CN1053564A - Dry gravitational stratification for separating and refining diatomite - Google Patents

Abstract

A kind of have compact equipment, Gu solid-isolation technics that inorganic matter class impurity method and apparatus constitutes in the high removing natural diatomaceous earth of separative efficiency: dry gravitational stratification for separating and refining diatomite.Its main points are: according to main body component diatom particulate SiO in the natural diatomaceous earth₂With the severe difference of inorganic matter class impurity, in a fluosolids parser with sonic oscillation, turbine fluidisation and cyclonic separation effect, divide natural diatomaceous earth goods fluid chromatography for containing the foreign material bed of material and refining material bed desire; The foreign material material that contains of being drawn by fluosolids parser bottom enters cyclone separator removing foreign matter material; The refining material of drawing by fluosolids parser top with through the separating obtained refining material of cyclone separator converges after, send into the bag hose collection and get the terra silicea purificata product by air blast.

Description

Dry gravitational stratification for separating and refining diatomite

The invention belongs to a solid solid separation method and equipment.

Terra silicea purificata is a raw material of making super-cell, adsorbent, catalyst carrier, additive and surface modifier.The main body component diatom particulate of natural diatomaceous earth is amorphous Si O₂, wherein often contain: the water about 50%; The organic substance of 5-10%; Inorganic matter class impurity such as certain amount of clay, quartz, slightly solubility salt and metal oxide, its content has very big-difference because of place of production difference.Moisture content and organic matter can be used seasoning (＞120 ℃) and calcination method (＜500 ℃) Ex-all respectively.Countries in the world adopt the method for removing inorganic matter class impurity in the natural earth mainly to be at present: the wet method hydraulic flotation; The wet chemistry extraction; Wet method gravitational settling etc.The common drawback of these methods is that process is loaded down with trivial details, the energy consumption height.Adopt the dry method cyclonic separation because of the foreign material that stick on the diatom particulate not being removed, cause dust removal rate very low.Dry method provided by the invention, gravitational stratification, separation method and equipment are not found patent and the non-patent literature report identical or relevant with the present invention through online information retrieval.

The objective of the invention is to create the new method and apparatus of producing terra silicea purificata by natural diatomaceous earth.

The invention provides a kind of compact equipment that has, the method and apparatus of inorganic matter class impurity constitutes in the high removing natural diatomaceous earth of separative efficiency consolidates isolation technics: dry gravitational stratification for separating and refining diatomite.

Method and apparatus main points provided by the invention are: according to main body component diatom particulate SiO in the natural diatomaceous earth₂With clay, quartzy, the severe difference of impurity such as inorganic salts and metal oxide, in structure fluosolids parser as shown in Figure 1, the desire of drying being anhydrated and being crushed to certain particle size divides the natural diatomaceous earth material from pipe 1 appropriate location that is incorporated into the device, feed(raw material)inlet, sonic oscillation effect by ultrasonator 2 generations, adhesion impurity is peeled off from main body component diatom particulate, the eddy current fluidization of utilizing highspeed revolving wormgear 3 to produce is separated from each other main body component diatom particulate and impurity substances, enter centrifugation that whirlwind produces with air intake 4 again and make desire divide the material chromatography for refining material bed (top) with contain the foreign material bed of material (bottom), then will contain foreign material material introducing cyclone separation system removing foreign matter material.

Technological process of the present invention as shown in Figure 2.It is refining material bed and contain the foreign material bed of material that desire divides the natural diatomaceous earth material to be divided in fluosolids parser a, refining material is drawn from fluosolids parser top 5, contains the foreign material material and draws and be conveyed into cyclone separator b by air stream 11 through rotary valve from fluosolids parser bottom 6 and separate once more.Isolated impurity material 7 is discharged through rotary valve from the bottom in cyclone separator b, and separating obtained refining material is drawn and converged the back with the refining material that draws at fluosolids parser top and send into bag hose d by air blast C from top center pipe 8.The effect of bag hose d is to capture refining material and make it and air separation, and the terra silicea purificata product 9 is collected through rotary valve at the bottom of the device, air from device top 10 through evacuated tube emptying.

Process conditions of the present invention are: all operating process is at room temperature carried out; The desire that enters the fluosolids parser divides the natural diatomaceous earth material to contain SiO₂Amount (weight %) is not less than 70%, and water content (weight %) 0～5%, its granularity were 80 mesh sieve surpluses 0～5%; 25000～30000 hertz of ultrasonator frequencies in the fluosolids parser, 2000～3000 rev/mins of revolving wormgear rotating speeds, cyclonic separation air intlet linear velocity 14-18 meter per second, drawing refining inventory by fluosolids parser top is 1/1～4 with drawing the ratio (weight ratio) that contains assorted inventory at the bottom of the device; Cyclone separator contains foreign material material inlet line speed 16～20 meter per seconds, contains SiO in the removing foreign matter material₂Amount (weight %) 10～20%; Bag hose filter cloth aperture is not more than 1 μ, collects to such an extent that contain SiO in the terra silicea purificata by bag hose₂Amount (weight %) is 85～95%.

The present invention can make SiO in the diatomite₂Content improves 10～15%, and active princlple diatom particulate utilization rate reaches more than 95%.

Using method and apparatus provided by the invention removes the technical-economic index of inorganic matter class impurity in the natural diatomaceous earth and compares with wet method gravity settling separation or dry method cyclone centrifugal separation technology and followingly (divide dry material to contain SiO with desire₂75% is benchmark).

(videing infra)

Claims (6)

1, a kind of have compact equipment, Gu solid-isolation technics one dry gravitational stratification for separating and refining diatomite that the method and apparatus of inorganic matter class impurity constitutes in the high removing natural diatomaceous earth of separative efficiency.It is characterized in that by main equipment fluosolids parser auxiliary equipment cyclone separator, air blast and bag hose are combined into the complete method and apparatus of producing terra silicea purificata from natural diatomaceous earth.

2, be the integral device that combines by ultrasonator, revolving wormgear and cyclone separator according to said its architectural feature of main equipment fluosolids parser in the claim 1.

3, be that the ultrasonator frequency is 25000～30000 hertz according to said its operating characteristics of main equipment fluosolids parser in the claim 1, the revolving wormgear rotating speed is 2000～3000 rev/mins, cyclonic separation air intlet linear velocity is 14～18 meter per seconds, and the refining inventory that draw at self-fluidized type chromatography device top is 1/1～4 with the ratio (weight ratio) that contains assorted inventory that draw the bottom.

4, it is characterized in that according to said auxiliary equipment in the claim 1 cyclone separator contains foreign material material inlet line speed 16～20 meter per seconds, discharge the impurity material and contain SiO₂Amount (weight %) is 10～20%; Bag hose filter cloth aperture is not more than 1 μ; Air blast is between cyclone separator and bag hose.

5, according to said natural diatomaceous earth in the claim 1, it is characterized in that containing SiO₂Amount (weight %) is not less than 70%, and water content (weight %) is 0～5%, and granularity was 80 mesh sieve surpluses 0～5%.

6, according to said terra silicea purificata in the claim 1, it is characterized in that containing SiO₂Amount (weight %) is 85～95%.

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