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Process for preparing sodium silicate

A production method and technology of sodium silicate, applied in the direction of silicate, alkali metal silicate, etc., can solve the problems of low aluminum content, poor fluidity, low bulk density of silica, etc., and achieve high bulk density. , good fluidity, beautiful particle effect

Inactive Publication Date: 2004-10-20
JIANGSU DEBANG CHEMICAL INDUSTRY GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] One of the main uses of sodium silicate is as a raw material for the production of white carbon black. In the prior art, the sodium silicate produced by melting quartz sand with low aluminum content and soda ash at high temperature has the following problems: The quantity is low, and the bulk density of the white carbon black produced by using it as raw material is small, only 0.20-0.24 g / cm3; it is not easy to handle, that is, the fluidity is not good, and the angle of repose is 38-48; there is a lot of dust, and the dust passing through 200 mesh is in the Between 10% and 30%; after absorbing liquid, there are many agglomerates, reaching 2% to 10%; the median particle size is between 120 and 180 microns, and the particles are not beautiful

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Embodiment 1: Produced in Yinan, Shandong Province, quartz sand with high natural aluminum content of 0.5% and soda ash are prepared in a weight ratio of 1.70:1, fully stirred evenly, and put into a kiln through a feeder. At a high temperature of 1300°C, after 50 hours of melting reaction, the material is discharged to produce sodium silicate with high aluminum content. The product modulus is 3.0, and the product modulus is SiO in sodium silicate. 2 Content and Na 2 The ratio of O content, the material is discharged by dry method, that is, it is directly discharged into the module, and then cooled naturally to form solid sodium silicate.

Embodiment 2

[0009] Example 2, the natural high-aluminum quartz sand and soda ash produced in Zhengzhou, Henan Province, with an aluminum content of 0.7% were prepared in a weight ratio of 1.87:1, fully stirred evenly, and put into a kiln through a feeder, at 1450 Under the high temperature of ℃, the material is discharged after melting reaction for 40 hours, and the sodium silicate with high aluminum content is generated, and the product modulus is 3.3. The difference from Example 1 is that the material is discharged by wet method, that is, the material When cooled to 160 degrees Celsius, put it into the dissolution kettle, and then pass 0.6 MPa steam into the dissolution kettle to generate liquid sodium silicate.

Embodiment 3

[0010] Example 3: Prepare high-alumina quartz sand with a high natural aluminum content of 0.6% and soda ash produced in Lianyungang, Jiangsu Province in a weight ratio of 2.09:1, stir well, and put it into the kiln through a feeder. At a high temperature of 1500°C, after 30 hours of melting reaction, the material is discharged, and sodium silicate with high aluminum content is produced. The product modulus is 3.7. into the dissolution kettle, and then pass 0.58 MPa steam into the dissolution kettle to generate liquid sodium silicate.

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Abstract

A process for praparing sodium silicate includes such steps as mixing natural quartz sand containing Al (0.5-0.7%) with sodium carbonate in weight ratio of (1.7-2.09):1, stirring to uniformity, and fusion reaction at 1250-1500 deg.C for 30-50 hr in furnace. The resultant has high Al-content (0.45-0.55 wt%), which causes the variation of white carbon black in physico-chemical properties prepared from the said sodium silicate.

Description

technical field [0001] The invention relates to a novel production method of sodium silicate. Background technique [0002] One of the main uses of sodium silicate is as a raw material for the production of white carbon black. In the prior art, the sodium silicate produced by melting quartz sand with low aluminum content and soda ash at high temperature has the following problems: The quantity is low, and the bulk density of the white carbon black produced by using it as raw material is small, only 0.20-0.24 g / cm3; it is not easy to handle, that is, the fluidity is not good, and the angle of repose is 38-48; there is a lot of dust, and the dust passing through 200 mesh is in the Between 10% and 30%; after absorbing liquid, there are many agglomerates, reaching 2% to 10%; the median particle size is between 120 and 180 microns, and the particles are not beautiful. Contents of the invention [0003] The technical problem to be s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/32
Inventor 赵祥海
Owner JIANGSU DEBANG CHEMICAL INDUSTRY GROUP CO LTD