Modified phosphorus slag powder, and preparation method and application thereof

A phosphorous slag powder and modification technology, applied in cement production and other directions, can solve the problems of slow strength development and low early strength, and achieve the effects of saving production costs, improving density, and increasing comprehensive utilization.

Inactive Publication Date: 2016-06-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to propose an improvement that can effectively stimulate the activity of phosphorus slag powder and solve the problems of slow setting, low early strength and slow strength development of cement concrete products caused by the incorporation of phosphorus slag powder. Non-toxic phosphorus slag powder and its preparation method and application

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  • Modified phosphorus slag powder, and preparation method and application thereof
  • Modified phosphorus slag powder, and preparation method and application thereof
  • Modified phosphorus slag powder, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After the coarse phosphorus slag and desulfurized gypsum are pulverized, take phosphorus slag powder, metakaolin, desulfurized gypsum and calcium oxide according to the weight ratio of 100:15:5:5, mix the phosphorus slag powder, desulfurized gypsum and metakaolin to obtain a slurry, and then Grind into a slurry in a wet mill, press filter to form a cake, and then spray-dry the powdery material, then mix the spray-dried powder and calcium oxide evenly, and then use DC series rotary vibrating sieve to sieve and fine the mixed material Degree detection, the sieve residue is 5%. The prepared modified phosphorus slag replaces the mass fraction of cement at 25, 30%, and 35%, and the cement, modified phosphorus slag powder and sand are put into a mixer for dry mixing and homogenization. The water-cement ratio of the mortar is 0.5, and the mortar-sand ratio is 1:3. The performance results of the mortar experiment are shown in Table 1:

[0021] Table 1 embodiment performance t...

Embodiment 2

[0025] After pulverizing the coarse phosphorus slag and desulfurized gypsum, take phosphorus slag powder, metakaolin, desulfurized gypsum and calcium oxide according to the weight ratio of 100:20:5:3, and mix the coarse phosphorus slag, desulfurized gypsum, metakaolin and water at a ratio of 1: 1 After mixing, the slurry is obtained, and then ground into a slurry in a wet mill, press-filtered into a cake, and then spray-dried into a powder material, and then the spray-dried powder and calcium oxide are mixed evenly, and then the DC series rotary vibrating sieve is used The sieve material and fineness test of the mixed material, the sieve residue is 5%. The mass fraction of the prepared modified phosphorous slag replacing the cement is 25%, 30%, 35%. Put the cement, modified phosphorus slag powder and sand into the mixer for dry mixing and homogenization. The water-cement ratio of the mortar is 0.5, and the mortar-sand ratio is 1:3. The performance results of the mortar experi...

Embodiment 3

[0029] After pulverizing the coarse phosphorus slag and desulfurized gypsum, take phosphorus slag powder, metakaolin, desulfurized gypsum and calcium oxide according to the weight ratio of 100:20:8:4, and mix the coarse phosphorus slag, desulfurized gypsum, metakaolin and water at a ratio of 1: 1 After mixing, the slurry is obtained, and then ground into a slurry in a wet mill, press-filtered into a cake, and then spray-dried into a powder material, and then the spray-dried powder and calcium oxide are mixed evenly, and then the DC series rotary vibrating sieve is used The sieve material and fineness test of the mixed material, the sieve residue is 5%. Weigh and mix well by belt conveyor. Then use the DC series rotary vibrating screen to test the sieve material and fineness of the mixed material, and the sieve residue is 5%. The prepared modified phosphorus slag powder replaces the cementitious material with a mass fraction of 30%. The cement and the modified phosphorus slag ...

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Abstract

The invention relates to a modified phosphorus slag powder, and a preparation method and application thereof. The modified phosphorus slag powder is composed of the following components in parts by mass: 100 parts of phosphorus slag powder, 5-20 parts of metakaolin, 5-10 parts of desulfurized gypsum and 5-10 parts of calcium oxide. The preparation method comprises the following steps: S1. pulverizing the phosphorus slag powder and desulfurized gypsum, mixing the pulverized phosphorus slag powder and desulfurized gypsum with the metakaolin and water according to the parts by weight to obtain a slurry, and grinding the slurry in a wet grinding mill to obtain a slurry material; S2. carrying out pressure filtration on the slurry material to obtain a cake, and carrying out spray drying to obtain a powdery material; and S3. uniformly mixing the spray drying powder obtained in the step S2 with the calcium oxide according to the required parts by weight, and screening the mixture through a 45-micrometer sieve, wherein the residue quantity is at most 10%. The preparation method of the modified phosphorus slag powder is simple, is low in cost, and can promote the massive application of the phosphorus slag powder in cement industry and concrete industry.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a modified phosphorus slag powder and its preparation method and application. Background technique [0002] Yellow phosphorus slag is a molten material with calcium silicate as the main component obtained during the production of yellow phosphorus by the electric furnace method, which is granulated waste slag after quenching. Usually, about 8-10 tons of yellow phosphorus slag is produced for every ton of yellow phosphorus produced in the process of producing yellow phosphorus by electric furnace, which causes the annual discharge of yellow phosphorus slag to be as high as several million tons, but most of them are in the In the open-air stacking state, this not only wastes resources, occupies cultivated land, pollutes the environment, and hinders the sustainable development of the yellow phosphorus production industry, but also is extremely inconsistent with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B5/06C04B28/00
CPCC04B5/06C04B7/243C04B28/00C04B18/0481C04B14/00Y02P40/10
Inventor 王桂明吴振华包明水中和
Owner WUHAN UNIV OF TECH
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