Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of method of extracting potassium chloride crude product in potassium halite by triboelectric separation

A technology of triboelectric separation of potash salt ore, applied in the direction of alkali metal chloride, etc., to achieve high yield, strong operability, and good separation effect

Active Publication Date: 2017-10-20
CHANGSHA DESIGN & RES INST OF CHEM IND MIN
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no relevant report on the extraction of potassium chloride products from potash rock salt mines by triboelectric separation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Crushing: The solid potassium halite (main components: KCl and NaCl, of which, the mass percentage of KCl is 43%, and the mass percentage of NaCl is 55%) is subjected to two-stage closed-circuit crushing, and the particle size range of the controlled material is 1~2mm; (2) Grinding: Grind the crushed material obtained in step (1) until the mass content of the material ≤ 200 mesh is 90%; (3) Surface pretreatment: Grind the material obtained in step (2) The material after grinding is sent to the preprocessor, and 20g sodium hexametaphosphate / t potassium halite is added to mix evenly; (4) Electrostatic separation: the material after adding sodium hexametaphosphate in step (3) is sent to the electric separator , potassium chloride was selected by triboelectricity, and the crude product of potassium chloride was obtained, the content of KCl was 90%, and the yield of KCl was 89%.

Embodiment 2

[0026] (1) Crushing: The solid potassium halite (main components: KCl and NaCl, wherein the mass percentage of KCl is 45%, and the mass percentage of NaCl is 50%) is subjected to two-stage closed-circuit crushing, and the particle size range of the controlled material is 1~1.5mm; (2) Grinding: Grinding the crushed material obtained in step (1) until the mass content of the material is ≤200 mesh to 90%; (3) Surface pretreatment: Grinding the material in step (2) The obtained ground material is sent to the preprocessor, and 20g of salicylic acid / t potassium halite is added to mix evenly; (4) Electrostatic separation: the material after adding salicylic acid in step (3) is sent to the electric separator, Triboelectrically select potassium chloride to obtain a crude product of potassium chloride with a KCl content of 89.4% and a KCl yield of 90%.

Embodiment 3

[0028] (1) Crushing: the solid potassium halite (main components: KCl, NaCl and KCl MgCl 2 ·6H 2 O, wherein, KCl mass percentage content is 30%, NaCl mass percentage content is 60%, KCl MgCl 2 ·6H 2 O mass percentage is 8%) for secondary closed-circuit crushing, and the particle size range of the controlled material is 1 to 1.5mm; (2) Grinding: Grinding the crushed material obtained in step (1) to a size of ≤200 mesh The mass content of the material is 90%; (3) surface pretreatment: send the ground material obtained in step (2) to the preprocessor, add 200g dodecylamine / t potassium halite and mix evenly; (4) electrostatic Separation: The material after adding dodecylamine in step (3) is sent to an electric separator, and potassium chloride is triboelectrically separated to obtain a crude potassium chloride product with a KCl content of 75.4% and a KCl yield of 90%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for triboelectric separation and extraction of crude potassium chloride from potash halite, comprising the following steps: (1) crushing: crushing solid potash halite, and controlling the particle size range of the material to 1-2mm; (2) grinding Ore: Grind the crushed material obtained in step (1) until the mass content of the material ≤ 200 mesh is ≥ 90%; (3) Surface pretreatment: send the ground material obtained in step (2) into the pre-processing Processor, add surface modifier and mix evenly; (4) Electrostatic separation: send the material after adding surface modifier in step (3) into the electric separator, triboelectrically select potassium chloride, and obtain crude potassium chloride product . The present invention does not need to use saturated mother liquor, and there are no influencing factors such as temperature and pressure, and finally no sewage is generated, the process flow is simple, the operability is strong, no pollution, the separation effect is good, and the yield can be as high as 90%; the obtained chlorination Potassium crude products are of good quality, and the KCl content can be as high as 90%, with obvious economic benefits.

Description

technical field [0001] The invention relates to a method for extracting a crude potassium chloride product from a potash halite, in particular to a method for extracting a crude potassium chloride product from a potash halite by friction electric separation. Background technique [0002] Potassium fertilizer is one of the three basic fertilizers (nitrogen, phosphorus and potassium) in agriculture. At present, the potassium-deficient cultivated land area in China accounts for 60% of the total cultivated land area, which seriously affects the yield and quality of crops. China is the world's largest consumer of potash fertilizer. According to statistics from the China Inorganic Salt Industry Association, the total apparent consumption of potash fertilizer in China reached 17.42 million tons in 2014, an increase of 19.1% over 2013. Among the seven most scarce mineral resources in China (oil and gas, iron-rich ore, potassium salt, copper ore, bauxite, manganese ore, and chromium ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/08
Inventor 谭之海汤建良胡勇季荣杨清
Owner CHANGSHA DESIGN & RES INST OF CHEM IND MIN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com