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A cemented filling method by mineral carbonation of tailings
The invention provides a cemented filling method by mineral carbonation of tailings, which belongs to the technical field of industrial wastes utilization. Solid wastes with high calcium and/or magnesium content and low hydration activity were selected as cementitious materials. Firstly, the cementitious materials are crushed, ground, and fully mixed with tailings, water and addictive to prepare the filling slurry. Secondly, the filling slurry is transported to the mine out area by a pipeline. After the goaf is filled, the filling area is sealed and blocked. Thirdly, CO2 is injected into the closed filling area to curing the filling body. Finally, real time monitoring on the status of solid, liquid, and gas at the surrounding rocks and filling body is carried out during the process of carbonation curing, to make sure the stability of surrounding rocks and the meeting the requirements of back and fill mining method. The cementing materials used in this invention were solid wastes that has high calcium and magnesium content, low hydration activity and little utilization rate. It greatly reduces the cost of raw materials used in cemented filling mining method. The invention is a cemented filling method by mineral carbonation of tailings, which has the advantages in simple process, low cost and environmentally clean. %AF Figure 1 5 17 Hl rr _cr r r _LLIL -LLLLLL -LLLLLL -LLLLLL -L-L" LLLLLL [ , _LL- LLLLLL _LIILLL _LLLILL _LLLLLL ___LLLLLL LILLLL _LLLLLL LLLLLL -LLLLLL,,., LLLLLL LLLLLL -LLLLLLL -LLLLLLL ,LL -L-L _LLLLLL- _LLLLLL _LIILLL _LLLILL _LLLLLL LLLLLL LLLLL ..-LLLLLL -LLLLLL,,.,-ILLLLLL _LLLLLL LLLLLL _L_ -ILL ',':LILLLL LLLLLL ±LLLL.LL L"LLL LLLLL -LLLLLL LLLLLL 'LLLLLLL _LLLLLL LLLLLL LLLLLJ. LLLLLL -LLLLLLLL _LLLLLL _ LLLLLL _LIILLL _ LLL__L ..,_L-LLL _LLLLLL ILLLILL LLLLLL LLLLLL _LLLLLL -L-L _LLLLLL -LLLLLL ILLLLLL _LLLLLL LLLLLL _LLLLLL ''-LLLLLL ILLLILL LILLLL _-LLLLLL ILLLLLL ___ LLLLLL LLLLLL _L_ ±LL-L L-LLL _LLLLLL ILLLLLL LLLLL LLLLLL LLLLLL LLLLLL -LL-L,,_LLLLLL _LLLLLL _LLILLLLLLLLL -LLLLLL LLLL L -IL LLLLLL LLLLLL LIILLL LLLIlL LLLL -.-LLLLLL ILLLILL LLLLLL LLLLLL __LL LLLLLL _LLLLLL -L-L L LLLL LLLLLL ,-ILLLLLL LL,,LLLL, L 'LL 'LLLLLLLLLLLLLLi, LLLLLLILLLLLl L LL L -ii:_J L LL 'Lli 9 Figure 2
A cemented filling method by mineral carbonation of tailings
The invention provides a cemented filling method by mineral carbonation of tailings, which belongs to the technical field of industrial wastes utilization. Solid wastes with high calcium and/or magnesium content and low hydration activity were selected as cementitious materials. Firstly, the cementitious materials are crushed, ground, and fully mixed with tailings, water and addictive to prepare the filling slurry. Secondly, the filling slurry is transported to the mine out area by a pipeline. After the goaf is filled, the filling area is sealed and blocked. Thirdly, CO2 is injected into the closed filling area to curing the filling body. Finally, real time monitoring on the status of solid, liquid, and gas at the surrounding rocks and filling body is carried out during the process of carbonation curing, to make sure the stability of surrounding rocks and the meeting the requirements of back and fill mining method. The cementing materials used in this invention were solid wastes that has high calcium and magnesium content, low hydration activity and little utilization rate. It greatly reduces the cost of raw materials used in cemented filling mining method. The invention is a cemented filling method by mineral carbonation of tailings, which has the advantages in simple process, low cost and environmentally clean. %AF Figure 1 5 17 Hl rr _cr r r _LLIL -LLLLLL -LLLLLL -LLLLLL -L-L" LLLLLL [ , _LL- LLLLLL _LIILLL _LLLILL _LLLLLL ___LLLLLL LILLLL _LLLLLL LLLLLL -LLLLLL,,., LLLLLL LLLLLL -LLLLLLL -LLLLLLL ,LL -L-L _LLLLLL- _LLLLLL _LIILLL _LLLILL _LLLLLL LLLLLL LLLLL ..-LLLLLL -LLLLLL,,.,-ILLLLLL _LLLLLL LLLLLL _L_ -ILL ',':LILLLL LLLLLL ±LLLL.LL L"LLL LLLLL -LLLLLL LLLLLL 'LLLLLLL _LLLLLL LLLLLL LLLLLJ. LLLLLL -LLLLLLLL _LLLLLL _ LLLLLL _LIILLL _ LLL__L ..,_L-LLL _LLLLLL ILLLILL LLLLLL LLLLLL _LLLLLL -L-L _LLLLLL -LLLLLL ILLLLLL _LLLLLL LLLLLL _LLLLLL ''-LLLLLL ILLLILL LILLLL _-LLLLLL ILLLLLL ___ LLLLLL LLLLLL _L_ ±LL-L L-LLL _LLLLLL ILLLLLL LLLLL LLLLLL LLLLLL LLLLLL -LL-L,,_LLLLLL _LLLLLL _LLILLLLLLLLL -LLLLLL LLLL L -IL LLLLLL LLLLLL LIILLL LLLIlL LLLL -.-LLLLLL ILLLILL LLLLLL LLLLLL __LL LLLLLL _LLLLLL -L-L L LLLL LLLLLL ,-ILLLLLL LL,,LLLL, L 'LL 'LLLLLLLLLLLLLLi, LLLLLLILLLLLl L LL L -ii:_J L LL 'Lli 9 Figure 2
A cemented filling method by mineral carbonation of tailings
LI JIAJIE (author) / NI WEN (author) / JIN XIN (author) / ZHAO SHAOWEI (author) / ZHU SITAO (author) / JIANG FUXING (author)
2021-10-14
Patent
Electronic Resource
English
| European Patent Office | 2021
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