High-early-activity phosphorus slag powder and preparation method thereof

A technology of active phosphorus and phosphorus slag powder, which is applied in cement production, etc., can solve the problems of low early pozzolan activity, low early activity improvement, and late activity loss, etc., to reduce the shielding effect, enhance ion migration ability, and binding ability weak effect

Pending Publication Date: 2022-01-14
SINOHYDRO BUREAU 7 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the technical route of the above technologies is to modify the phosphorus slag by inhibiting the influence of fluorine and phosphorus, alkali or sulfate excitation, etc., which often has a large loss of activity in the later stage, low activity improvement in the early stage, and the introduction of more harmful ions. The disadvantages such as high cost cannot fundamentally solve the disadvantages of low pozzolanic activity in the early stage determined by the structural characteristics of the phosphorus slag powder glass itself with a high calcium / silicon ratio

Method used

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  • High-early-activity phosphorus slag powder and preparation method thereof
  • High-early-activity phosphorus slag powder and preparation method thereof

Examples

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preparation example Construction

[0024] The invention provides a method for preparing phosphorus slag powder with high early activity. The preparation process includes: mixing phosphate rock, silica, coke and a vitreous structure regulator to form a mixture, wherein the vitreous structure regulator is an aluminum-containing raw material or a magnesium-containing material Raw materials, aluminum-containing raw materials are one or more of aluminum ore, bauxite, aluminum ash or aluminum slag, and magnesium-containing raw materials are one or more of magnesite, dolomite or serpentine. The mixture here may also include a vitreous network regulator, and the vitreous network regulator is any one or more of alkali metal oxides, hydroxides, sulfates, carbonates or chlorides. Preferably, for the phosphorus slag powder product used in reinforced concrete structures, the phosphorus slag powder produced with alkali metal chloride salt as the vitreous network regulator is not used, and the vitreous network regulator is an ...

Embodiment 1

[0042] This embodiment provides a method for preparing early active phosphorus slag powder, first drying each raw material, and controlling the moisture content of each raw material to 2 o 3 , The content of MgO accounts for 10% of the total amount of raw materials except coke. The prepared raw materials were blended, then put into an electric furnace and heated to 900°C for 5 minutes, and then heated to 1400°C for 30 minutes to obtain a phosphorus slag melt. The phosphorus slag melt is discharged into saturated lime water with a pH value of 13 to obtain granular, loose and porous water-quenched phosphorus slag, and the water-quenched phosphorus slag is placed in a dry environment for draining treatment. Put the drained water-quenched phosphorus slag into a vertical mill for grinding, and use the waste heat of the electric furnace to dry it synchronously, and then use the wind separation process to wind it.

Embodiment 2

[0044] The difference between this example and Example 1 is that the raw materials used in this example are: 100 parts of phosphate rock, 25 parts of coke, 36 parts of magnesite and 39 parts of silica, after blending the raw materials with a moisture content of <1% , put into an electric furnace and heat up to 900° C. for 10 minutes, and continue to heat up to 1400° C. for 30 minutes to obtain a phosphorus slag melt. The subsequent treatment is the same as in Example 1.

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Abstract

The invention discloses high-early-activity phosphorus slag powder and a preparation method thereof, and belongs to the technical field of inorganic cementing materials. The preparation method comprises the following steps: mixing phosphate ore, silica, coke and a glass body structure regulator to form a mixture, heating the mixture to 800-900 DEG C, keeping the temperature for 5-10 minutes, then continuously heating to 1300-1400 DEG C for co-melting, and carrying out water quenching treatment on molten slag after co-melting. The prepared phosphorus slag powder has the advantage of high early activity, the preparation method is simple, the energy consumption in the technological process is low, and the economic benefit of preparation is improved.

Description

technical field [0001] The invention relates to a high-early activity phosphorus slag powder and a preparation method thereof, belonging to the technical field of inorganic gelling materials. Background technique [0002] Phosphorus slag powder is an industrial by-product obtained from phosphate rock as raw material, with coke and silica as additives, and after eutectic, 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 preparation of concrete. [0003] Phosphorus slag powder is generally used in concrete as follows: 1. Completely or partially replace traditional admixtures such as fly ash, mineral powder, silica fume, etc. Regions with a steady supply of quality admixtures. 2. Partial replacement of cement in the same amount. This method is mainly used in areas with high cement prices. Using the characteristics of high late activity of phosphorus ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/14
CPCC04B7/14Y02P40/10
Inventor 解悦丁建彤龚英雷英强唐毅黄印许文英何建军
Owner SINOHYDRO BUREAU 7 CO LTD
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