. The former three steps (A), (B) and (C) form a necessary process for obtaining the kaolin concentrate, a strong reducing agent used in the step (C) has higher reduction potential compared with the traditional hydrosulfite and low declination speed of the reduction potential to be only 1 / 5 the declination number of the reduction potential of the traditional hydrosulfite, and the step enhances the effect of removing coloring impurities in the kaolin. Moreover, the reducing agent has the action of controlling reduction and has the advantages of good safety performance, pollution-free production and use, high iron-removal rate, and the like.

Description

technical field [0001] The invention relates to a washing method for removing impurities such as kaolin, in particular to a preparation method for pickling-free ore. Background technique [0002] Kaolin generally contains major minerals such as kaolinite and halloysite, as well as minor minerals such as quartz and alunite, a small amount of harmful impurities such as pyrite, hematite, limonite, rutile or anatase. In order to purify, gravity separation, high gradient magnetic separation, ultra-fine flotation, bleaching and other technological processes are adopted in the industry. High-gradient magnetic separation is an effective equipment for separating kaolinite from weakly magnetic pyrite, hematite, limonite, rutile, etc., but it consumes a lot of energy and is expensive; ultra-fine flotation can make kaolinite It is separated from alunite, but there are problems of carrier cleaning and recovery; the current bleaching and deferrization techniques of kaolin are sodium redu...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to aim at the shortcomings and technical problems of the current kaolin reduction method, oxidation method, and redox combined method, such as poor bleaching effect, high production cost, rapid yellowing and serious environmental pollution, etc., with a new preparation method Deep processing of kaolin raw ore to remove impurities such as iron, titanium and sulfur to obtain kaolin concentrate

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