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Process for preparing sodium potassium silicate solution by predesiliconizing potassium-rich rock

A technology of potassium sodium silicate and potassium-rich rock, which is applied in the direction of aluminum silicate, silicate, alkali metal silicate, etc., and can solve problems such as failure to realize industrial production, solid waste discharge, and impact on process economic benefits. To achieve the effect of increasing the ratio, reducing emissions, and improving economic benefits

Inactive Publication Date: 2010-08-11
昊青薪材(北京)技术有限公司
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] So far, dozens of technological routes for extracting potassium salts from water-insoluble potassium ore reported in China have failed to realize industrial production. The main reason is that K in water-insoluble potassium ore resources 2 The content of O is generally 9% to 14%. If SiO, which accounts for most of the ore composition, 2 、Al 2 o 3 If it is not used reasonably, it will inevitably affect the economic benefits of the entire process, and will also cause a large amount of solid waste discharge

Method used

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  • Process for preparing sodium potassium silicate solution by predesiliconizing potassium-rich rock
  • Process for preparing sodium potassium silicate solution by predesiliconizing potassium-rich rock
  • Process for preparing sodium potassium silicate solution by predesiliconizing potassium-rich rock

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Effect test

Embodiment 1

[0030] Potassium-rich rock raw material 1: pseudoleucine syenite, the chemical composition is as follows (%):

[0031]

[0032] The phase composition of the pseudoleucine syenite is: potassium feldspar 66.1%; muscovite 24.3%; biotite 1.0%; melanite 6.5%; other accessory minerals 2.1%.

[0033] The pseudoleucine syenite ore is crushed and ground, and 5.0 kg of the obtained potassium feldspar powder and 20 L of NaOH solution with a concentration of 18% are ground in a ball mill to form a raw ore slurry with a fineness of -74 μm accounting for 90%; The prepared raw ore slurry was placed in a reaction kettle with a stirring rate of 200rpm, and the temperature was raised to 190°C for a constant temperature reaction for 4 hours; after the reaction was completed, the obtained reaction slurry was vacuum filtered (negative pressure 0.08MPa), and then 16L with a temperature of 85 The filter cake was washed four times with tap water at ℃ to obtain 8.10kg filter cake (water content 50%...

Embodiment 2

[0039] Potassium-rich rock raw material 2: quartz syenite, the chemical composition is as follows (%):

[0040]

[0041] The phase composition of the quartz syenite is: potassium feldspar 70.6%; quartz 18.3%; biotite 6.6%; other accessory minerals 4.5%.

[0042] Quartz syenite ore is crushed and ground, and 7.0 kg of the obtained potassium feldspar powder and 20 L of alkali solution (NaOH / KOH (mass ratio) = 6.42) with a concentration of 25% are ground in a ball mill to make a fineness of -74 μm Accounting for 95% raw ore pulp; place the ground raw ore pulp in a reactor, stir at 200rpm, heat up to 200°C for constant temperature reaction for 2 hours; vacuum filter the obtained reaction slurry after the reaction (negative pressure 0.08 MPa), then wash the filter cake four times with 12L of 85°C tap water to obtain 7.84kg filter cake (water content 50%), dry it at 105°C for 4h, obtain the X-ray powder diffraction analysis results of 3.94kg dry filter cake See image 3 ,Depend...

Embodiment 3

[0048] Potassium-rich ore raw material 3: neon syenite, the chemical composition is as follows (%):

[0049]

[0050] The phase composition of the neonite syenite is: 91.4% microcline, 4.5% neonite, and 3.5% quartz.

[0051]Nihui syenite ore is crushed and ground, and the mixed lye (NaOH / KOH (mass ratio)=2.85) of 16% concentration of gained potassium feldspar powder 6.0kg and 22L is ground in a ball mill to make a fineness of -74 μm accounted for 90% raw ore pulp, put the ground raw ore pulp in the reactor, the stirring rate was 200rpm, and the temperature was raised to 230°C for constant temperature reaction for 3 hours, after the reaction, the obtained reaction slurry was vacuum filtered (negative pressure 0.08MPa), and then wash the filter cake four times with 15L of 85°C tap water to obtain 7.16kg of filter cake (water content 50%), and dry at 105°C for 4h to obtain 3.60kg of dry filter cake, its X-ray powder Diffraction analysis results see Figure 4 . The phase of ...

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Abstract

The invention discloses a process for preparing a sodium potassium silicate solution by predesiliconizing potassium-rich rock. The process comprises the following steps of: crushing and homogenizing potassium-rich rock to prepare potash feldspar powder; grinding the potash feldspar powder and an alkali solution together to prepare original ore pulp; carrying out a constant temperature reaction of the original ore pulp in a reaction at 180-250 DEG C for 1-4h to obtain reaction slurry; and diluting, filtering and reversely washing the reaction slurry to prepare a sodium potassium silicate solution and an Al-rich hydrated sodium aluminum filter cake. The sodium potassium silicate solution can be used as a raw material for preparing inorganic silicon compounds and sylvite products, and the Al-rich hydrated sodium aluminum filter cake is further processed to extract alumina therein. The process solves the problems of great silicon-calcium slag castoff emission and scaled production restriction existing in the potassium-extracting process from water-insoluble potassium ore.

Description

technical field [0001] The invention relates to the field of potassium extraction from water-insoluble potassium ores, in particular to a process for preparing potassium-sodium silicate solution through pre-desilication of potassium-rich rocks. Background technique [0002] Since the end of the 1950s, domestic research on the use of water-insoluble potassium ore to extract potassium salt has been reported from time to time. In the past ten years, due to the sharp increase in market risks caused by the high concentration of international potash production, related research work has attracted increasing attention. [0003] So far, dozens of technological routes for extracting potassium salts from water-insoluble potassium ore reported in China have failed to realize industrial production. The main reason is that K in water-insoluble potassium ore resources 2 The content of O is generally 9% to 14%. If SiO, which accounts for most of the ore composition, 2 、Al 2 o 3 If it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/26C01B33/32
Inventor 刘浩邹丹马鸿文杨雪苏双青
Owner 昊青薪材(北京)技术有限公司
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