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Filling tailing curing agent containing copper smelting slag

A technology of copper smelting slag and curing agent, which is applied in the field of metal mines, can solve the problems of unsatisfactory curing effect, high cost and low early strength of ultra-fine tailings, and achieve good economic and social effects, high early strength and working performance stable effect

Inactive Publication Date: 2021-08-06
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two curing agents have unsatisfactory curing effects on ultra-fine tailings, and there are problems such as low early strength and high cost.

Method used

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  • Filling tailing curing agent containing copper smelting slag
  • Filling tailing curing agent containing copper smelting slag
  • Filling tailing curing agent containing copper smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 A tailings solidifying agent containing copper smelting slag, which is prepared by mixing the following raw materials uniformly and then drying to a moisture content of 0.5%: 60 kg of copper smelting slag fine powder, 20 kg of S95 mineral powder kg, 10 kg of desulfurized gypsum, 9 kg of Portland cement clinker powder, and 1 kg of Yuanming powder.

[0031] Among them: S95 ore powder comes from Hanzhong Iron and Steel Plant, and its specific surface area is 450 m 2 / kg.

[0032] The Portland cement clinker forms a powder material after grinding, and its specific surface area is 410m 2 / kg.

[0033] The desulfurized gypsum was taken from a nearby power plant, and it was determined that calcium sulfate dihydrate CaSO 4 2H 2 The O content is 93.6%.

[0034] The copper smelting slag originated from a copper smelter in Gansu, and its chemical composition is shown in Table 1 below.

[0035] Table 1 Composition of copper smelting slag

[0036]

[0037] Apply ...

Embodiment 2

[0046] Example 2 A tailings solidifying agent containing copper smelting slag, which is prepared by mixing the following raw materials uniformly and then drying to a moisture content of 0.5%: 66 kg of copper smelting slag fine powder, 15 kg of S95 mineral powder kg, 10 kg of desulfurized gypsum, 8 kg of Portland cement clinker powder, and 1 kg of Yuanming powder.

[0047] Among them: S95 ore powder comes from Xuanhua Iron and Steel Plant, and its specific surface area is 465 m 2 / kg.

[0048] The Portland cement clinker forms a powder material after grinding, and its specific surface area is 405m 2 / kg.

[0049] The desulfurized gypsum was taken from a nearby power plant, and it was determined that calcium sulfate dihydrate CaSO 4 2H 2 O content is 94%.

[0050] The copper smelting slag originated from a copper smelter in Hebei, and its chemical composition is shown in Table 3 below.

[0051] Table 3 Composition of copper smelting slag

[0052]

[0053] Apply the obtai...

Embodiment 3

[0062] Example 3 A tailings solidifying agent containing copper smelting slag, which is prepared from the following raw materials: 50 kg of fine powder of copper smelting slag, 15 kg of S95 ore powder, 20 kg of desulfurized gypsum, and Portland cement clinker 13 kg of fine powder, 2 kg of Yuanming powder.

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Abstract

The invention relates to a filling tailing curing agent containing copper smelting slag, the curing agent is prepared by uniformly mixing the following raw materials in percentage by mass: 30-70% of copper smelting slag micro powder, 10-30% of S95 mineral powder, 5-20% of desulfurized gypsum, 5-25% of Portland cement clinker micro powder and 1-3% of anhydrous sodium sulphate, and drying until the water content is lower than 1%. The obtained curing agent is stable in working performance, high in early strength, good in fluidity and free of volume shrinkage after being cured, and complete roof contact of the filling body can be achieved.

Description

technical field [0001] The invention relates to the technical field of metal mines, in particular to a tailings solidifying agent for filling copper-containing smelting slag. Background technique [0002] At present, non-ferrous metal solid waste discharge and resource utilization are major issues that need to be solved urgently in mines. It has become a bottleneck restricting the sustainable development and utilization of mineral resources in my country and the healthy development of the mining industry. It is necessary to completely remove the constraints of non-ferrous solid waste on resources and the environment. It is necessary to vigorously develop a green and sustainable resource utilization model characterized by the recycling of waste resources. [0003] At present, more than 80% of the world's copper is produced by pyrometallurgy, and more than 97% of my country's copper is produced by pyrometallurgy. A large amount of copper smelting slag will be produced in pyrome...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00775C04B2201/50
Inventor 张晨洁刘慧
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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