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Recycling method of carbide slag

A processing method and technology for carbide slag, applied in cement production and other directions, can solve the problems of low product added value, difficult to consume carbide slag, and economic benefits are not obvious, and achieve high product added value, good economic benefits, and less equipment investment. Effect

Inactive Publication Date: 2012-03-21
开封新巨源环保科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the treatment and utilization method of calcium carbide slag is mainly to use calcium carbide slag to produce building materials such as cement and building bricks. Although the production process is simple and the technology is mature, the added value of the product is low and the economic benefits are not obvious, so it is difficult to consume a large amount. carbide slag

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A resourceful treatment method for carbide slag, the treatment method comprising the following steps:

[0032] (1) Add 100g of calcium carbide slag with a water content of 20% to a 1000mL four-neck flask equipped with a stirrer, reflux condenser and constant pressure funnel, then add 68g of water and 422g of sodium carbonate solution with a concentration of 13.3% by weight, and After stirring and reacting at 90°C for 1 hour, cool and filter to obtain bright yellow filtrate B and off-white filter residue A. The obtained filtrate B is caustic soda solution. g activated carbon, stirred and decolorized for 0.5 hour under micro-boiling conditions, cooled and filtered to obtain a colorless and transparent filtrate, then evaporated and concentrated under normal pressure to obtain 146g of colorless and transparent 30% caustic soda, and the waste activated carbon was mixed as fuel for incineration;

[0033] (2) Add filter residue A to a 1000mL four-neck flask equipped with a sti...

Embodiment 2

[0036] A resourceful treatment method for carbide slag, the treatment method comprising the following steps:

[0037] (1) Add 100g of calcium carbide slag with a water content of 20% to a 2000mL four-neck flask equipped with a stirrer, reflux condenser and constant pressure funnel, then add 68g of water and 1125g of sodium carbonate solution with a concentration of 5% by weight, and After stirring and reacting at 70°C for 2 hours, cool and filter to obtain bright yellow filtrate B and off-white filter residue A. The obtained filtrate B is caustic soda solution. g of activated carbon, stirred and decolorized for 0.5 hours under micro-boiling conditions, cooled and filtered to obtain a colorless and transparent filtrate, and then evaporated and concentrated under normal pressure to obtain 147.5g of colorless and transparent 30% caustic soda, and waste activated carbon was mixed as fuel for incineration. ;

[0038] (2) Add filter residue A to a 1000mL four-neck flask equipped wi...

Embodiment 3

[0041] A resourceful treatment method for carbide slag, the treatment method comprising the following steps:

[0042] (1) Add 200g of calcium carbide slag with a water content of 20% to a 2000mL four-neck flask equipped with a stirrer, reflux condenser and constant pressure funnel, then add 136g of water and 375g of sodium carbonate solution with a concentration of 30% by weight, and After stirring and reacting at 95°C for 0.5 hours, cool and filter to obtain bright yellow filtrate B and off-white filter residue A. The resulting filtrate B is caustic soda solution. g of activated carbon, stirred and decolorized for 0.5 hours under micro-boiling conditions, cooled and filtered to obtain a colorless and transparent filtrate, and then evaporated and concentrated under normal pressure to obtain 287.5g of colorless and transparent 30% caustic soda, and waste activated carbon was mixed as fuel for incineration. ;

[0043] (2) Add filter residue A to a 3000mL four-neck flask equippe...

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Abstract

The invention discloses a recycling method of carbide slag, which comprises the following steps of: (1) reacting the carbide slag with the solution of sodium carbonate and filtering the reaction solution to obtain filtrate B and filter residue A, wherein the filtrate B is the solution of sodium hydroxide; (2) adding the filtrate A into hydrochloric acid, heating the mixture till the mixture boilsto perform a reaction, filtering the reaction solution to obtain a filter residue C and a filtrate D, wherein the filter residue C is used as clinker for cement production; and (3) adding hydrogen peroxide into the filtrate D to perform a reaction for 10 and 20 minutes, adjusting pH value of the reaction solution to 8.5 and 9.0 by using saturated lime water, filtering the reaction solution, drying the filter residue to obtain ferric hydroxide, concentrating the filtrate to precipitate a calcium chloride dehydrate solid, processing the obtained concentrated residual liquid by using the solution of sodium carbonate, filtering the mixed solution to obtain a solid mixture of magnesium carbonate and calcium carbonate, reacting the mixture react with the solution of sulphuric acid and filteringthe reaction solution to obtain calcium sulphate solids and the solution of magnesium sulfate. The resource processing method for the carbide slag has the advantages of various byproducts, high product quality, simple process flow, small equipment investment, easy operation, mild reaction conditions, low production cost, environmental friendliness and wide application prospect.

Description

Technical field [0001] The present invention is a technology field of chemical waste, and it involves a resource -based treatment method of a stone residue. Background technique [0002] Corporal slag is the water -containing residue after the production of acetylene.As an important chemical raw material, electric stones are widely used in the production of PVC, cloty rubber, Vinon, lime nitrogen, and soluble acetylene.At present, my country ’s annual consumption of more than 3 million tons of electric stones is consumed, and nearly 5 million tons of electric stabs are generated. Among them, the most use of electric stones is the production of PVC and club rubber industries.Every 1T PVC produced, 1.5 to 2T of the stone residue will be discharged, and each 1T chopine rubber is produced to discharge 3.2T of the stone residue.Electric stabs have large water content, high alkali, and pH value can reach 14, which is one of the industrial wastes that seriously pollute the environment a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24C04B7/38
CPCY02P40/10
Inventor 王树立夏鸿飞侯家涛王思红范伟莉曾东阳吴江钊王倚天
Owner 开封新巨源环保科技开发有限公司
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