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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1

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

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

[0015] The filtrate obtained by filtering in the CB, after being naturally cooled to room temperature, slowly add concentrated sulfuric acid to the filtrate at a stirring speed of 400 rpm until no precipitation is formed, then stop adding concentrated sulfuric acid, and continue to stir and react for 0.5 hours at room temperature. After 2 hours, filter, wash the filter residue to neutrality, and obtain calcium sulfate product after drying.

[0016] The sample is a...

Example Embodiment

[0017] Example 2

[0018] A. Add 380g of 8% nitric acid solution in the beaker, at room temperature, stir at 450rpm, add 20g of yellow phosphorous slag finely ground to 80 mesh, then at 95℃, stir at 450rpm with stirring speed 4 hour;

[0019] B. Filter the solution obtained in A, wash the filter residue with water to neutrality, then dry it 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 to obtain a white carbon black product;

[0020] The filtrate obtained by filtering in the CB, after being naturally cooled to room temperature, slowly add concentrated sulfuric acid to the filtrate at a stirring speed of 350 rpm until no precipitation is formed, then stop adding concentrated sulfuric acid, and continue to stir and react for 0.7 hours at room temperature. Filter after 1 hour, wash the filter residue to neutrality, and obtain calcium sulfate product after drying.

[0021] The sample is analyzed, and the white carbon black product c...

Example Embodiment

[0022] Example 3

[0023] A. Add 300g of 15% nitric acid solution to the beaker, at room temperature, at a stirring speed of 500rpm, add 20g of yellow phosphorus slag that has been finely ground to 120 mesh, and then at 75°C, at a stirring speed of 500rpm, and 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, and then calcinate at 650°C for 0.5 hours, take it out and cool, and grind to obtain a white carbon black product;

[0025] The filtrate obtained by filtering in the CB, after being naturally cooled to room temperature, slowly add concentrated sulfuric acid to the filtrate at a stirring speed of 500 rpm until no precipitation is formed, then stop adding concentrated sulfuric acid, and continue to stir and react for another 0.3 hours at room temperature. After 3 hours, filter, wash the filter residue to neutrality, and obtain calcium sulfate product after drying.

[0026] The sampl...

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PUM

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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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