Magnetized mine tailing complex fertilizer

Abstract

The present invention discloses a compound fertilizer of magnetized tailings, which is prepared with tailings containing iron, a nitrogen fertilizer or a compound fertilizer of nitrogen, phosphor and potassium through uniform mixing, magnetizing treatment, bagging and other processes. The compound fertilizer comprises the ingredients of following contents: 10 to 40 percent (weight) of the tailings containing iron, and 90 to 10 percent (weight) of the nitrogen fertilizer, or the compound fertilizer of nitrogen, phosphor and potassium. The content (weight) of ferroferric oxide in the tailings containing iron reaches to 3 to 15 percent; the content of the grain size of -0.1mm reaches to 50 to 100 percent (weight); wherein, the content of the grain size of -20um is less than or equal to 30 percent. The compound fertilizer has the advantages of simple composition, low cost, excellent magnetizing effect, application of a large amount of the tailings and no soil compaction after the long-term use; the production of crops is greatly improved after the fertilizer is used.

Description

technical field [0001] The invention relates to a magnetized compound fertilizer, in particular to a magnetized tailings compound fertilizer prepared from mine iron ore tailings and agricultural chemical fertilizers, which can be widely used in crop fields such as wheat, rice, rapeseed, corn and soybeans apply. Background technique [0002] Fertilizers are the most important source of mineral nutrients in crop production. Worldwide, the application of chemical fertilizers has always been regarded as an important symbol of modern agricultural production. As far as my country's agricultural production is concerned, in my country's limited cultivated land area, the proportion of low- and medium-yielding fields is close to 2 / 3, and the overall nutrient content of the soil is not high. However, under the condition of lack of soil nutrients, not only the crop yield potential cannot be exerted , crop quality will inevitably be adversely affected. Therefore, the application of che...

AI Technical Summary

Problems solved by technology

[0007] However, the composition of the multivariate compound fertilizer is complex and the magnetic effect is poor.

The content of iron in fly ash, pyrite ash, iron tailings, and yellow phosphorus slag discharged from different factories and mines varies greatly, and the content of magnetite that can be magnetized varies greatly; moreover, fly ash, pyrite ash, Yellow phosphorus slag may contain harmful elements, which are not good for plant growth

Images