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A method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate

A technology of phosphorus tailings and phosphorus concentrate, which is applied in the treatment of calcium carbonate/strontium/barium and phosphate materials, and can solve problems that threaten human and animal safety, environmental pollution, land degradation, etc.

Active Publication Date: 2016-07-27
贵州盛源新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the purpose of the present invention is to provide a method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate, so as to solve the problem of a large amount of accumulation of phosphorus tailings, causing a large amount of land to be occupied, bringing environmental pollution, and causing land pollution. Degradation, destruction of vegetation, threats to the safety of humans and animals

Method used

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  • A method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate
  • A method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate

Examples

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Embodiment 1

[0061] A method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate comprises the following steps:

[0062] (1) Calcination: Put the phosphorus tailings into a calciner and calcinate at a temperature of 900°C for 50 minutes to obtain calcined material and carbon dioxide gas, pass the carbon dioxide gas into the absorption tower, use ammonia water to absorb, and obtain ammonium carbonate solution;

[0063] (2) Digestion: Send the calcined material and hot water at a temperature of 60°C into the digestion tank and mix them. The weight ratio of the calcined material and hot water is 1:2, and the digestion treatment time is 30 minutes to obtain a digested slurry;

[0064] (3) Leaching: Put the digested slurry and ammonium nitrate solution into the leaching tank at a weight ratio of 17:32 and mix them, then stir for 70 minutes at a temperature of 90°C, and pass the ammonia gas generated by the reaction into the absor...

Embodiment 2

[0071] A method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate comprises the following steps:

[0072] (1) Calcination: Put the phosphorus tailings into a calciner and calcinate at a temperature of 1000°C for 70 minutes to obtain calcined material and carbon dioxide gas, pass the carbon dioxide gas into the absorption tower, use ammonia water to absorb, and obtain ammonium carbonate solution;

[0073] (2) Digestion: Send the calcined material and hot water at a temperature of 100°C into the digestion tank for mixing, the weight ratio of the calcined material and hot water is 7:10, and the digestion treatment time is 50 minutes to obtain a digested slurry;

[0074] (3) Leaching: Put the digested slurry and ammonium nitrate solution into the leaching tank at a weight ratio of 15:25 and mix them, then stir for 50 minutes at a temperature of 80°C, and pass the ammonia gas generated by the reaction into the abso...

Embodiment 3

[0081] A method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate comprises the following steps:

[0082] (1) Calcination: Put the phosphorus tailings into a calciner and calcinate at a temperature of 950°C for 55 minutes to obtain calcined material and carbon dioxide gas, pass the carbon dioxide gas into the absorption tower, use ammonia water to absorb, and obtain ammonium carbonate solution;

[0083] (2) Digestion: send the calcined material and hot water at a temperature of 90°C into the digestion tank for mixing, the weight ratio of the calcined material to hot water is 6:10, and the digestion treatment time is 45 minutes to obtain a digested slurry;

[0084] (3) Leaching: Put the digested slurry and ammonium nitrate solution into the leaching tank at a weight ratio of 16:30 and mix them, then stir for 60 minutes at a temperature of 85°C, and pass the ammonia gas generated by the reaction into the absorpt...

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Abstract

The invention discloses a method for extracting phosphor concentrate from phosphor tailings and co-producing magnesium-containing calcium carbonate. The method comprises the following steps: burning phosphor tailings at a high temperature, adding hot water into the tailings to perform a digestion treatment, then adding an ammonium nitrate solution, stirring, extracting calcium and magnesium at a high temperature to obtain leachate and slag, drying the slag to obtain phosphor concentrate, adding an ammonium carbonate solution into the leachate, separating the precipitate from the solution, and drying the precipitate to obtain the magnesium-containing calcium carbonate. The phosphor tailings are taken as the main raw material to produce magnesium-containing calcium carbonate and phosphor concentrate, thus the lands occupied by phosphor tailings can be saved, moreover the environmental pollution can be avoided at the same time, and the quality of the obtained phosphor concentrate is high.

Description

technical field [0001] The invention relates to the technical field of recycling phosphorus tailings, in particular to a method for extracting phosphorus concentrate from phosphorus tailings and co-producing magnesium-containing calcium carbonate. Background technique [0002] Phosphate rock is a non-renewable resource. Although my country's phosphate rock resources are relatively rich, the grade of phosphate rock is low. Most of the phosphate rock must be enriched by ore dressing before it can be used to produce phosphoric acid and high-concentration phosphate fertilizers. Due to the There are many impurities in the phosphate rock, which leads to a low actual utilization rate of phosphate rock in our country, and the demand for phosphorus in our country is particularly large. After years of mining and utilization, our country's phosphate rock resources have been depleted day by day. [0003] Phosphorus tailings are unutilized solid waste discharged from phosphate ore flotati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/01C01F11/18
Inventor 顾春光张钦张富强卢玉莲张澜曦韩瑜张仁秀
Owner 贵州盛源新材料股份有限公司