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Comprehensive utilization method of yellow phosphorus furnace slag

A yellow phosphorus slag and purpose technology, which is applied in the field of comprehensive utilization of yellow phosphorus slag, can solve the problems of high production cost, complex white carbon black process, and inability to achieve comprehensive utilization of yellow phosphorus slag, so as to reduce production cost and realize circular economy And the effect of energy saving, emission reduction and pollution reduction

Inactive Publication Date: 2010-10-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems that the yellow phosphorus slag cannot be comprehensively utilized, the production of white carbon black is complicated in process, and the production cost is high, the present invention provides a comprehensive utilization method of the yellow phosphorus slag, which is realized through the following technical solutions:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A. Adding 350 g of nitric acid solution with a concentration of 10% in a beaker, at room temperature and a stirring speed of 300 rpm, adding 20 g of yellow phosphorus slag ground to 100 mesh, and then stirring for 5 hours at 100 ° C and a stirring speed of 300 rpm;

[0014] B. Filter the solution obtained in A, wash the filter residue with water to neutrality, then dry at 120°C for 1.5 hours, then calcinate at 750°C for 0.5 hour, take it out and cool it, grind it finely to get the white carbon black product;

[0015] The filtrate obtained by filtering in C.B, after natural cooling to room temperature, in the filtrate, at a stirring speed of 400rpm, slowly add concentrated sulfuric acid until no precipitate is formed, then stop adding concentrated sulfuric acid, continue to stir and react at room temperature for 0.5 hours, and let it stand Filter after 2 hours, wash the filter residue until neutral, and dry to obtain the calcium sulfate product.

[0016] The sample was a...

Embodiment 2

[0018] A. Add 380g of nitric acid solution with a concentration of 8% in a beaker, at room temperature, with a stirring speed of 450rpm, add 20g of yellow phosphorus slag ground to 80 meshes, then at 95°C, with a stirring speed of 450rpm, stir for 4 Hour;

[0019] B. Filter the solution obtained in A, and wash the filter residue with water to neutrality, then dry at 100°C for 2.0 hours, then calcinate at 700°C for 0.75 hours, take it out and cool it, and grind it finely to obtain the white carbon black product;

[0020] The filtrate obtained by filtering in C.B, after natural cooling to room temperature, in the filtrate, at a stirring speed of 350rpm, slowly add concentrated sulfuric acid until no precipitation is formed, then stop adding concentrated sulfuric acid, continue to stir and react at room temperature for 0.7 hours, and let it stand Filter after 1 hour, wash the filter residue until neutral, and dry to obtain the calcium sulfate product.

[0021] The sample was ana...

Embodiment 3

[0023] A. Add 300g of nitric acid solution with a concentration of 15% in a beaker, at room temperature, with a stirring speed of 500rpm, add 20g of yellow phosphorus slag ground to 120 mesh, then at 75°C, with a stirring speed of 500rpm, stir for 3 Hour;

[0024] B. Filter the solution obtained in A, and wash the filter residue with water to neutrality, then dry at 150°C for 1.0 hour, then calcinate at 650°C for 0.5 hour, take it out and cool it, grind it finely to get the white carbon black product;

[0025] The filtrate obtained by filtering in C.B, after natural cooling to room temperature, in the filtrate, at a stirring speed of 500rpm, slowly add concentrated sulfuric acid until no precipitate is formed, then stop adding concentrated sulfuric acid, continue to stir and react at room temperature for 0.3 hours, and let it stand Filter after 3 hours, wash the filter residue until neutral, and dry to obtain the calcium sulfate product.

[0026] The sample was analyzed and t...

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Abstract

The invention provides a comprehensive utilization method of yellow phosphorus furnace slag. The method comprises the following steps of: adding yellow phosphorus furnace slag porphyrized to 80-120 meshes to a nitric acid solution the mass concentration of which is 5-20 percent to ensure that the mass ratio of solid to liquid is 1:(10-19); stirring for reacting and then filtering; washing, drying and calcining filter residues to obtain white carbon black; reacting filter liquid with sulfuric acid and then filtering; and drying the filter residues to obtain calcium sulfate, wherein the filter liquid can be recycled. In the invention, an effective approach capable of utilizing main constituents of Si and Ca in the yellow phosphorus furnace slag is developed, and the white carbon black the SiO2 content of which reaches 99 percent and a high-quality calcium sulfate product the CaSO4 content of which reaches 99 percent, which can meet the requirement of the market, are produced. The method not only can sufficiently utilize the yellow phosphorus furnace slag which is an industrial waste and change the waste into valuable things, but also is beneficial to reducing the pollution of the yellow phosphorus furnace slag to the environment, and meanwhile, the method can reduce the production cost of the while carbon black and the calcium sulfate to realize circular economy as well as save energy and reduce emissions.

Description

technical field [0001] The invention relates to a comprehensive utilization method of yellow phosphorus slag, which belongs to the field of solid waste utilization in the chemical industry. Background technique [0002] Yellow phosphorus slag is the solid waste produced when industrial yellow phosphorus is produced by using phosphate rock, silica, coke, etc. Phosphorus slag. According to the current production status of yellow phosphorus in my country, my country's yellow phosphorus enterprises produce about 6-7 million tons of yellow phosphorus slag every year. Yellow phosphorus slag is water-quenched when it is discharged from the electric furnace, and the particle size is between 0.5 and 1.5mm. However, most of the yellow phosphorus enterprises are distributed in areas with large land and sparsely populated areas that are close to phosphate mines, with steep slopes and concentrated rainwater. During the heavy rain, a large amount of yellow phosphorus slag flowed into th...

Claims

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Application Information

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IPC IPC(8): C01B33/12C01F11/46B09B3/00
Inventor 苏毅马艳丽查坐统李国斌
Owner KUNMING UNIV OF SCI & TECH
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