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Method for producing pasty unclassified tailing filling materials containing red mud

A technology of full tailings and red mud, which is applied in the field of mining engineering and environmental protection engineering, can solve the problems of endangering the environment, high mining cost of cementation and filling, and achieve the effects of reducing economic pressure, improving resource mining recovery rate, and good early strength

Active Publication Date: 2011-10-12
SHANXI YUNQUAN GEOTECHNICAL ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the high cost of cementing and filling mining and solve the problem of a large amount of tailings and Bayer process red mud that is harmful to the environment

Method used

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  • Method for producing pasty unclassified tailing filling materials containing red mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Dry the red mud to a moisture content of 0.7%, and then grind it to a specific surface area of ​​800m 2 / kg.

[0018] (2) Dry the blast furnace slag to a moisture content of 0.6%, and then grind it to a specific surface area of ​​420m 2 / kg.

[0019] (3) Dry the desulfurized gypsum to a moisture content of 0.8%, and then grind it to a specific surface area of ​​420m 2 / kg.

[0020] (4) Grind the cement clinker until the specific surface area is 350m 2 / kg.

[0021] (5) Mix 24% of the above-mentioned red mud finely ground powder, 56% of water-quenched blast furnace slag finely ground powder, 10% of desulfurized gypsum, and 10% of cement clinker in a mixer according to the percentage by weight on a dry basis. gelling material A.

[0022] (6) Carry out water content detection with whole tailings, and convert its water content into water content according to its adding total amount, be 0.18 by cementitious material A / full tailings weight ratio, water / cementitious ...

Embodiment 2

[0027] Dry the red mud to a moisture content of 0.9%, dry the water-quenched blast furnace slag to a moisture content of 0.4%, and dry the desulfurized gypsum to a moisture content of 0.6%, and then separately grind the water-quenched blast furnace slag to a specific surface area of ​​400m 2 / kg, the slag powder is mixed with dry red mud, desulfurized gypsum, and cement clinker in a ball mill at 56%, 24%, 11%, and 9% by weight percentage on a dry basis to a specific surface area of ​​407m 2 / kg to produce gelling material B.

[0028] Check the water content of the whole tailings, and convert the water content into water content according to the total amount of the tailings added. The weight ratio of cementitious material B / full tailings is 0.11, and the weight ratio of water / cementation material is 2.24. Stir evenly A paste full tailings cemented filling material is prepared.

[0029] The paste full tailings filling material prepared according to the above steps has the perfo...

Embodiment 3

[0034] (1) Dry the red mud to a moisture content of 0.8%, and grind it to a specific surface area of ​​800m 2 / kg.

[0035] (2) Dry the water-quenched blast furnace slag to a moisture content of 0.3%, and grind it to a specific surface area of ​​420m 2 / kg.

[0036](3) Dry the desulfurized gypsum to a moisture content of 0.9%, and grind it to a specific surface area of ​​420m 2 / kg.

[0037] (4) Grind the cement clinker until the specific surface area is 350m 2 / kg.

[0038] (5) 50% of the above-mentioned ground red mud powder, 30% of the ground powder of water-quenched blast furnace slag, 9% of desulfurized gypsum, and 11% of cement clinker were uniformly mixed in a mixer according to the percentage by weight on a dry basis. gelling material A.

[0039] (6) Carry out moisture content detection with whole tailings, and convert its moisture content into water content by its added total amount, be 0.18 by cementitious material A / full tailings weight ratio, water / cementitio...

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Abstract

The present invention provides a method for producing pasty unclassified tailing filling materials containing red mud and belongs to the fields of environmental protection engineering and mineral engineering. The method is characterized by comprising the following steps: firstly, stoving the required materials comprising red mud, slag and desulfurized gypsum respectively; then, grinding red mud, slag, cement clinker and desulfurized gypsum with the corresponding dry-basis weight percentage being 24%-50%, 30%-56%, 1%-15%, and 1%-15% in a separate or mixed manner until the specific surface area thereof reaches 300-900m<2> / kg, to obtain a gel material; and evenly stirring by the weight ratio between the gel material and the unclassified tailings being 0.08-0.20 and the weight ratio between water and the gel material being 1.2-3.0, so as to obtain qualified pasty unclassified tailing filling materials. The method for producing pasty unclassified tailing filling materials containing red mud provided by the present invention can make good use of solid waste that is difficult to be comprehensively utilized, such as red mud, desulfurized gypsum and unclassified tailings and solve the problems of high cost and low early strength in cement-bonded filling mining.

Description

technical field [0001] The invention belongs to the fields of environmental protection engineering and mining engineering, and in particular relates to a method for producing paste full tailings filling material by using solid wastes such as Bayer process red mud, water-quenched blast furnace slag, desulfurized gypsum and whole tailings. Background technique [0002] On the one hand, mining development has promoted economic development and social progress, but on the other hand, it has caused environmental pollution and affected social development. Mine filling technology is gradually developed to meet the needs of mining development. Generally, natural sand, rod grinding, waste rock or whole tailings are used as filling aggregates, and cement is used as cementing agent. The unit consumption of filling cement is about 200m 2 / kg, due to the high cost of cement, natural sand, and rod sanding in raw materials, many mines can only hold back cemented filling. [0003] my countr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14C04B7/21C04B18/12
CPCY02P40/10Y02W30/91
Inventor 倪文祝丽萍张旭芳黄晓燕张玉燕黄迪
Owner SHANXI YUNQUAN GEOTECHNICAL ENG TECH CO LTD
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