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Process for producing cement or cement products by metal tailings (skam)

A technology of metal tailings and cement products, applied in cement production, sustainable waste treatment, solid waste management, etc., to achieve the effects of solving pollution problems, huge economic benefits, and improving resource utilization

Inactive Publication Date: 2005-06-01
河北中科环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of metal tailings as a pozzolanic active material in the production of cement or cement products has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: Proportioning and performance control test of cement produced from skarn copper tailings (No. 1 is a comparison sample)

[0012] serial number

[0013]

Embodiment 2

[0014] Embodiment 2: cement mortar test result when tailings addition is 30%:

[0015] 3d MPa

[0016]

[0017]

[0018] 3d MP

[0019] Note: All tests implement the standard GB1344-1999

[0020] The above test proves that the technical scheme of mixing skarn metal tailings as pozzolanic active material and cement clinker to prepare cement according to the present invention is not only technically feasible, but also has better performance indicators than the control cement sample. And the same applies to non-metallic tailings.

[0021]

[0022] Note: No. 1 is the comparison sample

Embodiment 3

[0023] The result of embodiment 3 shows that the skarn metal tailings powder of the present invention partially replaces cement and is used to prepare concrete products and also receives a good use effect. In practical applications, the skarn metal tailings powder can replace 10- 50% cement.

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PUM

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Abstract

The present invention is process of cement and cement product with skarn as one kind of metal tail ore, and converts skarn into useful resource. The cement producing process includes adding skarn in 10-35 wt% and gypsum dihydrate in 3-5 wt% into cement clinker to form mixture, and the mixture is milled to 180 mesh and to form the skarn cement. The present invention replaces skarn for partial traditional cement material to solve the pollution caused by skarn while providing cement production with new material.

Description

technical field [0001] The invention relates to a method for producing cement or cement products from metal tailings, especially skarn tailings, and belongs to the technical field of cement or cement product production. Background technique [0002] Black and non-ferrous metal tailings are the associated parent rocks of metal (iron, copper, lead, zinc, molybdenum, tin, gold, silver, etc.) mines produced during volcanic eruptions, accounting for 40-99% of the total metal mines. The main chemical components of the tailings discharged after sorting are silicon oxide, aluminum oxide, iron oxide, calcium oxide, magnesium oxide and a small amount of other components. During the slow cooling process, the molten magma reacts to form aluminosilicate crystals with different chemical compositions. This kind of material is generally considered as a waste with no pozzolanic activity and little activity at home and abroad. Therefore, most of the metal tailings at home and abroad have no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/04C04B7/24C04B18/12C04B28/02
CPCY02P40/10Y02W30/91
Inventor 王学武邓新赵风清魏天信夏根华朱永军曹素改陈建波陈利群张志国
Owner 河北中科环保有限公司
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