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Method for preparing calcium carbonate from yellow phosphorus furnace slag to co-produce industrial salt and silicon gel

A technology for yellow phosphorus slag and calcium carbonate is applied in the field of preparing calcium carbonate to co-produce industrial salt and silica gel, and achieves the effects of large market demand, low production cost and elimination of chemical waste residues

Inactive Publication Date: 2010-09-29
南通欣宇光肠衣有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no relevant report on the method of using yellow phosphorus slag to prepare calcium carbonate and co-produce sodium chloride and anhydrous partial silicon

Method used

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  • Method for preparing calcium carbonate from yellow phosphorus furnace slag to co-produce industrial salt and silicon gel
  • Method for preparing calcium carbonate from yellow phosphorus furnace slag to co-produce industrial salt and silicon gel
  • Method for preparing calcium carbonate from yellow phosphorus furnace slag to co-produce industrial salt and silicon gel

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Effect test

Embodiment 1

[0042]A method for preparing calcium carbonate co-production industrial salt and silica gel by using yellow phosphorus slag, including the purification and synthesis process of yellow phosphorus slag and the process of synthesizing silica gel;

[0043] The process of purifying and synthesizing the yellow phosphorus slag is as follows: 300 kg of pure calcium oxide in the converted yellow phosphorus slag and hydrochloric acid solution are placed in the purifier 1 to react according to the mass ratio of pure substances of 1:1.1, and then the reaction After the material obtains clarified 501.78kg calcium chloride solution and silica filter cake through the first suction filter 2 suction filtration;

[0044] Wherein, the clarified calcium chloride solution and sodium carbonate are put into the synthesizer 3 according to the mass ratio of pure substances of 1:0.76, and the chemical reaction is carried out under gentle stirring, and then the reacted substance is filtered through the s...

Embodiment 2

[0047] A method for preparing calcium carbonate co-production industrial salt and silica gel by using yellow phosphorus slag, including the purification and synthesis process of yellow phosphorus slag and the process of synthesizing silica gel;

[0048] The process of purifying and synthesizing the yellow phosphorus slag is as follows: 300 kg of pure calcium oxide in the converted yellow phosphorus slag and hydrochloric acid solution are placed in the purifier 1 to react according to the mass ratio of pure substances of 1:1.3, and then the reaction After the material obtains clarified 593.01kg calcium chloride solution and silica filter cake through first suction filter 2 suction filtration;

[0049] Wherein, the clarified calcium chloride solution and sodium carbonate are put into the synthesizer 3 according to the mass ratio of pure substances of 1:0.96, and the chemical reaction is carried out under gentle stirring, and then the reacted substance is filtered through the seco...

Embodiment 3

[0052] A method for preparing calcium carbonate co-production industrial salt and silica gel by using yellow phosphorus slag, including the purification and synthesis process of yellow phosphorus slag and the process of synthesizing silica gel;

[0053] The process of purifying and synthesizing the yellow phosphorus slag is as follows: 300 kg of pure calcium oxide in the converted yellow phosphorus slag and hydrochloric acid solution are placed in the purifier 1 to react according to the mass ratio of pure substances of 1:1.5, and then the reaction After the material obtains clarified 648.25kg calcium chloride solution and silica filter cake through first suction filter 2 suction filtration;

[0054] Wherein, the clarified calcium chloride solution and sodium carbonate are put into the synthesizer 3 according to the mass ratio of pure substance 1: 1.16, carry out the chemical reaction under gentle stirring, and then the reacted substance is filtered through the second suction f...

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Abstract

The invention relates to the technical field of chemical engineering three-waste control and utilization, in particular to a method for preparing calcium carbonate from yellow phosphorus furnace slag to co-produce industrial salt and silicon gel. The method comprises the following steps: generating calcium chloride through reaction between hydrochloric acid and calcium oxide in the yellow phosphorus furnace slag; then, carrying out reaction with sodium carbonate to obtain clear sodium chloride solution and calcium carbonate filter cake through suction filtration; obtaining the sodium silicate through the reaction between the rest silicon dioxide of the yellow phosphorus furnace slag and the sodium carbonate; and obtaining the silicon gel and the sodium chloride products through the reaction between the sodium silicate and the hydrochloric acid. The invention has the advantages of low production cost, high benefits, large market requiring amount and simple process and production equipment, and belongs to a practical treatment and utilization method. The method eliminates the chemical waste slag, controls the environment pollution, and can also create considerable economic value.

Description

technical field [0001] The invention belongs to the technical field of treatment and utilization of three chemical wastes, in particular to a method for preparing calcium carbonate co-production industrial salt and silica gel by using yellow phosphorus slag. Background technique [0002] Yellow phosphorus slag is industrial waste slag discharged from yellow phosphorus factories: 8 to 10 tons of yellow phosphorus slag are discharged for every ton of yellow phosphorus produced. At present, the discharge of yellow phosphorus slag in my country is more than 2 million tons, which has not been effectively utilized for a long time. As industrial waste piled up like a mountain. Because the yellow phosphorus slag contains a small amount of phosphate ions and fluoride ions, it will gradually dissolve in the rainwater and penetrate into the ground, seriously polluting the environment. [0003] Yellow phosphorus slag is an industrial by-product of the production of yellow phosphorus fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01D3/04C01B33/14
Inventor 王嘉兴
Owner 南通欣宇光肠衣有限公司
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