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

Synergetic preparation of industrial waste gypsum mortar with industrial exhaust gas and toxicity solution

A technology of industrial waste gypsum and industrial exhaust gas, which is applied in the field of solid waste utilization to achieve the effect of solving toxicity and improving strength

Pending Publication Date: 2019-12-10
SHANDONG UNIV
View PDF11 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been reports on the preparation of hydroxyapatite from desulfurized gypsum, but there is no research on the use of industrial waste gypsum to generate hydroxyapatite to consolidate the tailing ore and solve its toxicity in situ

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 example 1

[0047] First use industrial waste gas to pretreat industrial waste gypsum. Industrial waste gypsum is firstly dried by industrial tail gas to remove moisture and part of crystal water in industrial waste gypsum, so that the main component of industrial waste gypsum, calcium sulfate dihydrate, is transformed into calcium sulfate hemihydrate. , so that the industrial waste gypsum has gelling activity, and the pretreated industrial waste gypsum can be obtained after certain grinding;

[0048] Then prepare raw materials for industrial waste gypsum tailings sand mortar, and weigh the raw materials according to the following proportions: 100 parts of pretreated industrial waste gypsum, 10 parts of diammonium hydrogen phosphate, 150 parts of tailings sand, 150 parts of quartz sand, 55 parts of water, gypsum 0.3 parts of retarder, 0.2 parts of cellulose ether.

[0049] Prepare industrial waste gypsum-based mortar again:

[0050] (1) First, diammonium hydrogen phosphate was dissolved ...

Embodiment example 2

[0064] First use industrial waste gas to pretreat industrial waste gypsum. Industrial waste gypsum is firstly dried by industrial tail gas to remove moisture and part of crystal water in industrial waste gypsum, so that the main component of industrial waste gypsum, calcium sulfate dihydrate, is transformed into calcium sulfate hemihydrate. , so that the industrial waste gypsum has gelling activity, and the pretreated industrial waste gypsum can be obtained after certain grinding;

[0065] Then prepare raw materials for industrial waste gypsum tailings sand mortar, and weigh the raw materials according to the following mixing ratio: Weigh the raw materials according to the following mixing ratio: 100 parts of pretreated industrial waste gypsum, 20 parts of diammonium hydrogen phosphate, 150 parts of tailing sand, quartz 150 parts of sand, 55 parts of water, 0.3 parts of gypsum retarder, and 0.2 parts of cellulose ether.

[0066] The preparation process of above-mentioned indus...

Embodiment example 3

[0081] First use industrial waste gas to pretreat industrial waste gypsum. Industrial waste gypsum is firstly dried by industrial tail gas to remove moisture and part of crystal water in industrial waste gypsum, so that the main component of industrial waste gypsum, calcium sulfate dihydrate, is transformed into calcium sulfate hemihydrate. , so that the industrial waste gypsum has gelling activity, and the pretreated industrial waste gypsum can be obtained after certain grinding;

[0082] Then prepare raw materials for industrial waste gypsum tailings sand mortar, and weigh the raw materials according to the following mixing ratio: Weigh the raw materials according to the following mixing ratio: weigh the raw materials according to the following mixing ratio: 100 parts of pretreated industrial waste gypsum, diammonium hydrogen phosphate 10 parts, 10 parts of cement, 150 parts of tailings sand, 150 parts of quartz sand, 55 parts of water, 0.3 parts of gypsum retarder, and 0.2 p...

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
Specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a synergetic preparation of industrial waste gypsum mortar with industrial exhaust gas and a toxicity solution. Lingering warmth in the industrial exhaust gas is used for converting dihydrate gypsum in industrial waste gypsum into hemihydrate gypsum to prepare desulfurized gypsum binding material. According to the solution,the industrial waste gypsum and tailing sand are used as basic raw materials, waste heat of the industrial waste gas is used for making the industrial waste gypsum higher in gelling property, the simultaneouslyadded diammonium hydrogen phosphate and calcium ions in the industrial waste gypsum generate hydroxyapatite, the mechanical property of the industrial waste gypsum-based bindingmaterialcan be significantlyimproved, at the same time, OH-groupin the hydroxyapatite can be replaced by fluoride, chloride, and carbonate ions to form fluoroapatite or chloroapatite,the calcium ions are replaced through ion exchange reaction by a variety of metal ions to form M apatite corresponding to the metal ions, harmful substances dissolved in the industrial waste gypsum and the tailing sand are absorbed, and the problem of toxicity can be effectivelysolved.

Description

technical field [0001] The invention relates to a method for synergistically preparing industrial waste gypsum mortar from industrial tail gas and a toxicity solution, and relates to the field of solid waste utilization. Background technique [0002] Industrial waste gypsum is industrial waste residue mainly composed of calcium sulfate. The waste gypsum is in powder form, 80% of which is calcium sulfate, as well as silicon, aluminum and iron. Industrial waste gypsum includes sintered desulfurization gypsum, phosphogypsum and fluorine gypsum. Typically, for every ton of phosphoric acid produced, five tons of phosphogypsum are discharged. [0003] Gypsum forms different types of hemihydrate and anhydrous gypsum under different dehydration conditions. Christensen believes that there are five different basic phases of gypsum: dihydrate gypsum CaSO 4 2H 2 O, dehydration to form high-strength gypsum α-CaSO 4 0.5H 2 O. Construction gypsum β-CaSO 4 0.5H 2 O, soluble anhydrit...

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
IPC IPC(8): C04B28/14C04B11/26C04B11/02
CPCC04B28/142C04B28/143C04B28/144C04B11/264C04B11/262C04B11/26C04B11/02C04B2201/50C04B2111/00784C04B22/16C04B18/12C04B14/06C04B24/383C04B2103/22C04B7/02
Inventor 李召峰王衍升林春金齐延海张健
Owner SHANDONG 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