Autoclaved sand-lime brick prepared from superfine copper tailings

A technology for autoclaved lime-sand bricks and copper tailings, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as affecting crop growth, destroying soil fertility, harming aquatic organisms, etc. The effect of disposal and utilization process, enhancing economic value, enhancing economic and environmental benefits

Inactive Publication Date: 2022-03-25
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The migration of heavy metal elements into farmland will destroy soil fertility and affect the growth of crops. When mineral dressing chemicals flow into rivers and lakes, they will pollute water quality and endanger aquatic organisms.

Method used

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  • Autoclaved sand-lime brick prepared from superfine copper tailings
  • Autoclaved sand-lime brick prepared from superfine copper tailings
  • Autoclaved sand-lime brick prepared from superfine copper tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The invention provides an autoclaved lime-sand brick prepared by using ultra-fine copper tailings, which includes cement, ultra-fine copper tailings, fly ash, common urban tap water, water reducing agent and river sand. Concrete parts by weight (kg) proportioning ratio as shown in Table 1,

[0030] Table 1

[0031] project cement Ultrafine Copper Tailings fly ash river sand water Superplasticizer Benchmark Group 1 28.9 0 17 83.8 17.2 0.09 Benchmark Group 2 28.9 8.5 8.5 83.8 17.2 0.09 Benchmark Group 3 28.9 10.2 6.8 83.8 17.2 0.09 Benchmark Group 4 28.9 11.9 5.1 83.8 17.2 0.09 Benchmark Group 5 28.9 13.6 3.4 83.8 17.2 0.09

[0032] Among them: fly ash is grade 2 or above, with a fineness of 200 mesh, accounting for more than 90%; river sand, with a fineness modulus of 2.7 and an apparent density of 2650kg / m 3 ; The ultra-fine copper tailings come from the Langyashan tailings pond in Chuzhou...

Embodiment 2

[0041] The invention provides an autoclaved lime-sand brick prepared by using ultra-fine copper tailings, which includes cement, ultra-fine copper tailings, slag, water reducing agent and ordinary urban tap water. Concrete parts by weight (kg) proportioning as shown in table 4,

[0042] Table 4

[0043] project cement Ultrafine Copper Tailings slag water Superplasticizer Benchmark group 6 330 0 1653 300 0.2 Benchmark Group 7 330 165.3 1487.7 300 0.16 Benchmark Group 8 330 495.9 1157.1 300 1.2 Benchmark Group 9 313.5 62.83 1653 285 0.3 Benchmark Group 10 297 125.66 1653 270 0.36 Benchmark Group 11 280.5 188.48 1653 255 0.48 Benchmark Group 12 264 251.31 1653 240 1.2

[0044] Among them: the slag is S105 grade high alumina slag, the apparent density is 2800kg / m 3 , BET specific surface area, 425m 2 / kg; the sand is ordinary river sand with a fineness modulus of 2.5; the ultra-fine cop...

Embodiment 3

[0051] The invention provides an autoclaved lime-sand brick prepared by using superfine copper tailings, which comprises cement, superfine copper tailings, metakaolin and common urban tap water. Concrete parts by weight (kg) proportioning ratio as shown in Table 6,

[0052] Table 6

[0053] project cement Ultrafine Copper Tailings Metakaolin river sand water Benchmark Group 13 144.50 42.00 85.00 402.25 86.00 Benchmark group 14 137.30 57.70 80.75 402.25 81.70 Benchmark Group 15 123.55 73.45 72.70 402.25 73.55 Benchmark Group 16 105.00 89.15 61.75 402.25 62.50

[0054] Wherein: metakaolin is commercially available calcined kaolin powder, preferably, the fineness is 400 meshes, accounting for more than 90%. The sand is ordinary river sand with a fineness modulus of 2.5; the ultra-fine copper tailings come from the Langyashan tailings pond in Chuzhou City, Anhui Province, and the particle size of the ultra-fine coppe...

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Abstract

The invention discloses an autoclaved sand-lime brick prepared from superfine copper tailings. The autoclaved sand-lime brick is prepared from the following raw materials: the superfine copper tailings, fly ash, cement, river sand, metakaolin, a water reducing agent and slag. The autoclaved sand-lime brick is prepared by using the superfine copper tailings as a mixture source of the autoclaved sand-lime brick, and a novel environment-friendly building material is prepared by utilizing the characteristics of low energy consumption, no clay, wide production raw materials and the like in the production process of the autoclaved sand-lime brick. Meanwhile, the autoclaved sand-lime brick is produced by adopting industrial waste tailings, so that the use of other mineral raw materials is reduced, consumables can be saved, wastes are turned into wealth, the treatment and utilization process of the superfine copper tailings is greatly simplified, the economic, safe and environmental burden of brick kiln brick firing enterprises is relieved, the economic value of the superfine copper tailings is improved, and the economic benefit is increased. Practical prospects and values of the autoclaved sand-lime brick are exerted, national environmental protection policy requirements are met, and the application prospects are huge.

Description

technical field [0001] The invention relates to the field of resource utilization of ultrafine copper tailings, in particular to an autoclaved lime-sand brick prepared by using ultrafine copper tailings. Background technique [0002] The rapid development of urbanization has brought about dense population and increasing housing construction. Copper ore resources are important natural resources supporting my country's economic development. Therefore, in recent years, the mining volume of my country's copper mines has increased year by year, but the average grade of copper mines in my country Low, only 0.07-0.081, which leads to a large amount of solid waste of copper tailings in the process of copper smelting. According to the statistical data of the "2019 China Solid Waste Treatment Industry Analysis Report", the amount of tailings discharged in my country is relatively high every year, and the discharge of copper tailings has reached 224 million tons per year. However, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/12C04B111/20
CPCC04B28/00C04B18/12C04B2111/00017C04B2201/50C04B2111/20C04B18/08C04B2103/302C04B14/06Y02W30/91
Inventor 顾志成陈佩圆赵岗乔小明王成焦振华赵成李尚坤方虎裴春宁沈心钱新亮谭伟博李进马闯
Owner ANHUI UNIV OF SCI & TECH
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