Iron tailing residue reclaimed soil and preparation method thereof

A technology of iron tailings and soil, which is applied in the direction of fertilizer mixture, fertilization device, application, etc., can solve the problems that cannot be effectively reused in time, and the discharge of iron tailings residues is large, so as to achieve simple composition, increase utilization, and reduce The effect of environmental problems

Inactive Publication Date: 2014-12-03
湖南鑫生矿冶废弃物综合利用科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of iron tailings residue reclaimed soil and its preparation method to solve the technical problem in the prior art that the discharge of iron tailings residues is too large and cannot be effectively reused in time

Method used

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  • Iron tailing residue reclaimed soil and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1) After the waterworks sludge is dehydrated, add 30% of its mass of lime in the waterworks sludge to adjust the pH to neutral, air-dry, and pass through a 2mm sieve to obtain the under-screened sludge air-dried granules, and the obtained sludge air-dried granules The saturated water content is 93%, and the organic matter content is 35%;

[0056] 2) After air-drying the iron tailings residue (after carrying out strong magnetic separation, the magnetic separation intensity is 18000Gs, and the total iron grade is 2%), pass through a 2mm sieve, and add 30% iron tailings residue quality dirt to the undersieve. The air-dried mud particles are mixed to obtain the reclamation mixture, and 2kg / mu of potassium fertilizer is added thereto;

[0057] 3) Spread the reclamation mixture evenly with a thickness of 10cm and mature it. During the aging process, the water content was kept at 17%, the ambient temperature was 25°C, and the aging was performed for 10 days. Obtain reclaimed...

Embodiment 2

[0060] 1) After the waterworks sludge is dehydrated, add 15% of its quality lime in the waterworks sludge to adjust the pH to neutral, air-dry, and pass through a 2mm sieve to obtain the undersize sludge air-dried granules, and the obtained sludge air-dried granules The saturated water content is 93%, and the organic matter content is 35%;

[0061] 2) After air-drying the iron tailings residue (after carrying out strong magnetic separation, the magnetic separation intensity is 15000Gs, and the total iron grade is 1%), pass through a 2mm sieve, and add 20% iron tailings residue quality dirt to the undersieve. The air-dried mud particles are mixed to obtain the reclamation mixture, and 4kg / mu of potassium fertilizer is added thereto;

[0062] 3) Spread the reclamation mixture evenly, with a thickness of 8cm, and mature it. During the curing process, the water content is always maintained at 13%, and the ambient temperature is 20. ℃, aging for 8 days. Obtain reclaimed soil (po...

Embodiment 3

[0065] 1) After the waterworks sludge is dehydrated, add 20% of its quality lime in the waterworks sludge to adjust the pH to neutral, air-dry, and pass through a 2mm sieve to obtain the undersize sludge air-dried granules, and the obtained sludge air-dried granules The saturated water content is 93%, and the organic matter content is 35%;

[0066] 2) After air-drying the iron tailings residue (after carrying out strong magnetic separation, the magnetic separation intensity is 17000Gs, and the total iron grade is 1.5%), pass through a 2mm sieve, and add 25% of the iron tailings residue mass to the undersieve. The air-dried mud particles are mixed to obtain the reclamation mixture, and 3 kg / mu of potassium fertilizer is added thereto;

[0067] 3) Spread the reclamation mixture evenly, with a thickness of 8-10cm, and ripen it. During the aging process, the water content was kept at 15%, the ambient temperature was 25°C, and the aging was carried out for 9 days. Get reclaimed s...

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Abstract

The invention provides iron tailing residue reclaimed soil and a preparation method thereof. The reclaimed soil is obtained by curing a reclaimed mixture. The reclaimed mixture comprises air-dried particles of the iron tailing residue and air-dried particles of sludge from a tap water plant which accounts for 20-30% of the mass of the air-dried particles of the iron tailing residue. Since the reclaimed soil provided by the invention comprises the iron tailing residue and the sludge from the tap water plant, various bacteria contained in the sludge from the tap water plant can improve the amount of bacteria in the iron tailing residue, and meanwhile, bacteria contained in the sludge from the tap water plant have the effect in decomposing harmful substances in the residue and the farming performance of the reclaimed soil is the same as or close to that of the conventional soil. Due to adoption of the preparation method, the utilization ration of the residue can be improved and the problem of the stockpiling of the residue can be alleviated. The soil is simple in composition and the stockpiling amount of the existing residue can be effectively reduced.

Description

technical field [0001] The invention relates to the field of comprehensive utilization of iron tailings, in particular to reclaimed soil from iron tailings residues and a preparation method thereof. Background technique [0002] The protection of cultivated land is an important national policy of our country. If the mining subsidence and the residual soil after mining can be used as soil to realize reclamation, the cultivation of cultivated land can be realized. With the development of industrialization and the increase in the number of newly opened mines, the discharge and accumulation of tailings are also increasing, and the tailings ponds are also increasing. [0003] At present, after extracting various useful elements in iron tailings, most of the remaining iron tailings residues are only used as soil conditioners to supplement iron and other elements in the soil. Simultaneously, in order to improve the effect of the soil improver, a large amount of nitrogen, phosphoru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
Inventor 陈述明王杨
Owner 湖南鑫生矿冶废弃物综合利用科技有限公司
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