CN101987480A

CN101987480A - Preparation method of non-pickling raw kaolin ore

Info

Publication number: CN101987480A
Application number: CN2009101622434A
Authority: CN
Inventors: 施永义; 余小华
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-31
Filing date: 2009-07-31
Publication date: 2011-03-23

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

A kind of preparation method who does not have pickling kaolin raw ore

Technical field

The present invention relates to a kind of washing methods, especially a kind of preparation method of anacidity washup to impurity such as kaolin deferrizations.

Background technology

Kaolin generally contains outside the essential minerals such as kaolinite, galapectite, also contains less important mineral quartz, alunite, a small amount of pyrite, bloodstone, limonite and objectionable impurities such as rutile or anatase.In order to purify, technological processes such as gravity treatment, high-gradient magnetic separation, ultra-fine flotation, bleaching have been adopted in the industry.High-gradient magnetic separation is effective equipment that the pyrite of kaolinite and weak magnetic, bloodstone, limonite, rutile etc. are separated, but energy consumption big, cost an arm and a leg; Ultra-fine flotation can make kaolinite separate with alunite, but exists the problem that carrier cleans, reclaims; The bleaching effect or the effect of the technology sodium hydrosulfite reducing process of kaolin bleaching deferrization at present, oxidizing process, redox combination method are bad, or the cost height.And waste water is acid, and is very big to ambient influnence; Some producer also adopts the reselecting method of water elutration classification, but the kaolin raw material of the three kinds of impurity such as iron content, titanium, sulphur of can not purifying effectively.

Summary of the invention

Shortcoming and technical barriers such as technical problem to be solved by this invention is, a production cost height poor at the bleaching effect of present kaolin reducing process, oxidizing process, redox combination method, brightness reversion is fast and environmental pollution is serious obtain the kaolin fine fodder thereby handle with a kind of brand-new preparation method carries out impurity such as deferrization, titanium, sulphur to the kaolin raw ore deep processing.

For this reason, the technical scheme that the present invention solves described problem is: a kind of preparation method who does not have pickling kaolin raw ore, and wherein, described method comprises step:

(A) kaolin ore is ground sieve the kaolin raw material;

(B) described kaolin raw material is poured in the special-purpose dispensing equipment and container;

(C) in described container, carry out according to the order of sequence: stir by force slurrying-precipitate and separate-rotational flow separation-bleaching deironing-sedimentation and drawing-press filt drainage-detection index-. the kaolin fine fodder.Simultaneously, in described step (C), add chelating agent, can reduce Fe ²⁺Oxidability.And, in described step (C), add the cation absorbent, can reduce kaolin surface absorption Fe ²⁺Ability.

Also need in described step (C), add strong heavy aqua, can improve pulp density.And the cation absorbent in described interpolation cation adsorbent step, its mol ratio Fe ²⁺=0.5～1.5: 1.

Compared to existing technology, outstanding and the significant technique effect that the present invention has is fairly obvious: three steps of above-mentioned (A), (B), (C) are the necessary processes that obtain the kaolin fine fodder with preparation method provided by the invention, and in (C) step employed strong reductant, compare with traditional sodium hydrosulfite, has higher reduction potential, and the decrease speed of reduction potential is slow, only is that traditional sodium hydrosulfite reduction potential reduces 1/5 of number; This step has strengthened the effect of removing coloring impurity in the kaolin; And make reducing agent have the effect that can control reduction, its security performance is good, produces and use characteristics such as pollution-free, deironing rate height.

Description of drawings

Fig. 1 is the anacidity washup preparation method's that the present invention relates to a process chart.

The specific embodiment

Referring to Fig. 1,, need purify to the kaolin raw ore because the many harmful substances in the kaolin have limited its application.When the no pickling kaolin raw ore preparation method who implements the present invention relates to, the kaolin that at first will grind after the sieve mesh is poured in the stirring pool, under the prerequisite of dispensing equipment that uses special use and container set by step:

1. stir slurrying-precipitate and separate-rotational flow separation-bleaching deironing-sedimentation and drawing-press filt drainage-detection index by force.

2. add chelating agent, reduce the oxidability of Fe2+, improve the de-ironing efficiency of product.

3. add cation absorbent (cation absorbent: Fe ²⁺(mol ratio)=0.5～1.5: 1), reduce kaolin surface adsorption Fe ²⁺Ability, improve the de-ironing efficiency of product.

4. add strong heavy aqua, improve pulp density, boost productivity.

Can realize in the washup production of the technological break-through of kaolin raw ore by above implementation step with impurity such as anacidity washup deironing, titanium, sulphur, it is big to have solved in the past traditional removing iron by kaolin weak effect, environmental pollution simultaneously, problems such as production efficiency is low, energy consumption is big, the cost of investment of founding the factory height, and then promoted kaolinic utilization and exploitation, realized CR production.

Claims

1. a preparation method who does not have pickling kaolin raw ore is characterized in that, described method comprises step:

(A) the kaolin raw ore is ground sieve the kaolin raw material;

(C) in described container, carry out according to the order of sequence: stir by force slurrying-precipitate and separate-rotational flow separation-bleaching deironing-sedimentation and drawing-press filt drainage-detection index-. the kaolin fine fodder.

2. the preparation method of no pickling kaolin raw ore according to claim 1 is characterized in that, adds chelating agent in described step (C), can reduce Fe ²⁺Oxidability.

3. the preparation method of no pickling kaolin ore according to claim 1 is characterized in that, adds the cation absorbent in described step (C), can reduce kaolin surface absorption Fe ²⁺Ability.

4. the preparation method of no pickling kaolin raw ore according to claim 1 is characterized in that, adds strong heavy aqua in described step (C), can improve pulp density.

5. the preparation method of no pickling kaolin raw ore according to claim 3 is characterized in that, the cation absorbent in described interpolation cation adsorbent step, its mol ratio Fe ²⁺=0.5～1.5: 1.