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A kind of method utilizing potassium feldspar to prepare potash fertilizer and aluminum silicate

A technology of potassium feldspar and aluminum silicate, applied in the field of development and utilization of potassium feldspar, can solve the problem of not providing a comprehensive utilization and utilization scheme, and achieve the effects of low production cost, improved utilization rate and simple equipment

Inactive Publication Date: 2016-03-09
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can only use potassium in potassium feldspar alone, but does not provide a comprehensive utilization plan for silicon, aluminum and other elements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment includes the following steps:

[0032] (1) Grind the raw potash feldspar ore to a fineness of -100 mesh potash feldspar ore powder;

[0033] (2) Mix the potassium feldspar ore powder obtained in step (1) with a sodium hydroxide solution with a mass concentration of 30 wt% in a mass ratio of 1.0:0.5, and then conduct a hydrothermal reaction in a high-pressure vessel. The temperature is 200℃, the pressure is 4MPa, and the reaction time is 4h;

[0034] (3) Add the material obtained by the reaction in step (2) to fresh water equal to 1 times the weight of the raw potash feldspar ore powder for leaching, stirring for 0.5h, and dissolving the soluble potassium salt to the liquid phase;

[0035] (4) Solid-liquid separation of the materials obtained in step (3);

[0036] (5) The liquid phase obtained in step (4) is evaporated and concentrated to prepare potash fertilizer;

[0037] (6) Add a sulfuric acid solution with a mass concentration of 15 wt% to the solid phase obta...

Embodiment 2

[0042] This embodiment includes the following steps:

[0043] (1) Grind the raw potash feldspar ore to a fineness of -50 mesh potash feldspar ore powder;

[0044] (2) Mix the potassium feldspar ore powder obtained in step (1) with a potassium hydroxide solution with a concentration of 60wt% in a mass ratio of 1.0:1.5, and then conduct a hydrothermal reaction in a high-pressure vessel. The reaction temperature The temperature is 300°C, the pressure is 6MPa, and the reaction time is 4h;

[0045] (3) Add the material obtained from the reaction in step (2) to 10 times the weight of the raw potash feldspar ore powder for leaching, and stir for 8 hours to dissolve the soluble potassium salt to the liquid phase;

[0046] (4) Solid-liquid separation of the materials obtained in step (3);

[0047] (5) Evaporate and concentrate the liquid phase obtained in step (4) to prepare potash fertilizer;

[0048] (6) Add 15wt% hydrochloric acid solution to the solid phase obtained in step (4) to dissolve i...

Embodiment 3

[0053] This embodiment includes the following steps:

[0054] (1) Grind the raw potash feldspar ore to a fineness of -400 mesh potash feldspar ore powder;

[0055] (2) Mix the potassium feldspar ore powder obtained in step (1) with a sodium carbonate solution with a mass concentration of 30 wt% in a mass ratio of 1.0:2.5, and then conduct a hydrothermal reaction in a high-pressure vessel. The reaction temperature It is 100℃, the pressure is 6MPa, and the reaction time is 24h;

[0056] (3) Add the material obtained by the reaction in step (2) to fresh water equal to 1 times the weight of the raw potash feldspar ore powder for leaching, stirring for 0.5h, and dissolving the soluble potassium salt to the liquid phase;

[0057] (4) Solid-liquid separation of the materials obtained in step (3);

[0058] (5) Evaporate and concentrate the liquid phase obtained in step (4) to prepare potash fertilizer;

[0059] (6) Add a nitric acid solution with a mass concentration of 15 wt% to the solid phas...

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Abstract

A method for preparing potassium fertilizer and aluminum silicate by utilizing potassium feldspar, the steps are as follows: grind potassium feldspar ore to -50~-400 mesh potassium feldspar powder, and 20~60wt% strong alkali solution by mass ratio Mix evenly at a ratio of 1:0.5~2.5, then carry out hydrothermal reaction in a high-pressure vessel, the reaction temperature is 100~300°C, the pressure is 0.1~6MPa, and the reaction time is 1~24h; 0.5~10 times the weight of potassium feldspar ore powder is soaked in fresh water, and then the obtained material is separated from solid and liquid, and the liquid phase is evaporated and concentrated for the preparation of potassium fertilizer; 5~50wt% acid solution is added to the solid phase Dissolve, add aluminum salt mother liquor to the obtained solution, stir evenly, and precipitate; separate solid and liquid, dry the solid at 80~300°C to obtain aluminum silicate product. The invention has short technological process, low energy consumption and high yield, and at the same time comprehensively develops and utilizes potassium, silicon and aluminum components in potassium feldspar.

Description

technical field [0001] The invention relates to a method for developing and utilizing potassium feldspar, in particular to a method for preparing potash fertilizer and aluminum silicate by using potassium feldspar. Background technique [0002] Potassium salt resources in my country are poor, but potassium feldspar resources are abundant, widely distributed, large reserves, and high potassium content, generally greater than 10% (in K 2 O meter), is an ideal raw material for comprehensive utilization of potassium salt production. [0003] Potassium feldspar is a Si-AL-O framework structure, and its molecular formula is K[AlSi 3 o 8 ], its composition is a network structure, extremely stable, under normal temperature and pressure, it is hardly decomposed by acid and alkali. Therefore, the development and utilization of potassium feldspar is limited. [0004] The silicon content in pure potassium feldspar is 64.7% and the aluminum content is 18.4%, all of which have develop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05D1/04C01B33/26
Inventor 谢超高文远汤建良郑贤福申睿
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN