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A comprehensive chemical and metallurgical utilization method for joint development of phosphogypsum and nepheline mines

A chemical metallurgy, phosphogypsum technology, applied in phosphate fertilizer, application, superphosphate and other directions, can solve the problem of not being able to open and use, and achieve the effect of protecting the environment and improving the value of use

Active Publication Date: 2020-06-16
戴元宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also nepheline deposits in Sichuan, Henan and other places in my country, but due to the structure of potassium aluminum silicate double salt of this mineral, it cannot be opened and utilized by general metallurgical, physical and chemical methods

Method used

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  • A comprehensive chemical and metallurgical utilization method for joint development of phosphogypsum and nepheline mines

Examples

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Comparison scheme
Effect test

example 1

[0046] Example 1: The comprehensive utilization of chemical metallurgy jointly developed by Kunyang Phosphate Fertilizer Plant and Gejiu Xiashi Mine

[0047] 1. Analysis of main components of raw materials:

[0048]

[0049] 2. Process flow:

[0050] After the phosphogypsum and nepheline ore crushed by the jaw crusher and finely ground by the ball mill are fully mixed, they are roasted in the reverberatory furnace to carry out the double decomposition reaction, and the process is fully stirred to promote the complete reaction. After the reaction is completed, the cooled reactant is placed in a stainless steel pressurized jacketed heating reactor, and water (slag washing water) is added to pressurize and increase the temperature for cooking to extract potassium sulfate and aluminum sulfate. After the leaching is completed, the leaching material is subjected to liquid-solid separation in the anti-corrosion plate and frame filter press: the leaching liquid is sent to the proc...

example 2

[0081] Example 2: The comprehensive utilization of chemical metallurgy in the joint development of phosphogypsum by Honghe Phosphate Fertilizer Plant and Gejiu Nepheline Mine

[0082] 1. Analysis of main components of raw materials:

[0083]

[0084] 2. Process flow:

[0085] After the phosphogypsum and nepheline ore crushed by the jaw crusher and finely ground by the ball mill are fully mixed, they are roasted in the reverberatory furnace to carry out the double decomposition reaction, and the process is fully stirred to promote the complete reaction. After the reaction is completed, the cooled reactant is placed in a stainless steel pressurized jacketed heating reactor, and water (slag washing water) is added to pressurize and increase the temperature for cooking to extract potassium sulfate and aluminum sulfate. After the leaching is completed, the liquid-solid separation of the leaching material is carried out in the anti-corrosion plate and frame filter press: the lea...

example 3

[0116] Example 3: The comprehensive utilization of chemical metallurgy jointly developed by Xuanwei Phosphorus Chemical Plant and Huili Nepheline Mine

[0117] 1. Analysis of main components of raw materials:

[0118]

[0119] 2. Process flow:

[0120]After the phosphogypsum and nepheline ore crushed by the jaw crusher and finely ground by the ball mill are fully mixed, they are roasted in the reverberatory furnace to carry out the double decomposition reaction, and the process is fully stirred to promote the complete reaction. After the reaction is completed, the cooled reactant is placed in a stainless steel pressurized jacketed heating reactor, and water (slag washing water) is added to pressurize and increase the temperature for cooking to extract potassium sulfate and aluminum sulfate. After the leaching is completed, the liquid-solid separation of the leaching material is carried out in the anti-corrosion plate and frame filter press: the leaching liquid is sent to t...

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Abstract

The invention relates to a chemical metallurgy comprehensive utilization method for phosphogypsum and nepheline ore joint development. The method is characterized in that sulfate radical in phosphogypsum is grafted onto aluminum and potassium in nepheline ore through a special double-decomposition reaction, thereby obtaining activated aluminum oxide and a potassium compound fertilizer through solution leaching, separation and conversion; and calcium in the phosphogypsum is combined with the silicate radical in the nepheline ore to obtain calcium silicate having wide application ranges and high values. The specific process comprises the following steps: grinding the phosphogypsum and the nepheline ore, conducting uniform mixing and roasting, performing pressure leaching and boiling on the roasted materials with water used as a leaching agent for aluminum and potassium leaching, and performing solid-liquid separation, wherein the solid phase is washed to obtain the calcium silicate product, and the solution phase is a leached potassium sulfate and aluminum sulfate solution; and treating the leached solution with ammonium hydrogen carbonate for aluminum precipitation and potassium separation, wherein the solid phase is aluminum carbonate hydroxide, and is dried and the dried material is calcined to obtain the activated aluminum oxide product, and the liquid phase is potassium sulfate and ammonium sulfate mixed solution, and is concentrated, then the concentrated material is absorbed with a phosphorus material (powdered rock phosphate, calcium superphosphate or calcium triple superphosphate) and ageing, pile turning and drying are conducted to obtain a nitrogen / phosphorus / potassium compound fertilizer.

Description

technical field [0001] The invention belongs to a chemical metallurgical technology for processing dressing, smelting, chemical slag materials and refractory smelting symbiotic ores, and specifically relates to the huge amount of waste residue phosphogypsum produced in the chemical industry and the huge potassium-containing, An effective combined comprehensive treatment and utilization method of alneline ore. Background technique [0002] The treatment and utilization of phosphogypsum is a difficult problem in the chemical industry today. With the development of the chemical industry, the phosphogypsum produced by the phosphorus chemical industry in my country has become the largest waste in the chemical industry. The ten provinces and cities headed by Yunnan have produced 40-70 million tons per year since 2010 and are increasing year by year. Arbitrary stacking of the waste slag not only occupies a large amount of land, wastes precious sulfur resources, but also pollutes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/24C01F7/02C05C3/00C05D1/02C05G1/00
CPCC01B33/24C01F7/02C05B1/02C05B17/00C05C3/00C05D1/02C05D3/02
Inventor 戴元宁
Owner 戴元宁
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