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

Purification process of desulfurization gypsum and gypsum raw materials purified through process

A desulfurization gypsum and process technology, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of high energy consumption and complex process, and achieve the effects of low energy consumption, simple process parameters and strong operability

Inactive Publication Date: 2012-08-01
HENAN UNIV OF URBAN CONSTR
View PDF3 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent needs to heat the mother liquor to 80-100°C and cool it to 10-30°C to realize the dissolution-crystallization of gypsum, which requires high energy consumption and complicated process

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Purification process of desulfurization gypsum and gypsum raw materials purified through process
  • Purification process of desulfurization gypsum and gypsum raw materials purified through process
  • Purification process of desulfurization gypsum and gypsum raw materials purified through process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A purification process of desulfurized gypsum, the purification process comprises the following steps:

[0042] Step 1, take the material: manually select the desulfurized gypsum of the coal-fired power plant as the A sample;

[0043] Step 2. Crushing and screening: The sample A selected in step 1 is sent to the crusher for crushing, and sieved with a 200-mesh and 500-mesh vibrating screen, and the vibrating screen time is 10min;

[0044] Step 3. Primary ball milling: take 200 g of desulfurized gypsum powder with a particle size of 200-500 mesh obtained by crushing and screening in step 2, mix it with 600 g of water to prepare a slurry with a solid-liquid weight ratio of 1:3, and send it to the ball mill , then add 0.4g grinding aid to the slurry, and ball mill for 10min;

[0045] Step 4. Pickling: First, adjust the solid-liquid weight ratio of the slurry obtained in the first ball milling in step 3 to 1:6, then place it in a water bath at 30°C, first add 15ml of sulfu...

Embodiment 2

[0065] A purification process of desulfurized gypsum, the purification process comprises the following steps:

[0066] Step 1, take the material: manually select the desulfurized gypsum of the coal-fired power plant as the A sample;

[0067] Step 2, crushing and screening: the sample A selected in step 1 is sent to the crusher for crushing, and sieved with a 200-mesh and 500-mesh vibrating screen, and the vibrating screen time is 20min;

[0068] Step 3. Primary ball milling: take 200 g of desulfurized gypsum powder with a particle size between 200 and 500 meshes obtained by crushing and sieving in step 2, mix it with 800 g of water to prepare a slurry with a solid-liquid weight ratio of 1:4, and send it to the ball mill , then add 0.1 g grinding aid to the slurry, and ball mill for 15min;

[0069] Step 4. Pickling: First, adjust the solid-to-liquid weight ratio of the slurry obtained in the first ball milling in step 3 to 1:8, then place it in a water bath at 40°C, first add ...

Embodiment 3

[0089] A purification process of desulfurized gypsum, the purification process comprises the following steps:

[0090] Step 1, take material: manually select desulfurized gypsum of coal-fired power plant as B sample;

[0091] Step 2, crushing and screening: the sample B selected in step 1 is sent to the crusher for crushing, and sieved with a 200-mesh and 500-mesh vibrating screen, and the vibrating screen time is 30 minutes;

[0092] Step 3. Primary ball milling: take 200 g of desulfurized gypsum powder with a particle size of 200-500 mesh obtained by crushing and screening in step 2, mix it with 1000 g of water to prepare a slurry with a solid-liquid weight ratio of 1:5, and send it to the ball mill , then add 0.6g grinding aid to the slurry, and ball mill for 20min;

[0093] Step 4. Pickling: firstly adjust the solid-liquid weight ratio of the slurry obtained in the first ball milling in step 3 to 1:10, then place it in a water bath at 20°C, first add 20ml of sulfuric acid...

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
whitenessaaaaaaaaaa
whitenessaaaaaaaaaa
whitenessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a purification process of desulfurization gypsum and gypsum raw materials purified through the process, which solve the problems that the existing purification process of desulfurization gypsum has large energy consumption and complex process, and the purified product has low purity. The purification process of the desulfurization gypsum comprises the following steps of material extracting, grinding and screening, primary ball-milling, scouring, flotation, clarification, and secondary ball-milling; and integrates physics, chemistry, mineral separation, powder preparation and other processing technologies into a whole. The product prepared by the process has high quality, and has the whiteness reaching to 93-95 percent. The purification process of the desulfurization gypsum and the gypsum raw materials purified through the process have the advantages that the process is simple, the practicability is strong, the energy consumption is low, the impurities extracted from the gypsum are fewer, and the granularity of the product is more uniform.

Description

technical field [0001] The invention relates to a process for purifying desulfurization gypsum, in particular to a process for purifying desulfurization gypsum, which solves the problems of high energy consumption, complicated process and low purity of the purified product in the existing purification process of desulfurization gypsum, and a purified gypsum gypsum purification process. Gypsum raw material. Background technique [0002] Desulfurized gypsum is a by-product of flue gas desulfurization in power, steel and other industries. In the limestone-gypsum wet desulfurization process, 2.7 tons of desulfurized gypsum are produced for every ton of sulfur dioxide absorbed; in 2010, 700 million kilowatts of coal-fired power generating units in my country were installed with flue gas desulfurization devices, producing nearly 100 million tons of wet desulfurization. By-product - desulfurized gypsum. The amount of desulfurized gypsum discharged is huge, the accumulation is seri...

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): C01F11/46
Inventor 汪潇杨留栓王宇斌刘富玲朱新峰
Owner HENAN UNIV OF URBAN CONSTR
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