Soil conditioner based on secondary use of chemical phosphorus tailings and preparation method of soil conditioner

Abstract

The invention discloses a soil conditioner based on secondary use of chemical phosphorus tailings and a preparation method of the soil conditioner. The soil conditioner is prepared from the following components in parts by mass: 30 to 70 parts of biological active carbon, 20 to 30 parts of weathered coal, 30 to 60 parts of the chemical phosphorus tailings and 5 to 10 parts of kaoline. The chemical phosphorus tailings consist of the following materials in percentage by mass: 35 to 45 percent of calcium oxide, 50 to 60 percent of sulfur trioxide, 2 to 6 percent of silicon dioxide, 0.1 to 0.3 percent of aluminum oxide, 0.1 to 0.3 percent of ferric oxide and 0.01 to 0.03 percent of magnesium oxide. A saline-alkali soil conditioner which serves as an effective component is added into the chemical phosphorus tailings to realize acid-alkali neutralization, so that on one hand, secondary use of wastes is realized, and on the other hand, the environment around a factory can be gradually improved; meanwhile, the added biological active carbon is a product obtained by recycling agricultural and forestry wastes; compared with the conventional modes such as direct combustion and biological returning to the field, the mode of converting straws of agricultural and forestry crops into the biological active carbon has the advantages that the resource utilization rate can be effectively increased, and no pollution to the environment can be caused.

Description

technical field [0001] The invention relates to a soil improver, more specifically, the invention mainly relates to a soil improver based on the secondary utilization of phosphate chemical tailings. Background technique [0002] Although my country's phosphate rock resources are abundant, their grades are generally not high. More than 90% of them are medium and low-grade phosphate rocks. Most of these resources can only be used more economically after beneficiation and enrichment. However, a large amount of phosphorus tailings will be produced in the chemical flotation process. At present, this part of tailings is discarded as industrial waste in the tailings pond, which not only occupies a large amount of land, but also most of the tailings are phosphorous rock after acid hydrolysis with sulfuric acid. When the by-products are washed by rainwater, a large amount of highly acidic water will flow to the nearby land and farmland, which also has a serious impact on the surrou...

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Problems solved by technology

[0003] One of the purposes of the present invention is to address the above-mentioned deficiencies and provide a soil conditioner based on the secondary utilization of phosphorus chemical industry tailings, in order to solve the problem that a large amount of phosphorus ore dressing tailings cannot be effectively used in the prior art, occupying an area and polluting the ecological environment, etc. technical problem

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