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Steel slag-based multi-metal composite phosphate cement

A composite phosphate and multimetal technology, applied in the field of steel slag-based multimetal composite phosphate cement, can solve the problems of ineffective utilization of steel slag, potential safety hazards, immature technology, etc., to improve the solidification speed and improve the operability sex, and the effect of expanding application prospects

Inactive Publication Date: 2020-07-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although steel slag can be used in metallurgy, agricultural applications, marine applications, etc., its application in the above fields is limited due to immature technology and potential safety hazards.
At present, the use of steel slag to prepare building materials has become the first choice for bulk utilization, but because steel slag contains a large amount of calcium-silicon solid solution, magnesium-iron phase, calcium-iron phase and a certain amount of P 2 o 5 And free calcium oxide, magnesium oxide, resulting in steel slag can not be effectively used in the traditional Portland cement field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The slag-based multi-metal composite phosphate cement of Benxi Steel is composed of 100g of steel slag, 16g of ammonium dihydrogen phosphate, and 1g of borax; the steel slag is ground and passed through a 120-mesh sieve, and the sieve residue is less than 5%. The XRD diagram of the steel slag is shown in figure 1 ;

[0019] (2) Weigh the mixed material in step (1), add 23.4g of water, mix and stir for 3 minutes, quickly pour it into a 20mm×20mm×20mm six-unit mold, and vibrate on a vibration table to form a steel slag-based multi-metal composite Phosphate cement sample; the sample was demolded after 3 hours of molding, and its compressive strength was tested by natural curing to a certain age; the compressive strength of the sample 1d was 21.8MPa; XRD phase analysis was carried out on the material, and the results are shown in figure 2 , It can be seen from the figure that the material contains calcium-silicon solid solution and RO phase.

Embodiment 2

[0021] (1) The slag-based multi-metal composite phosphate cement of Benxi Steel is composed of 100g of steel slag, 25g of ammonium dihydrogen phosphate, and 2g of borax; the steel slag is ground and passed through a 120-mesh sieve, and the sieve residue is less than 5%;

[0022] (2) Weigh the mixed material in step (1), add 25.6g of water, mix and stir for 3 minutes, quickly pour it into a 20mm×20mm×20mm six-unit mold, and vibrate on a vibration table to form a steel slag-based multi-metal composite Phosphate cement sample; the sample was demolded after 3 hours of molding, and its compressive strength was tested by natural curing to a certain age; the compressive strength of the sample 1d was 20.4MPa.

Embodiment 3

[0024] (1) The slag-based multi-metal composite phosphate cement of Benxi Steel is composed of 100g of steel slag, 45g of ammonium dihydrogen phosphate, and 4g of borax; the steel slag is ground and passed through a 120-mesh sieve, and the sieve residue is less than 5%;

[0025] (2) Weigh the mixed material in step (1), add 30g of water, mix and stir for 3 minutes, quickly pour it into a 20mm×20mm×20mm six-unit mold, and vibrate on a vibrating table to form a steel slag-based multi-metal composite Phosphate cement sample; the sample was demolded after 3 hours of molding, and its compressive strength was tested by natural curing to a certain age; the compressive strength of the sample 1d was 20.2MPa.

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Abstract

The invention discloses steel slag-based multi-metal composite phosphate cement, and belongs to the technical field of rapid repair building materials. The cement is prepared from the following raw materials in parts by weight: 100 parts of steel slag, 15-50 parts of phosphate and 1-5 parts of retarder, when in use, the cement material is stirred and mixed with water, and has the excellent properties of the controllable setting speed, the high early strength, the high low-temperature setting speed, the small volume deformation, the wide environmental adaptability, strong wear resistance, goodfrost resistance and the like; and the phosphate cement is prepared from composite metal substances in the steel slag, so that the material preparation cost is reduced, a new way is provided for efficient resource utilization of the steel slag, and the method has certain environmental protection and economic benefits.

Description

technical field [0001] The invention relates to a steel slag-based multi-metal composite phosphate cement, which belongs to the technical field of rapid repair building materials. Background technique [0002] Steel slag is the waste slag discharged during the steelmaking process, and the discharge amount is generally 10% to 15% of the crude steel output; as the main by-product of steel production, the annual output of steel slag in my country has exceeded 100 million tons, but the utilization rate is less than 30%; As of 2018, the stockpile of steel slag has reached 300 million tons. Regarding the treatment of steel slag, my country has mainly gone through three stages: 1950-1970 was in the storage stage, and the utilization rate of steel slag was almost zero; 1980-2005 was in the rough development stage, but due to poor utilization effect, the utilization rate of steel slag was almost zero. Less than 10%; Since 2005, it has been in the comprehensive utilization stage, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B12/02
CPCC04B12/027
Inventor 罗中秋马越周新涛母维宏王路星邵周军
Owner KUNMING UNIV OF SCI & TECH
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