Wet-grinding tailing-based mine filling cementing material and preparation method and application thereof

A technology for mine filling and cementitious materials, which is applied in the direction of cement production, etc., can solve the problems of low pollution and low cost, and achieve the effects of low pollution, low cost and simple preparation methods

Inactive Publication Date: 2020-12-18
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to provide a cementitious material for wet grinding tailings-based mine filling and its preparation method and application. The cementitious material for wet-grinding tailings-based mine fil

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
  • Wet-grinding tailing-based mine filling cementing material and preparation method and application thereof
  • Wet-grinding tailing-based mine filling cementing material and preparation method and application thereof
  • Wet-grinding tailing-based mine filling cementing material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0037]The present invention also provides a preparation method of the wet grinding tailings-based mine filling cementitious material according to the above technical scheme, which includes the following steps:

[0038]a) After mixing the tailings, water quenching slag and water, perform wet grinding treatment to obtain slurry;

[0039]b) Add a powder sodium activator to the slurry obtained in step a), and perform dry mixing to obtain a wet grinding tailings-based mine filling cementitious material.

[0040]In the present invention, the tailings, water quenching slag and water are mixed first, and then subjected to wet grinding treatment to obtain slurry. In the present invention, the tailings, water quenching slag, and water are the same as those in the above technical solution, and will not be repeated here.

[0041]In the present invention, the wet grinding process preferably uses zirconium silicate grinding balls, and the ball-to-material ratio (mass ratio of zirconium silicate grinding ball...

Example Embodiment

[0064]Example 1

[0065](1) After mixing 25 parts by weight of tailings and 25 parts by weight of water quenching slag, add the same amount (50 parts by weight) of water for wet grinding treatment; the wet grinding treatment uses zirconium silicate grinding balls (particle size The ratio to mass is 3mm:2.5mm:0.7mm=2:5:3), the ball-to-material ratio (the mass ratio of the grinding ball to the solids in the waste slurry) is 2.5:1, the mill speed frequency is 45Hz, and the time is 50min; Obtain a slurry with a solid content of 50%;

[0066]The fineness D90 of the slurry is 8.8μm, and the specific surface area is 950m2 / kg.

[0067](2) The slurry obtained in step (1) was mixed with 3 parts by weight of a powder sodium activator, and mixed dry in a mixer at a speed of 280±10r / min for 2 minutes to obtain a wet mill tailings-based mine filling Cementitious material.

Example Embodiment

[0068]Example 2

[0069](1) After mixing 25 parts by weight of tailings and 25 parts by weight of water quenching slag, add 75 parts by weight of water for wet grinding treatment; the wet grinding treatment uses zirconium silicate grinding balls (the ratio of particle size to mass is 3mm:2.5mm:0.7mm=2:5:3), the ball-to-material ratio (the mass ratio of the grinding ball to the solids in the waste slurry) is 2.5:1, the mill speed frequency is 45Hz, and the time is 50min; the solid content is 40 % Of slurry;

[0070]The fineness D90 of the slurry is 9.4μm, and the specific surface area is 916m2 / kg.

[0071](2) In the slurry obtained in step (1), 3 parts by weight of the powder sodium activator were mixed in the mixing machine at a speed of 280±10r / min for 2min to obtain wet grinding tailings-based mine filling Cementitious material.

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
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to a wet-grinding tailing-based mine filling cementing material and a preparation method and application thereof. The wet-grinding tailing-based mine filling cementing material is prepared from the following raw materials in parts by weight: 20-30 parts of tailings, 20-30 parts of water-quenched slag, 40-90 parts of water, and 1.6-4.8 parts of a powder sodium excitant. Compared with the prior art, the wet-grinding tailing-based mine filling cementing material provided by the invention adopts specific content components, can realize better interaction, can replace cement as the mine filling cementing material, is low in cost and small in pollution, remarkably improves the utilization rate of mine tailings, solves the problem of accumulation of a large amount of mine tailings, and is suitable for the concept of green sustainable development. Filler slurry further obtained by adopting the wet-grinding tailing-based mine filling cementing material provided by the invention is good in fluidity and excellent in mechanical property.

Description

technical field [0001] The invention relates to the technical field of mine filling, and more specifically relates to a cementitious material for mine filling based on wet grinding tailings and its preparation method and application. Background technique [0002] Mineral resources are one of the essential energy sources in the process of economic development. my country's mineral resources are abundant and widely distributed, and most mines are mined by the open-field method; but in the actual mining process, the open-field method will lead to the formation of a large number of irregular open-field areas in the mine, which seriously affects the mine environment; The mining and production of mines also brings certain hidden dangers. With the continuous improvement of our country's policies related to mining, the filling and filling mining method has gradually been widely used. The filling mining method refers to filling the blank area formed by the original mining to control...

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): C04B12/00C04B7/24
CPCC04B7/24C04B12/005Y02P40/10
Inventor 高英力曹韩硕万红伟段开瑞周文娟裴甘鹏龙国鑫
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap