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Application of an adjusting material for high temperature activation treatment of electric furnace white slag

A high-temperature activation and white slag technology, which is applied in cement production and other fields, can solve the problems of no gelling activity and restrict the utilization of white slag, so as to improve the gelling activity, improve the utilization rate of high value-added resources, and benefit the environment. Effect

Active Publication Date: 2016-06-29
SHAOGUAN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the main silicate mineral phase in white slag is dicalcium silicate, and the main γ-C 2 The existence of S crystal form has almost no gelling activity, which seriously restricts the use of white slag as an auxiliary material in cement concrete

Method used

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  • Application of an adjusting material for high temperature activation treatment of electric furnace white slag
  • Application of an adjusting material for high temperature activation treatment of electric furnace white slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Select the percentage by weight of each component of the adjustment material as follows:

[0016] Converter steel slag 55%

[0017] Calcareous material calculated based on the effective content of CaO 42%

[0018] Auxiliary materials 3%

[0019] The adjustment material is mixed with electric furnace white slag according to the following weight percentage:

[0020] Conditioning material 31%

[0021] White residue 69%

[0022] The mixture is calcined at 1300°C to make the adjustment material and white slag chemically react; after the calcination is completed, it is cooled quickly by air cooling; then it is crushed by a jaw crusher and ground by a ball mill until it reaches Burgundy The specific surface area is 400~500m 2 / kg.

[0023] According to w (reference cement): w (white slag) = 70%: 30% to prepare cementitious materials, according to (GB / T17671-1999) "cement mortar strength test method (ISO method)" to conduct mortar performance tests.

Embodiment 2

[0025] Select the percentage by weight of each component of the adjustment material as follows:

[0026] Converter steel slag 50%

[0027] 50% of calcareous material calculated based on the effective content of CaO

[0028] The adjustment material is mixed with electric furnace white slag according to the following weight percentage:

[0029] Conditioning material 33%

[0030] White residue 67%

[0031] The mixture is calcined at 1300°C to make the adjustment material and white slag chemically react; after the calcination is completed, it is cooled quickly by air cooling; then it is crushed with a jaw crusher and ground with a ball mill until it reaches Burgundy The specific surface area is 400~500m 2 / kg.

[0032] According to w (reference cement): w (white slag) = 70%: 30% to prepare cementitious materials, according to (GB / T17671-1999) "cement mortar strength test method (ISO method)" to conduct mortar performance tests.

Embodiment 3

[0034] Select the percentage by weight of each component of the adjustment material as follows:

[0035] 95% of calcareous materials calculated based on the effective content of CaO

[0036] Auxiliary materials 5%

[0037] The adjustment material is mixed with electric furnace white slag according to the following weight percentage:

[0038] Adjustment material 18%

[0039] White residue 82%

[0040] The mixture is calcined at 1300°C to make the adjustment material and white slag chemically react; after the calcination is completed, it is cooled quickly by air cooling; then it is crushed with a jaw crusher and ground with a ball mill until it reaches Burgundy The specific surface area is 400~500m 2 / kg.

[0041] According to w (reference cement): w (white slag) = 70%: 30% to prepare cementitious materials, according to (GB / T17671-1999) "cement mortar strength test method (ISO method)" to conduct mortar performance tests.

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Abstract

The invention relates to an adjusting material for carrying out high temperature activation treatment on electric furnace white slag. The adjusting material comprises the components by weight: 0-55% of converter slag, 40-100% of calcareous material (in terms of CaO) and 0-5% of auxiliary materials. When the adjusting material is in practical use, the converter slag, the calcareous material and the auxiliary materials are mixed according to the above weight proportions to be used as the adjusting material; the adjusting material is ground into fine powder; 15-35% by weight of the adjusting material and 65-85% by weight of the white slag are mixed uniformly; the mixture is calcined, so that chemical reactions occur among components; air cool or water cool are carried out after calcination; and a calcined product is broken and ground to prepare the activated white slag powder. 28 d activity indicator is higher than 85% when Blaine specific surface area is 400-500 m<2> / kg. Mineral composition of the white slag is optimized essentially; gelatinization activity of the white slag is increased; high value-added resource utilization rate of the white slag and steel slag solid wastes is increased; and environment protection is facilitated.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of electric furnace white slag, and relates to the application of an adjusting material for high-temperature activation treatment of electric furnace white slag, specifically using converter steel slag, calcareous materials and a small amount of auxiliary materials to mix with white slag and then calcining. Make the chemical reaction between the various components, essentially optimize the mineral composition of the white slag, and improve the gelling activity of the white slag. Background technique [0002] Electric furnace white slag refers to the slag formed when carbon powder, ferrosilicon powder and other reducing agents are used for diffusion deoxidation during the reduction period of electric arc furnace steelmaking. It is in the form of white powder after cooling in air. With the development of our country's extra-furnace refining technology, the amount of white slag is i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B5/06C04B7/147
CPCY02P40/10
Inventor 赵旭光贺图升赵三银黎载波蔡惠文
Owner SHAOGUAN COLLEGE
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