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Method using titanium gypsum and acetylene sludge to prepare high-calcium sulphoaluminate or high-sulfur clinkers

A calcium sulfoaluminate and calcium carbide slag technology, applied in clinker production, cement production and other directions, can solve the problems of high drying and frying costs, affecting the color of cement, and decreasing the strength of cement, etc., and achieves good waste treatment benefits. , The effect of reducing drying and grinding energy consumption and low production cost

Active Publication Date: 2012-11-07
长沙紫宸科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is used as a cement retarder after being modified by various methods. On the one hand, it will cause the strength of cement to decrease, and it is easy to produce shrinkage cracks; The cost is high, the quality is unstable, and the storage and landfill treatment is not only difficult to find, but also difficult to seepage control
At present, titanium gypsum sludge is discharged into rivers, depressions, and culverts in large quantities, which has caused serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment includes the following steps:

[0021] (1) Ingredients: The weight percentages of the raw materials for the production of high-calcium sulfoaluminate clinker are: 24% titanium gypsum, 47.4% carbide slag, 17.6% limestone, and 11% corrected raw materials;

[0022] The titanium gypsum is naturally drained titanium gypsum with a water content of 43wt%; carbide slag is calcium carbide slag with a water content of 38wt% after press filtration; the calcium oxide content of limestone is 48wt%, and the magnesium oxide content is 3.9wt%; limestone is used for Substitute part of carbide slag to make up for the deficiency of carbide slag; the composition of the corrected raw materials is (the percentage is based on the total raw material weight): high-alumina cinder 9.8%, fluorite 1.2%; high-alumina cinder contains Al 2 o 3 41wt%;

[0023] Limestone, high alumina cinder and fluorite are ball milled into dry powder;

[0024] (2) Homogenization: Limestone, coal cin...

Embodiment 2

[0029] This embodiment includes the following steps:

[0030] (1) Ingredients: The weight percentages of the raw materials for the production of high-calcium sulfoaluminate clinker are: 27% titanium gypsum, 61% calcium carbide slag, and 12% corrected raw materials;

[0031] The titanium gypsum is titanium gypsum with a water content of 41wt% after press filtration; the calcium carbide slag is a dry process acetylene carbide slag; the composition of the corrected raw materials is (the percentage is based on the total raw material weight): bauxite 4.5%, pulverized coal Ash 4.5%, fluorite tailings 1.5%, dolomite 1.5%;

[0032] Calibration raw materials and coal are ball milled together at a ratio of 12:11 to make dry powder;

[0033] (2) Homogenization: The corrected raw materials and coal are ball milled together to make dry powder, then mixed with titanium gypsum and carbide slag, and homogenized by rolling mixer;

[0034] (3) Calcination: After the raw materials are homogeni...

Embodiment 3

[0038] This embodiment includes the following steps:

[0039] (1) Ingredients: The weight percentages of the raw materials for the production of high-calcium sulfoaluminate clinker are: titanium gypsum 31%, carbide slag 52%, and corrected raw materials 17%;

[0040] The titanium gypsum is titanium gypsum with a moisture content of 27wt% stored in the open air, and the calcium carbide slag is calcium carbide slag with a moisture content of 41wt% after pressure filtration; the composition of the corrected raw materials is (the percentage is based on the total raw material weight): coarse coal ash 7%, 5% high alumina clay, 1.5% waste magnesite, 3.5% fluorite waste residue from ball mill beneficiation;

[0041] Coarse coal ash, high alumina clay, waste magnesite, and anthracite are first pulverized by 4R Raymond mill;

[0042] (2) Homogeneous: Coarse coal ash, high-alumina clay, waste magnesite, and anthracite are pulverized, and then mixed with titanium gypsum, carbide slag, and...

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Abstract

A method using titanium gypsum and acetylene sludge to prepare high-calcium sulphoaluminate or high-sulfur clinkers includes the steps: (1) compounding; (2) homogenizing; and (3) calcining. According to the method using the titanium gypsum and the acetylene sludge to prepare the high-calcium sulphoaluminate or the high-sulfur clinkers, drying and grinding of wet sludge titanium gypsum and the acetylene sludge are omitted, energy consumption in drying and grinding is reduced, the firing temperature is low, firing energy consumption is low, production cost of the clinkers is low, and waste recycling benefits are good.

Description

technical field [0001] The invention relates to a waste utilization method of titanium gypsum, in particular to a method for producing widely used high-calcium sulfoaluminate clinker or high-sulfur clinker by using industrial waste slag titanium gypsum and carbide slag. Background technique [0002] Titanium gypsum is the industrial waste residue of titanium dioxide produced by the sulfuric acid method. It contains a large amount of soluble zinc, lead, cadmium and other heavy metal ions. At present, the annual discharge of titanium gypsum in my country has reached nearly 20 million tons, and the stockpiles in the valley alone have exceeded 100 million tons. Because it contains a large amount of soluble heavy metal ions and is loess-colored, in domestic and foreign production practices, scientific research, and literature records, it is limited to modifying it to make cement retarder or building gypsum powder products. However, it is used as a cement retarder after being mod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/32C04B7/36
CPCY02P40/10Y02P40/121
Inventor 尹小林
Owner 长沙紫宸科技开发有限公司
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