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Gel material for ultra-fine tailing filling and dry heaping

A tailings filling and cementing material technology, applied in cement production and other directions, can solve the problems of difficult cementation and low cementation strength of ultra-fine full tailings, reduce construction investment and maintenance costs, simple production process, and good early strength. The effect of resistance and cementitious properties

Inactive Publication Date: 2016-07-20
SINOSTEEL MAANSHAN INST OF MINING RES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the above-mentioned problems in the prior art, and provide a low-cost, simple construction ultra-fine tailings filling and cementitious material for dry stacking, which is used to solve the problem of excessive particle size. 0.037mm square sieve hole ≥ 95% and 0.02mm square sieve hole ≮ 70% classified ultra-fine tailings, ultra-fine full tailings are difficult to cement and the cementation strength is not high, including grading fine-grained All kinds of tailings, including tailings and ultra-fine tailings, are used as filling aggregates for cemented filling mining and dry storage of full tailings in mines

Method used

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  • Gel material for ultra-fine tailing filling and dry heaping
  • Gel material for ultra-fine tailing filling and dry heaping
  • Gel material for ultra-fine tailing filling and dry heaping

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Formula 1: 82.8% slag powder, 8% activator (quicklime, sodium aluminate and sodium orthosilicate compounded at a mass ratio of 86:6:8), 0.6% accelerator, 0.4% coagulant (sulfur Sodium cyanate and anhydrous calcium chloride are compounded at a mass ratio of 30:70), reinforcing agent 8% (raw gypsum, hemihydrate gypsum and plaster of paris are compounded at a mass ratio of 50:30:20), pumping agent 0.2 %.

[0038] Formula 2: 82.8% slag powder, 8% activator (quicklime, sodium aluminate and sodium orthosilicate compounded at a mass ratio of 90:4:6), 0.6% accelerator, 0.4% coagulant (sulfur Sodium cyanate and anhydrous calcium chloride are compounded at a mass ratio of 30:70), reinforcing agent 8% (raw gypsum, hemihydrate gypsum and plaster of paris are compounded at a mass ratio of 40:30:30), pumping agent 0.2 %.

[0039] The tailings are graded fine tailings of copper ore, the mass proportion of <37 μm is 96.31%, the mass proportion of <20 μm is 79.72%, and the mass propor...

Embodiment 2

[0045] Formula 3: 79.6% slag powder, 10% activator (quicklime, sodium aluminate and sodium orthosilicate compounded at a mass ratio of 85:8:7), 0.7% accelerator, 0.5% coagulant (sulfur Sodium cyanate and anhydrous calcium chloride are compounded at a mass ratio of 40:60), reinforcing agent 9% (raw gypsum, hemihydrate gypsum and plaster of paris are compounded at a mass ratio of 50:30:20), pumping agent 0.2 %;

[0046] Formula 4: 79.6% slag powder, 10% activator (quicklime, sodium aluminate and sodium orthosilicate compounded at a mass ratio of 87:8:5), 0.7% accelerator, 0.5% coagulant (sulfur Sodium cyanate and anhydrous calcium chloride are compounded at a mass ratio of 30:70), reinforcing agent 9% (raw gypsum, hemihydrate gypsum and plaster of paris are compounded at a mass ratio of 40:30:30), pumping agent 0.2 %.

[0047] The tailings are graded fine tailings of lead-zinc mines, the mass proportion of <37 μm is 95.07%, the mass proportion of <20 μm is 72.84%, and the mass...

Embodiment 3

[0053] Formula 5: 78.7% slag powder, 9% activator (quicklime, sodium aluminate and sodium orthosilicate compounded at a mass ratio of 85:8:7), 0.6% accelerator, 0.5% coagulant (sulfur Sodium cyanate and anhydrous calcium chloride are compounded at a mass ratio of 40:60), reinforcing agent 11% (raw gypsum, hemihydrate gypsum and plaster of paris are compounded at a mass ratio of 50:30:20), pumping agent 0.2 %;

[0054] Formula 6: 78.7% slag powder, 9% activator (quicklime, sodium aluminate and sodium orthosilicate compounded at a mass ratio of 87:8:5), 0.6% accelerator, 0.4% coagulant (sulfur Sodium cyanate and anhydrous calcium chloride are compounded at a mass ratio of 30:70), reinforcing agent 11% (gypsum, hemihydrate and plaster of paris are compounded at a mass ratio of 35:35:30), pumping agent 0.2 %.

[0055] The tailings are all mirror iron ore tailings, with a mud content of 40%. The mass proportion of tailings with a particle size of <37 μm is 58.97%, that of <20 μm ...

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Abstract

The invention discloses a gel material for ultra-fine tailing filling and dry heaping.The gel material is prepared from, by mass, 70-90% of blast furnace water granulated slag fine powder, 3-15% of an activating agent, 0.5-0.8% of an activation promoter, 0.3-0.6% of coagulant, 0.1-0.3% of a pumping aid and 5-15% of a reinforcing agent through the steps of matching, mixing and grinding.The activating agent is a mixed compound composed of quick lime, sodium aluminate and sodium orthosilicate.The activation promoter is sodium fluoride.The coagulant is a mixed compound of sodium thiocyanate and anhydrous calcium chloride.The pumping aid is non-ionic surfactant.The reinforcing agent is a mixed compound composed of gypsum, semi-hydrated gypsum, calcined gypsum and aluminum sulfate.The gel material solves the problem that ultra-fine and fine-particle tailing and tailing slurry are difficult to cure and low in strength after curing, and the gel material is low in cost and easy to construct, and has the double characteristics of high early strength and high later strength.

Description

technical field [0001] The invention belongs to the technical field of tailings cemented filling materials, and specifically relates to a cemented material for tailings filling or dry stacking, especially suitable for various metal tailings after grading treatment, the particle size of which passes through a 0.037mm square sieve hole ≥ 95 %, through the 0.02mm square sieve ≮ 70% (by mass) fine tailings, superfine tailings as aggregate cementitious material. Background technique [0002] With the continuous development of mineral resources, the proportion of mining in underground mines is increasing. People are paying more and more attention to issues such as improving the resource recovery rate of underground mining, protecting the surface ecology of mines, and mine safety. The method can no longer meet the requirements of green, safe and sustainable mining of resources. Therefore, the filling and filling mining method has been greatly developed and widely used. [0003] Th...

Claims

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Application Information

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IPC IPC(8): C04B7/21C04B7/153
CPCC04B7/1535C04B7/21Y02P40/10
Inventor 王运敏杨晓军徐修平徐静刘龙华超朱君星曾申进尹裕
Owner SINOSTEEL MAANSHAN INST OF MINING RES
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