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Composite tailing cementing material as well as preparation method and application thereof

A technology of cementitious materials and tailings, which is applied in the field of composite tailings cementitious materials and its preparation, can solve the problems of difficult mining and selection, high production costs, and few rich ores, and achieve low prices, low equipment requirements, and preparation methods simple effect

Active Publication Date: 2020-09-25
HEBEI UNIV OF ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the remaining unutilized reserves, there are many lean ores, few rich ores, many small and medium-sized mines, and few large-scale mines, which are difficult to mine and process and high in production costs.

Method used

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  • Composite tailing cementing material as well as preparation method and application thereof
  • Composite tailing cementing material as well as preparation method and application thereof

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Effect test

preparation example Construction

[0035] The present invention also includes a preparation method of the composite tailings cementitious material, the preparation method comprising the following steps:

[0036] Step 1. Use a jaw crusher to crush the copper slag to <2mm, dry it, and then use a ball mill to grind it to <0.08mm; dry the original aerated concrete waste, use a ball mill to grind it to <0.08mm, and then place it at 300 Calcined at ~500°C for 1-3 hours, and cooled naturally; after the desulfurization ash was dried, it was ground to <0.08mm by a vibrating ball mill; after the waste stone powder was dried, it was ground to <0.08mm by a ball mill; the drying temperature was 80-110°C, drying until the moisture content is less than 0.1%; the grinding machine is SMΦ500mm×500mm cement mill.

[0037] Step 2, with the material obtained in step 1 and steel slag and cyanide slag iron selection waste (specific surface area is 400~800m 2 / kg), quicklime, NaOH, Na 2 SiO 3 Mix in proportion, then place in a vibrat...

Embodiment 1

[0040] A composite tailings cementitious material, consisting of the following substances in parts by mass:

[0041] Steel slag and cyanide slag iron selection waste 80, aerated concrete waste 10, copper slag 10, quicklime 10, desulfurization ash 6, NaOH1, Na 2 SiO 3 0.75, waste stone powder 0.5.

[0042] The preparation method of the above-mentioned composite tailings cementitious material, the preparation method comprises the following steps:

[0043] Use a jaw crusher to crush the copper slag to <2mm, dry it, and then use a ball mill to grind it to <0.08mm; dry the undisturbed aerated concrete waste, use a ball mill to grind it to <0.08mm, and then place it at a high temperature of 300°C for calcination 1h, and cool naturally; after drying the desulfurization ash, use a vibrating ball mill to grind to <0.08mm; after drying the waste stone, use a ball mill to grind to <0.08mm; the drying temperature is 80°C, and dry to rate is less than 0.1%; the pulverizer is SMΦ500mm×50...

Embodiment 2

[0047] A composite tailings cementitious material, consisting of the following substances in parts by mass:

[0048] Steel slag and cyanide slag iron selection waste 70, aerated concrete waste 20, copper slag 10, quicklime 12, desulfurization ash 8, NaOH1.5, Na 2 SiO 3 1. Waste stone powder 0.5.

[0049] The preparation method of the above-mentioned composite tailings cementitious material, the preparation method comprises the following steps:

[0050] Use a jaw crusher to crush the copper slag to <2mm, dry it, and then use a ball mill to grind it to <0.08mm; dry the undisturbed aerated concrete waste, use a ball mill to grind it to <0.08mm, and then place it at a high temperature of 500°C for calcination 2h, and cool naturally; after drying the desulfurization ash, use a vibrating ball mill to grind to <0.08mm; after drying the waste stone, use a ball mill to grind to <0.08mm; the drying temperature is 80°C, and dry to rate is less than 0.1%; the pulverizer is SMΦ500mm×500...

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Abstract

The invention provides a composite tailing cementing material as well as a preparation method and application thereof. The composite tailing cementing material is prepared from steel slag and cyaniding slag iron separation waste, copper slag, aerated concrete waste, quick lime, desulfurized ash, NaOH, Na2SiO3 and waste stone powder. The preparation method comprises the following steps: crushing, drying and grinding the copper slag; drying and grinding the aerated concrete waste, calcining the waste at high temperature, and cooling the calcined product; drying and grinding the desulfurized ash,drying and grinding the waste stone powder, mixing the materials with steel slag, cyaniding slag iron separation waste, quick lime, NaOH and Na2SiO3 in proportion, and then uniformly stirring the mixture in a vibration stirrer, thereby finally producing the composite tailing cementing material. According to the method, the steel slag and cyaniding slag iron separation waste, the aerated concretewaste and the copper slag can be effectively utilized, waste is turned into wealth, environmental pollution is greatly reduced, and meanwhile great economic benefits and social benefits can be achieved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a composite tailings cementitious material and its preparation method and application. Background technique [0002] Steel slag and cyanide slag iron selection waste is the waste slag left after weak magnetic separation of iron powder in steel slag and cyanide slag. The waste residue has been ground to 400~800m 2 / kg, is the re-use of solid waste, realizing green and sustainable development. [0003] Copper slag is copper smelting slag. In addition to a large amount of copper, the copper smelting slag also contains various valuable metals such as Fe, Zn, Pb, Co, Ni and a small amount of precious metals Au, Ag, etc. There are about 190 million tons accumulated in my country, most of which are stored in slag yards. Among the remaining unutilized reserves, there are many lean ores, few rich ores, many small and medium-sized mines, and few large-scale mines, which are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/21C04B7/19C04B7/38
CPCC04B7/246C04B7/24C04B7/21C04B7/19C04B7/38Y02P40/10
Inventor 王长龙张凯帆高颖李军尹艺臻叶鹏飞霍泽坤赵高飞任真王绍熙
Owner HEBEI UNIV OF ENG
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