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Method for preparing water glass by using boron mud residue

A technology of water glass and boron mud, applied in the direction of alkali metal silicate, silicate, etc., to achieve great economic benefits and improve the ability of deep processing

Inactive Publication Date: 2016-03-16
常德市金佰特节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to process and comprehensively utilize the re-polluted waste of boron mud waste, in addition to producing magnesium and boron compounds, silicon products are also produced, which not only avoids secondary pollution, but also provides The enterprise creates great economic benefits, which can be described as a model of comprehensive chemical management and utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, a kind of method that utilizes boron sludge to prepare water glass described in the present embodiment, comprises the steps:

[0015] Take 500 kg of boron mud (silicon dioxide accounts for 20%, magnesium oxide accounts for 38%) to react, heat the boron mud to 58-82 degrees with steam, keep it for 1-2 hours, and then dry it with a centrifuge to achieve liquid-solid Separation to obtain filtrate and filter cake boron mud, and the filtrate is sent for further processing;

[0016] The filter cake boron mud (calculated as magnesium oxide) and hydrochloric acid are reacted in the corrosion-resistant first reactor with a pure mass ratio of 1:1.83, and a chemical reaction occurs under gentle stirring, and the reaction generates magnesium chloride hydrate, and other components generate chloride Calcium and a small amount of manganese chloride, the hydrate of magnesium chloride is filtered to obtain clarified filtrate and silica filter residue, and the clarified fil...

Embodiment 2

[0018] Embodiment 2, a kind of method utilizing boron sludge to prepare water glass described in the present embodiment, comprises the steps:

[0019] Take 500 kg of boron mud (silicon dioxide accounts for 20%, magnesium oxide accounts for 38%) to react, heat the boron mud to 58-82 degrees with steam, keep it for 1-2 hours, and then dry it with a centrifuge to achieve liquid-solid Separation to obtain filtrate and filter cake boron mud, and the filtrate is sent for further processing;

[0020] The filter cake boron mud (calculated as magnesium oxide) and hydrochloric acid are reacted in the corrosion-resistant first reactor with a pure mass ratio of 1:2.03, and a chemical reaction occurs under gentle stirring, and the reaction generates magnesium chloride hydrate, and other components generate chloride Calcium and a small amount of manganese chloride, the hydrate of magnesium chloride is filtered to obtain clarified filtrate and silica filter residue, and the clarified filtrat...

Embodiment 3

[0022] Embodiment 3, a kind of method utilizing boron sludge to prepare water glass described in the present embodiment, comprises the steps:

[0023] Take 500 kg of boron mud (silicon dioxide accounts for 20%, magnesium oxide accounts for 38%) to react, heat the boron mud to 58-82 degrees with steam, keep it for 1-2 hours, and then dry it with a centrifuge to achieve liquid-solid Separation to obtain filtrate and filter cake boron mud, and the filtrate is sent for further processing;

[0024] The filter cake boron mud (calculated as magnesium oxide) and hydrochloric acid are reacted in the corrosion-resistant first reactor with a pure mass ratio of 1:1.63, and a chemical reaction occurs under gentle stirring, and the reaction generates magnesium chloride hydrate, and other components generate chloride Calcium and a small amount of manganese chloride, the hydrate of magnesium chloride is filtered to obtain clarified filtrate and silica filter residue, and the clarified filtrat...

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Abstract

The invention relates to a method for preparing water glass by using boron mud residue. The method comprises: heating boron mud with steam to achieve a temperature of 58-82 DEG C, maintaining for 1-2 h, carrying out centrifuge drying with a centrifuge to achieve liquid-solid separation so as to obtain filter cake boron mud, carrying out a chemical reaction of the filter cake boron mud and hydrochloric acid in a first corrosion-resistant reactor under slow stirring according to a pure mass ratio of 1:1.61-2.05 to generate a magnesium chloride hydrate, filtering the magnesium chloride hydrate to obtain the clarified filtrate and the silicon dioxide filter residue, carrying out a reaction of the silicon dioxide filter residue and sodium carbonate in a sealed second reactor under heating pressurization and slow stirring according to a pure mass ratio of 1:1.52-1.95 to generate a sodium metasilicate nonahydrate aqueous solution, and filtering to remove insoluble impurities to obtain a clarified filtrate, wherein the filtrate is the water glass product. According to the present invention, the re-pollution waste material of the boron mud waste material is treated, the water glass is prepared, the secondary pollution is avoided, and the economic benefits are created.

Description

technical field [0001] The invention relates to the technical field of treatment and comprehensive utilization of inorganic chemical wastes, in particular to a method for preparing water glass by utilizing boron sludge. Background technique [0002] Boron mud is based on boronite (2MgO·B 2 o 3 ·H 2 O) is raw material, by roasting, pulverizing, mixing with soda ash, adopting carbon water method to produce borax (Na 2 B 4 o 7 10H 2 O), the solid waste that remains after washing, crystallization process extracts borax. One ton of borax can produce 4 tons of boron mud, and a borax plant with an annual output of 8,000 tons can produce 32,000 tons of boron mud per year. Due to the large discharge of boron mud, various comprehensive utilization methods are currently adopted in China. In addition to the production of light magnesium carbonate and magnesium oxide and rubber and plastic fillers, there are also production of boron magnesium phosphorus compound fertilizers, coal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/32
Inventor 赵克军
Owner 常德市金佰特节能环保科技有限公司
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