A kind of curing agent for iron tailings filling and preparation method thereof

A curing agent and iron tailings technology, applied in the field of mine safety, can solve the problems of expansion source foaming, complicated operation process, poor filling effect, etc., and achieve controllable foaming process, small volume shrinkage, and simple operation Effect

Active Publication Date: 2015-12-02
罗强
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcomings are: the filling material of hydraulic filling lacks cohesive properties, cannot form a stable and self-supporting filling body, and the stope needs a lot of dehydration
The disadvantage is that the filling material has a large water content and shrinks after curing, which makes it difficult to connect the solidified body to the top and the filling effect is poor.
Although the above method solves the problem of the difficulty of filling the solidified body to the top, the entire solidification system is composed of three independent materials, and the three materials are used in different stages of filling, and the expansion agent is added at the end because the filling mud system does not have foam stability. function, causing the hydrogen bubbles of the expansion source to escape and fail to achieve the ideal expansion effect after escaping, and the strength of the filling body is reduced. In addition, the entire operation process is complicated and the process is not easy to accurately control

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 1

[0026] Example 1: A curing agent for backfilling iron tailings provided by the present invention is composed of fly ash, slag powder, steel slag powder, alkaline activator, sulfate activator, foam stabilizer, and aluminum powder as core materials Is composed of microcapsules, in which fly ash accounts for 25 parts, slag accounts for 28 parts, steel slag accounts for 25 parts, alkaline activator accounts for 10 parts, sulfate activator accounts for 10 parts, foam stabilizer accounts for 0.1 part, and aluminum powder is the core The microcapsules of the material account for 1.9 parts;

[0027] The fly ash is Class I fly ash, and the specific surface area of ​​fly ash is 460m 2 / kg;

[0028] The slag powder is made of water-quenched granulated blast furnace slag, and the specific surface area of ​​the slag powder is 400m 2 / kg;

[0029] The said steel slag powder is made by grinding converter air-cooled slag, the basicity coefficient of the steel slag is 2.0, and the specific surface a...

Embodiment 2

[0038] Example 2: The present invention provides a curing agent for backfilling iron tailings, which is composed of fly ash, slag powder, steel slag powder, alkaline activator, sulfate activator, foam stabilizer, and aluminum powder as core materials It is composed of microcapsules, in which fly ash accounts for 70 parts, slag accounts for 10 parts, steel slag accounts for 5 parts, alkaline activator accounts for 10 parts, sulfate activator accounts for 3 parts, foam stabilizer accounts for 0.2 parts, and aluminum powder is the core The microcapsules of the material account for 1.8 parts;

[0039] The fly ash is ground level III fly ash, and the specific surface area of ​​the fly ash is 600m 2 / kg;

[0040] The slag powder is made of water-quenched granulated blast furnace slag, and the specific surface area of ​​the slag powder is 500m 2 / kg;

[0041] The steel slag powder is made by grinding converter air-cooled slag, the basicity coefficient of the steel slag is 2.5, and the spec...

Embodiment 3

[0050] Example 3: A curing agent for backfilling iron tailings provided by the present invention is composed of microcapsules with core materials of slag powder, steel slag powder, alkaline activator, sulfate activator, foam stabilizer, and aluminum powder. , Including 40 parts of slag, 30 parts of steel slag, 15 parts of alkaline activator, 10 parts of sulfate activator, 0.2 part of foam stabilizer, and 4.8 parts of microcapsules with aluminum powder as core material;

[0051] The slag powder is made of water-quenched granulated blast furnace slag, and the specific surface area of ​​the slag powder is 560m 2 / kg;

[0052] The said steel slag powder is made by grinding converter air-cooled slag, the basicity coefficient of steel slag is 3.0, and the specific surface area of ​​steel slag powder is 500m 2 / kg;

[0053] The alkaline activator is a combination of 42.5 standard Portland cement and 52.5 standard aluminate cement at a mass ratio of 5:1, and the residual mass of the alkaline...

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
compressive strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a curing agent for filling iron tailings and a preparation method thereof and belongs to the technical field of mine safety. The curing agent comprise the following components in parts by mass: 0-70 parts of fly ash, 10-80 parts of superfine mineral slag powder, 0-70 parts of superfine steel slag powder, 0-20 parts of an alkaline activator, 0-20 parts of an sulfate activator, 0.1-1 part of a foam stabilizer and 2-5 parts of a microcapsule in which aluminum powder is used as a core material. The preparation method of the curing agent comprises the steps of firstly weighting fly ash, superfine mineral slag powder, superfine steel slag powder, alkaline activator, sulfate activator and foam stabilizer according to the blending ratio of the components of the curing agent, adding all the components in a stirrer, quickly stirring for 5-15 minutes, adding microcapsule in which aluminum powder is used as a core material and slowly stirring for 2-5 minutes to obtain the curing agent for filling iron tailings. The curing agent for filling iron tailings provided by the invention has strong curing capability and is simple and controllable in use and operation.

Description

Technical field [0001] The invention belongs to the technical field of mine safety, and specifically relates to a curing agent for iron tailings filling and a preparation method thereof. Background technique [0002] my country has abundant mineral resources, and reserves rank among the top in the world. There are a large number of buildings, water bodies, railways, and high-grade highways above the mineral deposits. Various mining areas have the problem of "three unders" (under buildings, railways, and water bodies) compressing mineral resources to varying degrees. For a long time, the "three under" mining methods in my country's mines have mainly adopted several methods such as village (town) relocation, strip mining, room and pillar mining and backfill mining. Among them, filling mining can effectively solve the problem that the existing buildings, water bodies, railways, and high-level highways above the mine are not affected by the mining process. According to the filling ...

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): C04B28/08C04B22/04
Inventor 樊传刚高元宝
Owner 罗强
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