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Method for preparing potash fertilizer and alumina silicate from potash feldspar

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, simple equipment and low investment

Inactive Publication Date: 2014-05-28
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) Grinding the raw material potassium feldspar ore to a fineness of -100 mesh potassium feldspar powder;

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

[0034] (3) The material obtained by the reaction in step (2) is added to fresh water equivalent to 1 times the weight of the raw material potassium feldspar powder for leaching, stirred for 0.5h, and the soluble potassium salt is dissolved into the liquid phase;

[0035] (4) performing solid-liquid separation on the material obtained in step (3);

[0036] (5) Evaporating and concentrating the liquid phase obtained in step (4) for preparing potassium fertilizer;

[0037] (6) adding a sulfuric acid so...

Embodiment 2

[0042] This embodiment includes the following steps:

[0043] (1) Grinding the raw material potassium feldspar ore to a fineness of -50 mesh potassium feldspar powder;

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

[0045] (3) The material obtained by the reaction in step (2) is added to fresh water equivalent to 10 times the weight of the raw material potassium feldspar powder for leaching, stirred for 8 hours, and the soluble potassium salt is dissolved into the liquid phase;

[0046] (4) performing solid-liquid separation on the material obtained in step (3);

[0047] (5) Evaporating and concentrating the liquid phase obtained in step (4) to prepare potassium fertilizer;

[0048] (6) Add 15wt% hydrochloric aci...

Embodiment 3

[0053] This embodiment includes the following steps:

[0054] (1) Grinding the raw material potassium feldspar ore to a fineness of -400 mesh potassium feldspar powder;

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

[0056] (3) The material obtained by the reaction in step (2) is added to fresh water equivalent to 1 times the weight of the raw material potassium feldspar ore powder for leaching, stirred for 0.5h, and the soluble potassium salt is dissolved into the liquid phase;

[0057] (4) performing solid-liquid separation on the material obtained in step (3);

[0058] (5) Evaporating and concentrating the liquid phase obtained in step (4) to prepare potassium fertilizer;

[0059] (6...

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Abstract

The invention provides a method for preparing a potash fertilizer and alumina silicate from potash feldspar. The method comprises the following steps: levigating potash feldspar ore into potash feldspar ore powder with a size of 50 to 400 meshes, uniformly mixing the potash feldspar ore powder with 20 to 60 wt% strong alkali aqueous solution according to a mass ratio of 1: 0.5-2.5 and carrying out a hydro-thermal reaction in a high pressure vessel, wherein reaction temperature is 100 to 300 DEG C, reaction pressure is 0.1 to 6 MPa, and reaction time is 1 to 24 h; adding fresh water with the weight being 0.5 to 10 times the weight of the potash feldspar ore powder into a material obtained after the reaction for infiltration of the material, then subjecting a material obtained after infiltration to solid-liquid separation and evaporating and concentrating a liquid phase for preparation of the potash fertilizer; adding 5 to 50 wt% acid solution into a solid phase to dissolve the solid phase, adding aluminum salt mother liquor into an obtained solution, carrying stirring for uniform mixing and then carrying out deposition; and carrying out solid-liquid separation and drying a solid at a temperature of 80 to 300 DEG C so as to obtain an alumina silicate product. The method has the advantages of short process flow, low energy consumption, high yield and comprehensive development and utilization of potassium, silicon and aluminum components in potash 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%, both of which have develo...

Claims

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Application Information

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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
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