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

A filling slurry with improved fluidity and preparation method thereof

A technology of filling slurry and fluidity, which is applied in the field of mine filling slurry, can solve the problems of poor consolidation ability of cement to tailings, reduced fluidity of filling slurry, and high bleeding rate of filling slurry, so as to improve the spatial structure Effects of stability, improved filling capacity, and elimination of the risk of clogging

Active Publication Date: 2022-02-18
GUYAN TECH DEV CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the mines using the filling mining method at home and abroad use Portland cement as the cementing material, but the cost price of Portland cement continues to rise, and the proportion of the cost of cementing materials is increasing. At the same time , in fact, using Portland cement and tailings as filling slurry, there are problems such as poor consolidation ability of cement to tailings, low filling strength, and high heat of hydration. When the coagulation energy state of cement and tailings is poor , it will cause a high bleeding rate of the filling slurry, and in the transportation process, there will be problems such as poor fluidity during transportation, blockage of the filling system, and low transportation efficiency
[0003] Later studies used the addition of flocculants to carry out flocculation and sedimentation treatment of tailings, which in turn improved the consolidation ability of tailings, etc. However, because flocculants also increase the liquid seepage resistance, there will also be a decrease in the fluidity of the filling slurry. The problem

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 filling slurry with improved fluidity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing filling slurry with improved fluidity:

[0026] 1) Pretreatment: Dry and grind the fine-grained tailings and coal slime respectively, dry the fine-grained tailings to dry the water, dry the coal slime to a moisture content of 15-20%, and then fine-grained tailings powder Grind until the particle size is ≤35μm, and the specific surface area is 600~800 m 2 / kg, the coal slime is ground into a powder with a particle size ≤ 1cm;

[0027] 2) Mix 25% fine-grained tailings and 9% coal slime powder, add 3% anionic surfactant A-olefin sulfonate and 2% cationic surfactant alkyl quaternary ammonium salt, mix and place in stirring reaction In the container, and heated to 90~100℃, fully stirred evenly, the stirring speed is 150~170 r / min, stirring for 1h;

[0028] 3) Then add 1% phosphoric acid-modified polycarboxylic acid, 12% sodium sulfate, 25% alkaline activator (the ratio of sodium hydroxide to sodium carbonate is 3:7), 2% polypropylene fiber, 8% benton...

Embodiment 2

[0032] A method for preparing filling slurry with improved fluidity:

[0033] 1) Pretreatment: Dry and grind the fine-grained tailings and coal slime respectively, dry the fine-grained tailings to dry the water, dry the coal slime to a moisture content of 15-20%, and then fine-grained tailings powder Grind until the particle size is ≤35μm, and the specific surface area is 600~800 m 2 / kg, the coal slime is ground into a powder with a particle size ≤ 1cm;

[0034] 2) Mix 30% fine-grained tailings and 8% coal slime powder, add 2% anionic surfactant (polymer polyphosphate and siloxane phosphate 1:1) and 2% cationic surfactant ( Amino silicone oil and aminosilane 1:1), mix and place in a stirring reactor, and heat to 90~100°C, stir well and evenly, at a stirring speed of 150~170 r / min, stirring for 1h;

[0035] 3) Then add 1.5% phosphoric acid-modified polycarboxylic acid, 10% sodium sulfate, 20.5% alkaline activator (calcium hydroxide and calcium silicate 4:6), 2% polypropylene...

Embodiment 3

[0038] A method for preparing filling slurry with improved fluidity:

[0039] 1) Pretreatment: Dry and grind the fine-grained tailings and coal slime respectively, dry the fine-grained tailings to dry the water, dry the coal slime to a moisture content of 15-20%, and then fine-grained tailings powder Grind until the particle size is ≤35μm, and the specific surface area is 700~900 m 2 / kg, the coal slime is ground into a powder with a particle size ≤ 1cm;

[0040] 2) Mix 30% fine-grained tailings and 8% coal slime powder, add 2% anionic surfactant polymer polyphosphate and 3% cationic surfactant amino silicone oil, mix and place in a stirring reactor, and Heat to 100~110°C, fully stir evenly, the stirring speed is 170~200 r / min, and stir for 1.5h;

[0041] 3) Then add 1% phosphoric acid-modified polycarboxylic acid, 10% potassium sulfate, 21% alkaline activator (potassium hydroxide and potassium bicarbonate 4:6), 2% polypropylene fiber, 5% bentonite, 8% Slag, 7% desulfurized...

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 diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of mine filling slurry, and in particular relates to a filling slurry with improved fluidity and a preparation method thereof. The components of the filling slurry include fine-grained tailings, coal slime, modified carboxylic acid-based water reducer, alkali metal sulfate, alkaline activator, polypropylene fiber, bentonite, slag, gypsum, anionic surface active agent, cationic surfactant and water; by adding modified polycarboxylate superplasticizer, the sensitivity of the filling slurry can be reduced, the rheological properties of the slurry can be improved, and the fluidity of the filling body can be adjusted to promote the fluidity of the slurry and stability, as well as the use of anionic and cationic surfactants, etc., through surface charge and steric hindrance, to achieve drag reduction and high-concentration delivery, reduce bleeding rate, eliminate the risk of pipe plugging in the filling system, improve filling capacity, and achieve Stable and economical delivery of filling slurries.

Description

technical field [0001] The invention belongs to the technical field of mine filling slurry, and in particular relates to a filling slurry with improved fluidity and a preparation method thereof. Background technique [0002] At present, most of the mines using the filling mining method at home and abroad use Portland cement as the cementing material, but the cost price of Portland cement continues to rise, and the proportion of the cost of cementing materials is increasing. At the same time , in fact, using Portland cement and tailings as filling slurry, there are problems such as poor consolidation ability of cement to tailings, low filling strength, and high heat of hydration. When the coagulation energy state of cement and tailings is poor , it will cause a high bleeding rate of the filling slurry, and in the transportation process, there will be problems such as poor fluidity during transportation, blockage of the filling system, and low transportation efficiency. [00...

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): C04B28/14C04B18/12
CPCC04B28/14C04B28/142C04B28/144C04B2111/00724Y02W30/91
Inventor 冯波宇陈锡麟李鹏潘敏尧陈忠平刘源黎伟明林嘉昇梁浩坚张善硕邓汉楚彭名
Owner GUYAN TECH DEV CO LTD
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