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Method for preparing phosphate fertilizer soil conditioner by utilizing phosphate tailings and acid wastewater

A soil conditioner, acid waste water technology, applied in the application, fertilization device, fertilizer mixture and other directions, can solve the problems of high cost, unutilized phosphorus resources, no way to further recover, etc., to reduce land area, reduce treatment costs and Emissions, tailings reduction effect

Inactive Publication Date: 2013-04-24
INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process technology is consistent with the invention patent "A Method for Producing Sulphur-Magnesium Fertilizer Using High Magnesium Phosphorus Tailings Slag". It is technically feasible, but still has the problem of high cost
[0008] Based on the above technical conditions, there is no way to further recycle the phosphate ore in the phosphate tailings through beneficiation under the existing technical and economic conditions. At present, a large amount of phosphate tailings are still piled up in the tailings pond, and this part of phosphorus resources cannot be utilized.

Method used

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  • Method for preparing phosphate fertilizer soil conditioner by utilizing phosphate tailings and acid wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare raw materials: Phosphate rock scrubbing ore dressing tailings containing P 2 o 5 15%~18%, pulp concentration 30%~35%.

[0034] Add acidic wastewater containing sulfuric acid with a mass concentration of 8% to 10% to the raw materials, and the acidic wastewater also contains lead, cadmium, and arsenic that meet the discharge standards, such as figure 1 As shown, mix with phosphorus tailings in the tailings buffer pool for 10 to 15 minutes, transport the mixed slurry from the tailings buffer pool to the tailings pond, and control the amount of acid waste water added to the tailings water discharged from the tailings pond If the pH value is greater than 6.8, after 6 to 12 months of stockpiling, the tailings with a water content of less than 10% on a dry basis in the tailings pond will become 12% to 14% active P 2 o 5 It is a soil conditioner with the effect of calcium magnesium phosphate fertilizer.

Embodiment 2

[0036] Prepare raw materials: phosphate rock flotation tailings containing P 2 o 5 12%~15%, pulp concentration 25%~30%.

[0037] Add acidic wastewater containing sulfuric acid with a mass concentration of 5% to 8% to the raw materials, and the acidic wastewater also contains lead, cadmium, and arsenic that meet the discharge standards, such as figure 1 As shown, mix with phosphorus tailings in the tailings buffer pool for 10 to 15 minutes, transport the mixed slurry from the tailings buffer pool to the tailings pond, and control the amount of acid waste water added to the tailings water discharged from the tailings pond If the pH value is greater than 6.8, after 6 to 12 months of stockpiling, the tailings with a water content of less than 10% on a dry basis in the tailings pond will become 9% to 12% active P 2 o 5 It is a soil conditioner with the effect of calcium magnesium phosphate fertilizer.

Embodiment 3

[0039] Prepare raw materials: phosphate rock flotation tailings containing P 2 o 5 10%~12%, pulp concentration 20%~25%.

[0040] Add acidic wastewater containing sulfuric acid with a mass concentration of 5% to 8% to the raw materials, and the acidic wastewater also contains lead, cadmium, and arsenic that meet the discharge standards, such as figure 1 As shown, mix with phosphorus tailings in the tailings buffer pool for 10 to 15 minutes, transport the mixed slurry from the tailings buffer pool to the tailings pond, and control the amount of acid waste water added to the tailings water discharged from the tailings pond If the pH value is greater than 6.8, after 6 to 12 months of stockpiling, the tailings with a water content of less than 10% on a dry basis in the tailings pond will become 7% to 9% active P 2 o 5 It is a soil conditioner with the effect of calcium magnesium phosphate fertilizer.

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Abstract

The invention belongs to the technical field of ore dressing chemical industry, particularly a method for preparing a phosphate fertilizer soil conditioner by utilizing phosphate tailings and acid wastewater. The method comprises the following steps of: using ore pulp of the phosphate tailings as the raw material, adding the acid wastewater drained from enterprises such as sulfuric acid plants, phosphate fertilizer plants, metallurgical plants and the like, and mixing the acid wastewater and the phosphate tailings in a tailing buffer pool; conveying mixed slurry to a tailing pond from the tailing buffer pool; by stockpiling for 6 months to 12 months, performing reaction on phosphorite in the phosphate tailings and sulfuric acid in the acid wastewater so as to obtain the soil conditioner with effects of a calcium-magnesia phosphate fertilizer, i.e. tailings with water content of less than 10 percent in dry basis in the tailing pond. The method is simple to operate, enables the waste tailings to be changed into the soil conditioner with utilization value without investing equipment or using drug and simultaneously treats the acid wastewater which pollutes the environment, and has important significance for comprehensive utilization of resources and environment protection.

Description

technical field [0001] The invention belongs to the technical field of beneficiation and chemical industry, in particular to a method for preparing a soil conditioner with phosphate fertilizer effect by using tailings and acid waste water of phosphate ore beneficiation. Background technique [0002] As the development and utilization of high-grade phosphate rock resources become less and less, processing low-grade phosphate rock has become a common method for obtaining phosphate fertilizer raw materials. Low- and medium-grade collophosphine resources account for the majority of phosphate rock resources. Most of the phosphate rocks in Guizhou, Yunnan and other places in my country belong to collophanite. The collophosite is embedded with fine particle size, and apatite is symbiotic with gangue in the form of microcrystals. , monomer dissociation is difficult, and the surface properties of fine collophosite are similar to those of gangue, and flotation separation is difficult, ...

Claims

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Application Information

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IPC IPC(8): C05G1/00
Inventor 李成秀文书明陈炳炎曹沁波龙泽毅程仁举张俊辉徐璐
Owner INST OF MULTIPURPOSE UTILIZATION OF MINERAL RESOURCES CHINESE ACAD OF GEOLOGICAL SCI
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