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Gelatinizing agent suitable for unclassified tailing filling

A technology of tailings filling and gelling agent, which is applied in the field of gelling agent and full tailings cementation and filling, can solve the problems of difficult cementation and low cementation strength, and achieves the advantages of convenient on-site construction, simple production process and improved filling utilization rate. Effect

Active Publication Date: 2014-09-10
SINOSTEEL MAANSHAN INST OF MINING RES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The task of the present invention is to provide a low-cost, simple construction gelling agent suitable for full tailings filling in view of the above-mentioned problems in the prior art. Mine and high-silt tailings are difficult to cement and the cementation strength is not high. All kinds of tailings can be used as filling aggregate for mine room filling and open-pit backfilling and reclamation

Method used

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  • Gelatinizing agent suitable for unclassified tailing filling
  • Gelatinizing agent suitable for unclassified tailing filling
  • Gelatinizing agent suitable for unclassified tailing filling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 39.26% Belite-sulfoaluminate cement (sulfoaluminate cement and ordinary Portland cement are compounded at a ratio of 1:3), 4% anhydrite, 2% quicklime, 45% slag micropowder, 5 % fly ash, 4% sodium silicate, 0.4% sodium fluorosilicate, 0.14% lithium hydroxide, and 0.2% polycarboxylate water reducer are mixed and milled to obtain a gelling agent. The gelling agent was tested with the whole tailings of fine ore and the graded tailings of -200 mesh copper ore respectively. The compressive strength is shown in Table 1 and Table 2.

[0036] Table 1 Whole tailings of fine ore (40% mud content), compressive strength of gel (MPa)

[0037]

[0038] Table 2 -200 mesh copper ore grading tailings, gel compressive strength (MPa)

[0039]

Embodiment 2

[0041] 29.26% Belite-sulfoaluminate cement (sulfoaluminate cement and ordinary Portland cement are compounded at a ratio of 1:3), 4% anhydrite, 2% quicklime, 55% slag powder, 5 % fly ash, 4% sodium silicate, 0.4% sodium fluorosilicate, 0.14% lithium hydroxide, and 0.2% polycarboxylate water reducer are mixed and milled to obtain a gelling agent. The gelling agent was tested with the whole tailings of fine ore and graded tailings of -200 mesh copper ore respectively. The compressive strength is shown in Table 3 and Table 4.

[0042] Table 3 Whole tailings of fine ore (40% mud content), compressive strength of gel (MPa)

[0043]

[0044] Table 4 -200 mesh copper ore graded tailings, gel compressive strength (MPa)

[0045]

Embodiment 3

[0047] 25.26% Belite-sulfoaluminate cement (sulfoaluminate cement and ordinary Portland cement are compounded at a ratio of 1:3), 4% anhydrite, 2% quicklime, 60% slag micropowder, 5 % fly ash, 4% sodium silicate, 0.4% sodium fluorosilicate, 0.14% lithium hydroxide, and 0.2% polycarboxylate water reducer are mixed and milled to obtain a gelling agent. The gelling agent was tested with the whole tailings of fine ore and graded tailings of -200 mesh copper ore respectively. The compressive strength is shown in Table 5 and Table 6.

[0048] Table 5 Full tailings of fine ore (40% mud content), compressive strength of gel (MPa)

[0049]

[0050] Table 6 -200 mesh copper ore grading tailings, gel compressive strength (MPa)

[0051]

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Abstract

The invention discloses a gelatinizing agent suitable for unclassified tailing filling. The gelatinizing agent is prepared by grinding and mixing the following components by mass percent: 15-40% of belite-sulphate aluminium cement, 2-10% of gypsum, 0-8% of limestone, 40-70% of superfine slag powder, 0-10% of coal ash, 1-8% of an activating agent, 0.1-0.5% of an activation promoter, 0.1-0.5% of a coagulation accelerator and 0.1-0.5% of a water reducing agent. The gelatinizing agent suitable for the unclassified tailing filling disclosed by the invention solves the problems of difficult solidification and poor strength after solidification of unclassified tailings and classified tailings being -200meshes; through the gelatinizing agent, the filling material can meet strength demand required by mine filling mining, the fluidity of slurry is improved, injection performance of the filling material is improved, water retention capacity is improved, and slurry bleeding is relieved.

Description

technical field [0001] The invention relates to a gelling agent, in particular to a gelling agent for mine tailings filling, which is suitable for mine filling, backfilling and reclamation of open pits and subsidence areas, and solidification of bottom sludge of tailings ponds, reservoirs, ponds and weirs, etc. It is especially suitable for full tailings cemented filling. The invention belongs to the technical field of mine filling materials. Background technique [0002] Goaf filling is an important way to consume a large amount of tailings, reduce tailings discharge, and store up land. This technology prepares concentrated tailings and cementitious materials into filling mortar with a certain concentration and fills it into the goaf, forming a certain Strong filling. [0003] Portland cement is a typical building material, which has strict technical requirements on the water-cement ratio. The water-cement ratio affects the coagulation structure of the cement slurry and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/26
CPCY02P40/10
Inventor 徐修平海冰于先坤杨晓军徐静华绍广
Owner SINOSTEEL MAANSHAN INST OF MINING RES CO LTD
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