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Red mud soilification repairing agent and application method thereof

An application method and technology of a remediation agent are applied in the field of red mud soil remediation and its application, which can solve the problems of difficulty in realizing large-scale popularization and application, limited supply scope and high comprehensive cost, and achieve the promotion of red mud soil aggregate structure. The effect of generating, improving fertilizer and water retention capacity, and low construction cost

Inactive Publication Date: 2018-12-11
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing patented technology has certain effects on the restoration and improvement of red mud soil, but the availability of the restoration agent is limited, and there are problems of small scale, high price and limited supply range
In addition, the restoration application method has the problems of complex operation, large engineering volume, and high comprehensive cost, so it is difficult to achieve large-scale promotion and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 6.04 tons of flue gas desulfurization gypsum, 3.02 tons of fly ash, 1.51 tons of urban dry sludge, 2.27 tons of biomass sawdust, 1.21 tons of superphosphate, 0.45 tons of bentonite, 0.91 tons of humic acid, 0.30 tons of cow dung, 0.23 tons of urea, 0.06 tons of potassium dihydrogen phosphate, and the raw materials of the above weights were evenly mixed to obtain the red mud soil restoration agent.

[0021] Spread the red mud soil repair agent evenly on an area of ​​200m 2 On the red mud ground, use a rotary tiller to mix the restoration agent and red mud evenly, and then water and mature the soil for 3 days. The pH of the red mud soil is 8.16, and the bulk density is 1.09g / cm 3 . The germination rate of alfalfa was 82% 10 days after planting on the red mud soil, and the average plant height was 62cm after 3 months of planting.

Embodiment 2

[0023] Weigh 5.74 tons of phosphogypsum, 2.87 tons of fly ash, 2.87 tons of urban dry sludge, 3.83 tons of agricultural straw powder, 0.96 tons of superphosphate, 0.96 tons of bentonite, 0.38 tons of humic acid, 0.19 tons of chicken manure, and 0.10 tons of urea tons, 0.11 tons of potassium dihydrogen phosphate, and the raw materials of the above weight are uniformly mixed to obtain the red mud soil restoration agent.

[0024] Evenly spread the red mud soil restoration agent on an area of ​​150m 2 On the red mud ground, use a rotary tiller to mix the repair agent and red mud evenly, and then water and mature the soil for 5 days. The pH of the red mud soil is 8.05, and the bulk density is 1.02g / cm 3 . The germination rate of vetiver was 78% 10 days after planting on the red mud soil, and the average plant height was 122cm after 3 months of planting.

Embodiment 3

[0026] Weigh 5.80 tons of citric acid gypsum, 1.16 tons of fly ash, 2.32 tons of urban dry sludge, 2.90 tons of biogas residue, 1.16 tons of superphosphate, 0.81 tons of bentonite, 0.46 tons of humic acid, 0.17 tons of pig manure, urea 0.12 tons and 0.09 tons of potassium dihydrogen phosphate, and the raw materials of the above weights were evenly mixed to obtain the red mud soil restoration agent.

[0027] Evenly spread the red mud soil restoration agent on an area of ​​300m 2 On the red mud ground, use a rotary tiller to mix the restoration agent and red mud evenly, and then water and mature the soil for 7 days. The pH of the red mud soil is 8.32, and the bulk density is 1.16g / cm 3 . After planting Bermudagrass on the red mud soil, the germination rate was 85% within 10 days, and the stolons expanded well after 3 months of planting, with an average plant height of 33cm, and the green coverage rate of the test site was >95%.

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PUM

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Abstract

The invention relates to a red mud soilification repairing agent and an application method thereof, and belongs to the technical field of ecological restoration of a red mud yard. Main raw materials of the repairing agent are industrial and municipal solid wastes and agricultural waste biomass powder, and raw materials are wide in sources and low in prices. By evenly ploughing the repairing agentand red mud, and then watering and ripening, the red mud soilification improvement can be realized in a short time, so that the red mud has resistant crop growth conditions and the natural ecologicalenvironment of the red mud yard and its surroundings can be improved. The technique has the advantages of simple application method, small engineering quantity and low cost.

Description

technical field [0001] The invention relates to the technical field of red mud soil restoration, in particular to a red mud soil restoration agent and an application method thereof. Background technique [0002] Red mud is an industrial solid waste produced during the alumina production process. Every ton of alumina produced will produce 1.0-1.8 tons of red mud. At present, there are more than 3 billion tons of red mud stockpiled in the world, and it is increasing at a rate of 120 million tons per year. The annual discharge of red mud in my country exceeds 80 million tons, and the stockpiles have reached more than 500 million tons. Although there are many comprehensive utilization technologies for red mud reduction and resource utilization, such as red mud used as building materials, synthesis of environmentally friendly functional materials, and recovery of valuable elements, etc., there are few applied technologies, and the consumption of red mud is quite large. Its comp...

Claims

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Application Information

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IPC IPC(8): C09K17/40
CPCC09K17/40
Inventor 刘中凯刘万超李帅闫琨康泽双李学鹏孙凤娟曹瑞雪练以诚张腾飞苏钟杨
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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