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Non-delayed coagulation phosphorus slag powder for cement-based material and preparation method thereof

A technology of slow-setting phosphorus slag powder and cement-based materials, which is applied in the field of building materials and can solve the problems that the setting time of cement is greatly affected and the improvement effect of phosphorus slag is not obvious.

Pending Publication Date: 2022-02-18
SINOHYDRO BUREAU 7 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of treatment technology has the problem of less reaction of fluorine and phosphorus, and the insoluble fluorine and phosphorus compounds produced still have a great influence on the setting time of cement. Therefore, the improvement effect of the products made by this kind of method on phosphorus slag is not obvious

Method used

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  • Non-delayed coagulation phosphorus slag powder for cement-based material and preparation method thereof
  • Non-delayed coagulation phosphorus slag powder for cement-based material and preparation method thereof

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preparation example Construction

[0023] The invention provides a preparation method of non-retardation phosphorus slag powder for cement-based materials, comprising the following steps:

[0024] S1, wet grinding the water-quenched phosphorus slag, the water-quenched phosphorus slag used in the present invention is produced in Ya'an, Sichuan, and has a water content of 30-40%, a glass body content > 90%, a fluoride ion content of 2.1%, and a phosphate ion content of 1.8%. , obtained by mixing phosphate rock, coke and silica uniformly, eutectic melting at 1400-1500 °C, and water quenching. The water-quenched phosphorus slag is ground by a vertical mill to obtain the original phosphorus slag powder. The obtained original phosphorus slag powder has a 45μm negative pressure sieve residue ﹤10%, an average particle size ﹤45μm, and a specific surface area of ​​350-600m 2 / kg.

[0025] S2, according to the mass ratio of original phosphorus slag powder, anion scavenger and water to be 100: (2~6): (100~200) ratio to w...

Embodiment 1

[0029] The present embodiment provides a preparation method of non-retardation phosphorus slag powder for cement-based materials, comprising the following steps:

[0030] S1. Take 100 parts of water-quenched phosphorus slag and wet-grind the water-quenched phosphorus slag to obtain original phosphorus slag powder.

[0031] S2. Blend 100 parts of original phosphorus slag powder with 3 parts of fatty acid and 200 parts of water, and add 1 part of sodium hydroxide to adjust the pH value of the mixed solution to 13.

[0032]S3. Stir the mixed solution in a water bath at 45°C for 1 hour, separate the foam generated on the upper surface of the mixed solution during the stirring process, then use a vacuum filter to filter the mixture, and dry it in an oven at 105°C to obtain Retarded Phosphorus Slag Powder.

Embodiment 2

[0034] The difference between the present embodiment and the first embodiment mainly lies in: S2 in the present embodiment blends 100 parts of original phosphorus slag powder with 6 parts of oleic acid and 200 parts of water, and adds 1 part of potassium hydroxide to adjust the pH value of the mixed solution. To 13, stir in S3 at 45°C for 2 hours, separate the upper layer of foam, and obtain non-retarding phosphorus slag powder after suction filtration and drying.

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Abstract

The invention discloses retarding-free phosphorus slag powder for a cement-based material and a preparation method thereof and belongs to the technical field of building materials. The method comprises the following steps: carrying out wet grinding on the water-quenched phosphorus slag, mixing and stirring the water-quenched phosphorus slag, an anion capturing agent, water and an alkaline regulator, removing foam during stirring, and filtering and drying the mixture to obtain the water-quenched phosphorus slag. Through treatment and preparation of the phosphorus slag powder, the problem of delayed coagulation of the phosphorus slag powder on a cement-based material can be effectively solved, and the current situation that the phosphorus slag powder is poor in early strength is improved. The preparation method is simple in process, the use amount of various auxiliaries is extremely low, and the influence on the production cost of the phosphorus slag powder is extremely small; therefore, the method has wide applicability and excellent economic benefits in production practice.

Description

technical field [0001] The invention relates to a non-retarding phosphorous slag powder for cement-based materials and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] Phosphorus slag powder is an industrial by-product obtained from phosphate rock as raw material, coke and silica as auxiliary agents, and after co-melting, water quenching, grinding and other processes. The high vitreous content (>90%) in phosphorus slag powder makes it have high pozzolanic activity, so it is widely used in the production and preparation of cement-based building materials such as mortar and concrete. However, in the process of using phosphorus slag powder, due to the medium and high content of fluorine and phosphorus compounds in phosphorus slag powder, as well as the chemical composition characteristics of high silicon, calcium and low aluminum in its glass body, it is mixed in the production of cement-based building materi...

Claims

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Application Information

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IPC IPC(8): C04B20/02C04B18/04
CPCC04B20/026C04B18/0427C04B20/023Y02W30/91
Inventor 解悦丁建彤许文英雷英强唐毅龚英何建军黄印
Owner SINOHYDRO BUREAU 7 CO LTD
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