CN102432023A

CN102432023A - Purification method of low grade diatomite

Info

Publication number: CN102432023A
Application number: CN201110266630XA
Authority: CN
Inventors: 李世伟; 王泽民
Original assignee: Individual
Current assignee: Li Shiwei
Priority date: 2011-09-09
Filing date: 2011-09-09
Publication date: 2012-05-02

Abstract

The invention relates to a purification method of low grade diatomite. In order to make fully use of limited mineral resources, the invention conducts purification processing to second and third grade diatomite with low silicon content through a water separation method. And the selected equipment combines a scrubbing machine and a hydrocyclone, and the combination has good separation and impurity removing effect as well as high purification yield, and can adjust particle size distribution based on product needs. A permeable layer composed of sand and stones is disposed at the bottom of a self-made settling basin for diatomite and water separation, and the separation method has the advantages of rapid dehydration, less investment and high efficiency, etc. The water discharged can be recycled. Drying of the invention adopts a method combining natural drying by solar energy and forced drying by man power. The whole production process of the invention is in accord with the environmental protection requirements for energy saving and emission reduction.

Description

Low taste method for purifying diatomite

Technical field

The present invention relates to the nonmetalliferous ore method for purifying diatomite.

Background technology

Zeyssatite is the formed silicastones of extinct plants and animal diatom remains, in its forming process, mix a lot of clay minerals, quartz, feldspar, and impurity such as some compound, foreign matter content is many, and silicone content is just few relatively, and this is main points of distinguishing the zeyssatite grade.

About 1,000,000,000 tons of China's zeyssatite reserves, but high-quality soil proportion is seldom, the Ma'an Mountain's diatomite ore of Jilin, the high-quality soil large-scale mineral deposit governor Bai that has just found-near a river, high-quality one-level soil also only accounts for 20%～30%, and all the other are two, three grades of soil.Zeyssatite manufacturer only exploited one-level soil mostly in recent years, and two, three grades of regoliths abandon, and cause the significant wastage of limited resources.

For a long time; A lot of scholars have done unremitting effort for two, three grades of soil of exploitation, work out like methods such as dry method selection by winnowing, s.t. purification, negative pressure explosion, UW coupling, dispersing and settling, mechanical vibration, but high because of cost mostly; Investment is big, and effect is undesirable and fail to accomplish scale production.

Summary of the invention

The present invention is the method that adopts wet concentration, replaces the dry method selection by winnowing of highly energy-consuming.

1, zeyssatite is water insoluble, can sedimentation in water, and the diatom soil body is light different with the impurity proportion of sneaking into, and around this principle selects scrubber and hydrocyclone combination carrying out removal of impurities purification for use, tells a difference high-quality zeyssatite through grade simultaneously.

2, zeyssatite adopts sand, stone to make up permeable settling bowl with separating of water.

3, the dry method that adopts the sun power seasoning to combine with artificial strong drying.

Embodiment (the secondary soil of silicon content 80% is example)

One, technical process

1, original soil adds water concentration than 25%

Through scrubber the diatom original soil particle is broken up, impurity such as clay are separated with diatom body shell, selectively add dispersion agent at this moment; Then according to settling velocity; Particle size differences is separated, and cleans after 20 minutes sedimentation 10 minutes, and underflow is abandoned.

2 times repeatedly, overflow water inlet power swirler-group.

2, the effect of three groups of hydrocyclone groups such as following table

Above data show that secondary soil can reach one-level soil standard behind wet concentration, and yield can also be adjusted size-grade distribution according to product needed more than 65%; The pump that hydrocyclone is selected for use will be selected variable-frequence governor for use; Be used for optimizing fluid parameter and reach optimum data and join value, because diatomite particle is tiny, body is light; So it is big that the hydrocyclone length-to-diameter ratio of design is wanted, be advisable for 1 °～1.5 ° in the cone inclination angle.

3, muddy zeyssatite will get into settling bowl and carries out separating of zeyssatite and water behind wet concentration; Pervious bed is formed by middle stone, finger stone, sand, finger stone cement in the settling bowl bottom; About total thickness 200mm, be provided with the draining hole all around, the water of discharge can be recycled.This separation method makes diatom separate very soon with water, and permeable speed is superior to plate-and-frame filter press, has both saved facility investment, enhances productivity again.

4, the zeyssatite after the separation gets into drying stage; The dry method that adopts seasoning to combine with artificial strong drying; Solar energy collector is adopted in seasoning, solar energy heat-storage device and the solar energy drying chamber that ventilates and combine, and seasoning reaches about 20% to material moisture; Get into artificial strong drying again, this method energy-conserving and environment-protective.

The optional various drying plants of artificial strong drying, but fuel such as thermal source coal separation, electricity, Sweet natural gas.

Conclusion: show that through practice method of the present invention can make diatom secondary soil bring up to one-level soil index, yield is more than 65%, and purifying technique is simple; Non-environmental-pollution; Water can also recycle, energy-saving and emission-reduction, and this method is used for the purification of three grades of soil equally; Effectively utilize the diatom resource, have remarkable economic efficiency and social benefit.

Claims

1. sample method for purifying diatomite for one kind low, wet concentration adopts scrubber and the combination of different size hydrocyclone, removes impurity and adjusts size-grade distribution simultaneously, and high-quality one-level soil widely is applied.

2. zeyssatite and water sepn adopt the self-control settling bowl, and the bottom is by middle stone, finger stone, sand, the pervious bed that finger stone and cement are formed, and velocity of separation is fast, invests little efficient height, and being provided with draining hole water all around can recycle.

3. drying utilizes sun power seasoning and artificial strong drying to combine energy-conserving and environment-protective.