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Ultrafine carbonate type tailing-based active material, preparation method thereof and application of ultrafine carbonate type tailing-based active material as cement material

A carbonate type, cement material technology, applied in the field of cement active material and cement material application, can solve the problems of safety, low cost of raw materials, low utilization rate of ultra-fine tailings, etc. The effect of hydration activity

Active Publication Date: 2020-09-01
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the low utilization rate of ultra-fine tailings in heavy metal tailings ponds in the prior art, and excessive accumulation causing environmental and safety problems, the first purpose of the present invention is to provide a method for utilizing ultra-fine carbonate tailings through simple high-temperature activation A method for preparing ultrafine carbonate-type tailings-based active materials, the method is simple, low in energy consumption, low in raw material costs, conducive to industrial production, and can realize the recycling, reduction and harmlessness of bulk industrial solid waste, Expand the market for industrial waste slag building materials, protect the surrounding and underground ecological environment of the tailings reservoir area

Method used

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  • Ultrafine carbonate type tailing-based active material, preparation method thereof and application of ultrafine carbonate type tailing-based active material as cement material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of ultrafine carbonate tailings-based active material:

[0028] (1) Take 5Kg of ultra-fine carbonate tailings as raw materials in an iron container, put them in a blast drying oven at 105°C and dry them to a constant weight, and then pass the massive tailings dried to a constant weight through a jaw crusher , crush the tailings to less than 5mm, and finally pass the crushed tailings through a 0.9mm square hole sieve to obtain dry ultrafine carbonate tailings powder.

[0029] (2) Take 300g of ultra-fine carbonate tailings powder and lay it flat on an iron plate with a length and width of 25cm×20cm, and then calcinate at a constant temperature of 750°C for 40min (the heating time is not included) and then cool naturally.

[0030] (3) Put the calcined and activated ultrafine carbonate tailings-based active material into a sealed bag and store it in a sealed and dry place, and weigh the mass loss.

[0031] Activity evaluation:

[0032]The above activa...

Embodiment 2

[0035] A preparation method of ultrafine carbonate tailings-based active material:

[0036] (1) Take 5Kg of ultra-fine carbonate tailings as raw materials in an iron container, put them in a blast drying oven at 105°C and dry them to a constant weight, and then pass the massive tailings dried to a constant weight through a jaw crusher , crush the tailings to less than 5mm, and finally pass the crushed tailings through a 0.9mm square hole sieve to obtain dry ultrafine carbonate tailings powder.

[0037] (2) Take 300g of ultra-fine carbonate tailings powder and lay it flat on an iron plate with a length and width of 25cm×20cm, and then calcine at a constant temperature of 750°C for 80min (the heating time is not included) and then cool naturally.

[0038] (3) Put the calcined and activated ultrafine carbonate tailings-based active material into a sealed bag and store it in a sealed and dry place, and weigh the mass loss.

[0039] Activity evaluation:

[0040] The above activat...

Embodiment 3

[0043] A preparation method of ultrafine carbonate tailings-based active material:

[0044] (1) Take 5Kg of ultra-fine carbonate tailings as raw materials in an iron container, put them in a blast drying oven at 105°C and dry them to a constant weight, and then pass the massive tailings dried to a constant weight through a jaw crusher , crush the tailings to less than 5mm, and finally pass the crushed tailings through a 0.9mm square hole sieve to obtain dry ultrafine carbonate tailings powder.

[0045] (2) Take 300g of ultra-fine carbonate tailings powder and lay it flat on an iron plate with a length and width of 25cm×20cm, and then calcine at a constant temperature of 800°C for 40min (the heating time is not included) and then cool naturally.

[0046] (3) Put the calcined and activated ultrafine carbonate tailings-based active material into a sealed bag and store it in a sealed and dry place, and weigh the mass loss.

[0047] Activity evaluation:

[0048] The above activat...

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Abstract

The invention discloses an ultrafine carbonate type tailing-based active material, a preparation method thereof and an application of the ultrafine carbonate type tailing-based active material as a cement material, and the preparation method comprises the following steps: drying and crushing ultrafine carbonate type tailings, and calcining at 750-850 DEG C to obtain the ultrafine carbonate type tailing-based active material; the active material has good hydration activity, can replace part of high-performance sulphoaluminate cement for application, greatly reduce the use cost of the sulphoaluminate cement, and is simple in preparation process, low in cost, low in energy consumption and beneficial to industrial production.

Description

technical field [0001] The invention relates to a cement active material, in particular to an active material processed from ultrafine carbonate tailings, and also relates to its preparation method and application as a cement material, belonging to the technical field of resource utilization of industrial solid waste materials . Background technique [0002] Mine mining and mineral processing have provided a large number of valuable resources for China's industrial production and economic development, and play an indispensable role. However, a large amount of tailings will be left in the process of mining and processing in mines. Tailings are mineral processing plants that use specific processes and production technologies under a specific economy to crush and grind lumpy ores and extract valuable chemical compounds from them. Residual waste after separation. It is a kind of industrial solid waste from mining and dressing. The usual disposal method is to stockpile it in a ...

Claims

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Application Information

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IPC IPC(8): C04B7/24C04B7/32C04B7/38C04B7/40C04B7/44
CPCC04B7/24C04B7/32C04B7/38C04B7/40C04B7/44Y02P40/10
Inventor 侯浩波罗腾谢巍朱华万沙郑凡李嘉豪董祎挈
Owner WUHAN UNIV
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