Baking-free brick containing desulfurization slag and steel slag

A technology of desulfurization slag and unburned bricks, which is applied in the field of construction materials and can solve problems such as comprehensive utilization doubts

Pending Publication Date: 2021-05-28
江苏瑜工环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The domestic application of dry desulfurization slag is still in its infancy, and there are still doubts about its comprehensive utilization

Method used

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  • Baking-free brick containing desulfurization slag and steel slag
  • Baking-free brick containing desulfurization slag and steel slag
  • Baking-free brick containing desulfurization slag and steel slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1, desulfurization slag plus steel slag to prepare unfired bricks (19 / 10 / 26).

[0034] A 250-ton static brick machine is used to press 200x100x55mm Dutch bricks, and the average pressure is about 15-17kgf / cm 2 . The material formula takes each component according to the following weight: desulfurization slag 26, fly ash 3, 425 cement 13, water-quenched slag powder 16, steel slag 42, and the particle size of steel slag is controlled below 3mm;

[0035] Stir the desulfurization slag, fly ash, water-quenched slag powder and other powder materials evenly first, then add water and stir, then add steel slag and stir evenly, the water-powder ratio is 0.33. The stirring time should be moderate (the mixing time is too long, the humidity of the mixture will increase and form large clumps, which is not conducive to the formation of fabrics and pressed bricks), and it will be cured at room temperature with a humidity of 65-95% for 28 days.

[0036] Due to the retarding ef...

Embodiment 2

[0037] Example 2, desulfurization slag plus steel slag to prepare unburned bricks (19 / 12 / 9).

[0038] A 250-ton static brick machine is used to press 200x100x55mm Dutch bricks, and the average pressure is about 15-17kgf / cm 2 . The material formula takes each component according to the following weight: desulfurization slag 28, fly ash 3.5, 425 cement 7, water-quenched slag powder 18, steel slag 43.3, silicon-aluminum additive 0.2, and the particle size of steel slag is controlled below 3mm;

[0039] Stir the desulfurization slag, fly ash, water-quenched slag powder and other powder materials evenly first, then add water and stir evenly, then add steel slag and stir evenly, the water-powder ratio is 0.28. The stirring time should be moderate (the mixing time is too long, the humidity of the mixture will increase and form large clumps, which is not conducive to the formation of fabrics and pressed bricks), and it will be cured at room temperature with a humidity of 65-95% for 2...

Embodiment 3

[0041] Example 3, desulfurization slag plus steel slag to prepare unfired bricks (19 / 12 / 23).

[0042] A 250-ton static brick machine is used to press 200x100x55mm Dutch bricks, and the average pressure is about 15-17kgf / cm 2 . The material formula takes each component according to the following weight: desulfurization slag 27, fly ash 3.2, 425 cement 6.4, water-quenched slag powder 17, steel slag 46.4, and the particle size of steel slag is controlled below 3mm;

[0043] Stir the desulfurization slag, fly ash, water-quenched slag powder and other powder materials first, then add water and stir evenly. When adding water, spray evenly, and add the formula water in a short time, and finally add steel slag and stir evenly. The water-powder ratio is 0.24. The stirring time should be moderate (the mixing time is too long, the humidity of the mixture will increase and form large clumps, which is not conducive to the formation of fabrics and pressed bricks), and it will be cured at r...

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Abstract

The invention discloses a baking-free brick containing desulfurized slag and steel slag, which is prepared from the following materials by weight: 20-35% of desulfurized slag, 3-10% of fly ash, 5-20% of water-quenched slag powder, 5-15% of Portland cement and 20-50% of steel slag, and the desulfurized slag is a main solid waste filler and a volcanic ash activity excitation material. The desulfurization slag, fly ash, water-quenched slag powder, Portland cement and steel slag micro powder are used as curing cementing materials and exciting agents, and one or more of the materials can be combined to meet the requirements of cementing and curing strength and products. The invention relates to the technical field of construction materials, in particular to a baking-free brick containing desulfurization slag and steel slag. The instability influence of calcium sulfite, ettringite and steel slag is reduced, the stability of building materials using related raw materials is improved, and the possible expansion damage influence in the later period can be basically controlled by adding the volcanic ash material and controlling the particle size of the steel slag aggregate to be not larger than 3 mm; the alkalinity and the gelling property of the solid waste and dense filling of aggregate gradation are fully utilized, use of materials such as cement and gravel is reduced, and the cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of construction materials, in particular to burn-free bricks containing desulfurization slag and steel slag. Background technique [0002] In the past, wet desulfurization was used for flue gas desulfurization of sintering machines in steel plants. Not only did the equipment occupy a large area, but it also produced desulfurized gypsum solid waste and wastewater, and the operation and maintenance costs were high. In recent years, more and more steel mills have adopted circulating fluidized bed dry or semi-dry desulfurization for flue gas from sintering machines. This method saves equipment investment, occupies a small area, and does not generate waste water. The dry powder absorbent (calcium oxide or calcium hydroxide) reacts with the sulfur in the flue gas to form calcium sulfate. However, due to the incomplete oxidation reaction of desulfurization, most of the desulfurization products exist in the desulfur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B40/02
CPCC04B28/04C04B2111/00017C04B2201/50C04B18/062C04B18/08C04B18/141C04B18/142C04B40/0259
Inventor 朱天民刘岩
Owner 江苏瑜工环保科技有限公司
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