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Method for producing sodium silicate by utilizing sodium sulfate

A technology of sodium sulfate and sodium silicate, applied in silicates, alkali metal silicates, chemical instruments and methods, etc., can solve the problems of high energy consumption, environmental pollution, inability to recycle, etc. The effect of short process and low production cost

Active Publication Date: 2016-04-06
钢研晟华科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a new method utilizing sodium sulfate to produce sodium silicate, which can solve the problem of high energy consumption and serious environmental pollution when traditional sodium sulfate is used to produce sodium silicate. 2 The problem of not being able to recycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Raw material: Industrial Na 2 SO 4 , quartz sand (particle size 100 mesh), reducing agent: 75# ferrosilicon powder (particle size 10 mesh).

[0040] (2) Process steps: industrial Na 2 SO 4 100kg, 21kg of quartz sand, 14kg of 75# ferrosilicon powder are mixed and added to the smelting reduction furnace. The smelting reduction furnace is heated to 1450°C by electric heating, and reacted by electromagnetic stirring for 20 minutes. After the reaction is completed, the sodium silicate melt is water-quenched to prepare Obtain sodium silicate product and collect SO in flue gas 2 Concentrated sulfuric acid with a concentration of 98% was prepared.

Embodiment 2

[0042] (1) Raw material: Industrial Na 2 SO 4 , quartz sand (grain size 50 mesh), reducing agent: 45# ferrosilicon powder (grain size 50 mesh).

[0043] (2) Process steps: industrial Na 2 SO 4 100kg, 63kg of quartz sand, 22kg of 45# ferrosilicon powder are mixed and added to the melting reduction furnace. The melting reduction furnace is heated to 1350°C by microwave heating, and reacted by electromagnetic stirring for 60 minutes. After the reaction is completed, the sodium silicate melt is water-quenched to prepare Obtain sodium silicate product and collect SO in flue gas 2 Concentrated sulfuric acid with a concentration of 98% was prepared.

Embodiment 3

[0045] (1) Raw material: Industrial Na 2 SO 4 , quartz sand (particle size 200 mesh), reducing agent: metal silicon powder (particle size 100 mesh).

[0046] (2) Process steps: industrial Na 2 SO 4 100kg, 106kg of quartz sand, and 10kg of metal silicon powder are mixed and added to the smelting reduction furnace. The smelting reduction furnace is heated to 1400°C by means of external gas heating, and reacted by electromagnetic stirring for 120 minutes. After the reaction is completed, the sodium silicate melt is water-quenched to prepare Sodium silicate products to collect SO in flue gas 2 Concentrated sulfuric acid with a concentration of 98% was prepared.

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Abstract

The invention belongs to the technical field of chemical production, and relates to a method for producing sodium silicate by utilizing sodium sulfate. The method can also be used for producing the sodium silicate or white carbon black. The method comprises the following steps of (1) raw material preparation: putting sodium sulfate, quartz sand and a reducing agent into a smelting reduction furnace according to a certain mass ratio; (2) reduction reaction: carrying out a heating reaction on the raw materials in the smelting reduction furnace and simultaneously stirring the raw materials; (3) product obtaining: carrying out water quenching on a sodium silicate melt body, which is generated after the reaction is completed, to make the sodium silicate melt body into a sodium silicate product, and collecting SO2 gas generated in the reaction to prepare concentrated sulfuric acid. The method disclosed by the invention is simple in technological process and low in energy consumption, the purity of the generated sodium silicate product is high, SO2 can be totally recycled, and the method has the characteristics of energy conservation, environment protection and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and relates to a method for producing sodium silicate by using sodium sulfate. Background technique [0002] Sodium silicate, commonly known as sodium silicate, is a water-soluble silicate, and its aqueous solution, commonly known as water glass, is a binder. Its chemical formula is R 2 O nSiO 2 , where R 2 O is an alkali metal oxide, and n is the ratio of silicon dioxide to the number of moles of alkali metal oxide, which is called the modulus of water glass. Sodium silicate is a chemical raw material with a wide range of uses. It is used to manufacture various silicate products such as silica gel, white carbon black, zeolite molecular sieve, and silica sol. It is the basic raw material for silicon compounds. [0003] There are two main production methods of sodium silicate in industry: dry method (solid phase method) and wet method (liquid phase method). Dry production is to co...

Claims

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Application Information

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IPC IPC(8): C01B33/32C01B17/50C01B17/74
CPCC01B17/505C01B17/74C01B33/32C01P2006/80
Inventor 高建军齐渊洪严定鎏林万舟王锋王海风
Owner 钢研晟华科技股份有限公司
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