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Mineral admixture prepared from solid waste and preparation method thereof

A technology of mineral admixtures and solid wastes, which is applied in the field of resource utilization to achieve the effects of improving performance, promoting early hydration, and improving activity index

Inactive Publication Date: 2020-08-28
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Synergistic utilization of waste rock chips (powder) for mining and construction, polishing powder for processing natural stone for architectural decoration, tailings slag from mining lead-zinc mines and converter steelmaking furnace bottom slag to prepare mineral admixtures has not yet been seen. Related prior art reports

Method used

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  • Mineral admixture prepared from solid waste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A method for preparing a mineral admixture prepared from solid waste, the specific steps are as follows:

[0046] The polishing powder for processing natural granite stones for architectural decoration is first vacuum-filtered and then dried to a moisture content of 1.6%, and the tailings slag from mining lead-zinc ore is first dried to a moisture content of 1.0%; 40wt% waste stone chips (powder) of limestone crushed stones for mining and construction, 15wt% tailings slag from mining lead-zinc mines, and 20wt% converter steelmaking bottom slag are metered and batched, and then mixed and ground with a ball mill; the obtained The mixture is measured and dosed according to mass percentage 75wt% and polishing powder 25wt% of processed natural granite stone for architectural decoration, and then stirred and mixed evenly to obtain the mineral admixture.

Embodiment 2

[0048] A method for preparing a mineral admixture prepared from solid waste, the specific steps are as follows:

[0049] The polishing powder of the natural metamorphic chlorite schist used for processing architectural decoration is vacuum-filtered and then dried to a moisture content of 2.0%, and the tailings slag from the mining of lead-zinc ore is first dried to a moisture content of 1.5%; Mass percentage, after 30% of waste stone chips (powder) of granite gravel for mining and construction, 20wt% of tailings slag of mining lead-zinc ore, and 20wt% of converter steelmaking furnace bottom slag are measured and batched, a ball mill is used for mixed grinding; The mixture obtained after grinding is then measured and dosed according to 70wt% by mass and 30wt% of polishing powder for processing natural metamorphic chlorite schist stone for architectural decoration, and then stirred and mixed evenly to obtain the mineral admixture.

Embodiment 3

[0051] A method for preparing a mineral admixture prepared from solid waste, the specific steps are as follows:

[0052] The polishing powder for processing natural marble stone for architectural decoration is first vacuum-filtered and then dried to a moisture content of 1.8%, and the tailings slag from mining lead-zinc ore is first dried to a moisture content of 1.2%; 20wt% of waste stone chips (powder) of granite crushed stones for mining and construction, 30wt% of tailings slag from mining lead-zinc mines, and 30wt% of converter steelmaking furnace bottom slag are measured and batched, and mixed and ground by ball mills; the obtained The mixture is measured and dosed according to mass percentage of 80wt% and polishing powder of processed natural marble stone for architectural decoration 20wt%, and then stirred and mixed evenly to obtain the mineral admixture.

[0053] Table 1 shows the performance index parameters of the mineral admixture prepared from solid waste in Exampl...

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Abstract

The invention discloses a mineral admixture prepared from solid waste and a preparation method thereof. Raw materials of the mineral admixture are solid waste and comprise waste stone chips (powder) of macadam for mining and construction, polishing powder for processing natural stone for architectural decoration, tailing slag for mining lead-zinc ore and converter steelmaking bottom slag. The characteristics of the four waste residues are fully utilized, the mineral admixture is prepared through drying, compound doping, mixed grinding and mixed stirring, synergistic utilization is achieved, solid waste is turned into wealth, the problem of shortage of the mineral admixture is solved, and meanwhile the problems that the waste occupies land and pollutes the environment are solved.

Description

technical field [0001] The invention relates to resource utilization of solid waste in the field of building materials, and more specifically, to a mineral admixture prepared by using solid waste and a preparation method thereof. Background technique [0002] Protecting the environment, reducing the consumption of natural resources and improving the performance of cement concrete are the two most important issues facing the cement and concrete industry at present. Making full use of mineral admixtures can effectively solve the above problems. There is no precise definition of mineral admixtures. Inorganic mineral substances added to cement and inorganic mineral fine powder added to mortar and concrete can be called mineral admixtures. The ones in it are called cement mixtures, and the ones added to mortar and concrete are called admixtures. The application of mineral admixtures, on the one hand, can reduce the amount of Portland cement clinker or Portland cement used, and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16C04B18/12C04B18/14
CPCC04B40/0039C04B18/12C04B18/142C04B18/16Y02W30/91
Inventor 殷素红郑鹏飞黎书洋
Owner SOUTH CHINA UNIV OF TECH
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