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

Method for preparing potash fertilizer by utilizing low-heating-value potassium-rich coal gangue

A technology of coal gangue and low calorific value, applied in potash fertilizers, inorganic fertilizers, fertilization devices, etc.

Inactive Publication Date: 2012-08-15
SHANGHAI UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another object of the present invention is to solve the problem of reutilization of solid waste

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

[0019] The present embodiment uses the method for producing potash fertilizer with low calorific value potassium-rich coal gangue, its specific process and steps:

[0020] a. The low calorific value potassium-rich coal gangue is crushed, ball milled to 200 mesh, washed with 15% sulfuric acid at a solid-to-liquid ratio of 1:8 to extract the iron element, the pickling solution is concentrated, and dried to obtain solid ferrous sulfate that can be used as a water purifier. The filter cake is dried and ball milled for later use.

[0021] b. The low calorific value potassium-rich coal gangue powder after iron removal is mixed with industrial pure sodium hydroxide according to a certain weight ratio, that is, coal gangue powder: sodium hydroxide = 10:5 and stirred evenly.

[0022] c. Put the mixed powder into a ceramic sagger, and bake it in a high-temperature electric furnace at 600°C for 90 minutes. After cooling with the furnace, take out the powder and grind it fully in a bal...

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

PropertyMeasurementUnit
heating valueaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a potash fertilizer by utilizing low-heating-value potassium-rich coal gangue. The method comprises the following steps of: smashing and deironing the coal gangue to obtain potassium-rich coal gangue powder with low iron content, mixing and roasting the potassium-rich coal gangue powder and industrial pure sodium hydroxide at the temperature of 500-650 DEG C, stirring and mixing the roasted clinkers with water, and standing, ageing, filtering the roasted clinkers and the water to obtain a filter cake and a mother liquor containing potassium. The mother liquor containing potassium is subjected to CO2 acidification and neutralization as well as extraction and separation to obtain potash fertilizer K2CO3. The method can be used for obtaining by-products, namely ferrisulphas purifier and a raw material SiO2 which can be used for ceramics or fireproofing materials. The raw material SiO2 contains a certain amount of pulverized coal, has a certain heating value and can be used for reducing the energy consumption in the production process of the ceramics or the fireproofing materials. The method can be used for fully utilizing the main valuable elements in the low-heating-value potassium-rich coal gangue, is simple in technological process and is free from environment pollution and secondary trash discharge; and the raw materials used by the method are industrial waste and are wide in source, and thus the method is convenient to implement and popularize.

Description

technical field [0001] The invention relates to a method for preparing potassium fertilizer from low calorific value potassium-rich coal gangue, which belongs to the field of comprehensive utilization of solid waste. Background technique [0002] my country is a large country of coal. The coal gangue produced in the process of coal production has become the solid waste with the largest amount of production and accumulation in my country's industrial solid waste. With the mining of coal, it will increase at a rate of 150 million to 200 million tons per year. . However, the utilization rate of coal gangue in our country is low. At present, the resource utilization of coal gangue mainly focuses on the use of aluminum, silicon, and iron elements inside, such as CN102180491A Patent A method for extracting alumina from coal gangue: broken coal Gangue and sodium carbonate are mixed in a certain proportion, and high-purity alumina is obtained through roasting, leaching and other ope...

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 Applications(China)
IPC IPC(8): C05D1/00
Inventor 甄强宋绍雷王亚丽李榕孙凌云
Owner SHANGHAI UNIV
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