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

A phosphogypsum-based cementitious material and its application in mine tailings filling

A technology of mine tailings and phosphogypsum, which is applied in the direction of filling materials, mining equipment, safety devices, etc., can solve the problems of large cement unit consumption, high cement unit consumption, and high filling cost, and solve the problem of land occupation and utilization of ore stacking. Enhanced pathways and wide-ranging effects

Active Publication Date: 2016-01-20
CHINA THREE GORGES UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the traditional tailings consolidation and filling technology, cement is generally used as a consolidation material to solidify the tailings. However, the unit consumption of cement is very large, resulting in high tailings filling costs. The filling cost accounts for 10% of the total mining cost. About 30%, cement glue tailing sand filling has problems such as difficult dehydration, low strength of consolidated body, large cement unit consumption, and high filling cost, which are also the main factors that make tailings filling technology difficult to promote in my country

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
  • A phosphogypsum-based cementitious material and its application in mine tailings filling
  • A phosphogypsum-based cementitious material and its application in mine tailings filling
  • A phosphogypsum-based cementitious material and its application in mine tailings filling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use quicklime water to adjust the pH value of phosphogypsum to 6.8, dry and grind at 60°C until the specific surface area of ​​phosphogypsum is 821.3m 2 / kg. According to the ratio in Table 1: phosphogypsum: red mud: phosphorus slag: clinker: activator to prepare phosphogypsum-based mine tailings filling cementitious material, wherein the percentages are mass percentages, based on the total mass of the cementitious material, the gelatinous Total mass of cementitious material = mass of phosphogypsum + mass of red mud + mass of phosphorus slag + mass of clinker, activator dosage = mass of activator / total mass of cementitious material, ratio of cement to mineral = total mass of cementitious material / mass of copper tailings , concentration=(cementation material mass+copper tailings mass) / (cementation material mass+copper tailings mass+water).

[0034] This experiment is copper tailings cementation experiment. Prepare the amount of copper tailings slurry and stirring capac...

Embodiment 2

[0039] Use lime water to adjust the pH value of phosphogypsum to 7.0, dry and grind at 60°C for activation, and the measured specific surface area of ​​phosphogypsum is 831.7m 2 / kg. According to Table 2 proportioning: phosphogypsum: red mud: phosphorus slag: clinker: activator to prepare phosphogypsum-based mine tailings filling cementitious material, wherein percentages are mass percentages, based on the total mass of cementitious material, gel Total mass of cementitious material = mass of phosphogypsum + mass of red mud + mass of phosphorus slag + mass of clinker, activator dosage = mass of activator / total mass of cementitious material, ratio of cement to mineral = total mass of cementitious material / mass of iron tailings , Concentration = (mass of cementitious material+mass of iron tailings) / (mass of cementitious material+mass of iron tailings+water).

[0040] This experiment is iron tailings cementation experiment. Prepare the amount of tailings slurry and stirring capa...

Embodiment 3

[0046] Add quicklime to neutralize the phosphogypsum into neutral, dry and grind at 60°C to activate, the measured specific surface area of ​​phosphogypsum is 842.5m 2 / kg. According to Table 3 proportioning: phosphogypsum: red mud: phosphorus slag: clinker: activator to prepare phosphogypsum-based mine tailings filling cementitious material, wherein the percentages are mass percentages, based on the total mass of the cementitious material, the gelatinous Total mass of cementitious material = mass of phosphogypsum + mass of red mud + mass of phosphorous slag + mass of clinker, amount of activator = mass of activator / total mass of cementitious material, ratio of cement to mineral = total mass of cementitious material / mass of phosphorous tailings , concentration = (mass of cementitious material + mass of phosphorus tailings) / (mass of cementitious material + mass of phosphorous tailings + water).

[0047] This experiment is a phosphorous tailings cementation experiment. Prepare...

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
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention relates to a gelling material for mine tailing filling. The gelling material for mine tailing filling used for improving the early stage strength of a filler and having good water segregation performance is obtained through the steps of respectively milling phosphogypsum, red mud, phosphorus residues and clinker to 800m<2> / kg, 700m<2> / kg, 300m<2> / kg and above 300m<2> / kg respectively, uniformly mixing the above milled raw materials, and adding an exciting agent. The gelling material is used to carry out mine tailing filling, and the raw materials are from various industrial waste residues, so the gelling material has the advantages of low cost, simple technology, strong maneuverability, low filling cost, effective utilization of various industrial waste residues of the metallurgy industry, energy saving, emission reduction and environmental protection.

Description

technical field [0001] The patent of the present invention relates to a cementitious material for tailings filling. The phosphogypsum, red mud, phosphorus slag, and clinker are ground separately, mixed according to a certain ratio, and a certain composite activator is added to obtain a cementitious material for tailings filling that improves the early strength of the filling body and has good bleeding performance. Background technique [0002] Phosphogypsum is the industrial waste mainly dihydrate gypsum discharged from phosphoric acid produced by wet process of phosphate rock raw material. 1 ton of phosphoric acid produces 5-6t (dry basis) of phosphogypsum, and the actual amount is about 7t. Phosphogypsum is strongly acidic and its pH value is between Between 2 and 3, it contains a large amount of impurities different from natural gypsum, which will cause environmental pollution to water and soil during the storage process. The comprehensive utilization of phosphogypsum as...

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): C04B11/26E21F15/00
Inventor 黄绪泉
Owner CHINA THREE GORGES 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