Magnetized tailings composite soil modifier

Abstract

The invention discloses a magnetized iron tailing compound soil amendment, which is prepared by iron-containing tailing, nitrogen fertilizer or nitrogen, phosphor and kalium compound fertilizer through the processes of mixing, magnetizing treatment, bagging and so on. The magnetized iron tailing compound soil amendment has the components according to the content ranges as follows: the iron-containing tailing 80%-96% (weight), the nitrogen fertilizer or the nitrogen, phosphor and kalium compound fertilizer 4%-20% (weight); and the ferriferrous oxide content in the iron-containing tailing 3%-15%(weight). The particle size of the iron-containing tailing is minus 0.1 mm, and the content occupies 60 to 100 percent (weight), wherein minus 20 um content is less than or equal to 30 percent. The magnetized iron tailing compound soil amendment has the advantages that the components are simple, the cost is low, the magnetized effect is good, the tailing used amount is large, and the soil hardening can not be caused during long use, and the agriculture crop wealth effect is obvious after application.

Description

Technical field [0001] The invention relates to a soil conditioner, in particular to a magnetized tailings composite soil conditioner prepared from mine iron ore tailings and agricultural fertilizers as raw materials, which can be used for soil improvement or directly used as a compound fertilizer. Background technique [0002] The amount of mine tailings produced in my country is 600-700 million tons, and the amount of tailings stockpiled is about 7-8 billion tons. Metallurgical mines alone produce more than 300 million tons of tailings each year. These mine solid wastes have caused serious harm to society, economy and environment due to improper treatment and disposal, leading to a series of problems such as aggravation of engineering disasters, waste of resources, water pollution, and destruction of vegetation. While mine solid waste is hazardous, it also has the characteristics of being usable, and it is a valuable secondary resource. The salient characteristics of solid wast...

AI Technical Summary

Problems solved by technology

However, the composition of the multivariate compound fertilizer is complex, the magnetic effect is poor, the amount of nitrogen, phosphorus, and potassium compound fertilizer is large, the amount of industrial waste such as iron selection tailings is small, and the cost is high. It cannot be used as a soil improver, and it cannot consume a large amount of solids. waste

Moreover, pyrite ash and yellow phosphorus slag may contain harmful elements, which are not good for plant growth.

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