Early strength filling cementing material for copper-nickel ore full tailings and rod-mill tailings mixed filler

A cementitious material and rod sanding technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of increasing the production cost of backfilling, complicated tailings classification process, and low utilization rate of tailings, etc. Achieve the effect of reducing tailings emissions, protecting the mine environment, and having good fluidity

Inactive Publication Date: 2014-05-21
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when implementing graded tailings filling, the utilization rate of tailings is low, and the tailings classification process is complicated, which not only increases the production cost of filling, but also makes it difficult to stack the separated fine mud, which poses a potential safety hazard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The composition of the filling cementitious material includes: 5% high-calcium lime, 17% desulfurization ash, 1% Glauber's salt, 77% slag fine powder in terms of mass percentage. Among them, the mass percentage content of CaO in high-calcium lime is 80%, and the particle size distribution of high-calcium lime is d 10 = 3.97 μm, d 50 =8.06μm, d 90 = 22.19 μm, d av =11.09μm, specific surface area 8377cm 2 / cm 3 ; SO in desulfurization ash 3 The mass percentage content is 38%, and the particle size distribution of desulfurization ash is d 10 = 13.5 μm, d 50 = 38.3 μm, d 90 = 72.7 μm, d av =42.2μm, specific surface area 2436 cm 2 / cm 3 ; The alkalinity coefficient of the slag micropowder is 0.9, the mass factor is 1.95, the activity coefficient is 1.2, and the particle size distribution of the slag micropowder is d 10 = 4.53 μm, d 50 = 10.67 μm, d 90 = 43.81 μm, d av = 18.13 μm.

Embodiment 2

[0038] The composition of the filling cementitious material includes: 5% high-calcium lime, 19% desulfurization ash, 2.5% Glauber's salt, 1.5% sodium sulfite, and 72% slag powder in terms of mass percentage. Among them, the mass percentage content of CaO in high-calcium lime is 83%, and the particle size distribution of high-calcium lime is d 10 =5.06μm, d 50 = 13.68 μm, d 90 = 42.21 μm, d av =24.55μm, specific surface area 5720cm 2 / cm 3 ; SO in desulfurization ash 3 The mass percentage content is 42%, and the particle size distribution of desulfurization ash is d 10 = 15.5 μm, d 50 = 40.1 μm, d 90 = 80.3 μm, d av =44.2μm, specific surface area 2327 cm 2 / cm 3 ; The slag fine powder is that the basicity coefficient is 0.63, the quality coefficient is 2.0, and the activity coefficient is 1.15; the particle size distribution of the slag fine powder is d 10 = 4.53 μm, d 50 = 10.67 μm, d 90 = 43.81 μm, d av = 18.13 μm.

Embodiment 3

[0040] The chemical composition of the copper-nickel ore tailings includes: 33%—34%SiO2 in terms of mass percentage 2 , 32%—34% MgO, 20%—21%Fe 2 o 3 , 2.5%—3.5%SO 3 , 2.5%—3.5%Al 2 o 3 , 2.0%—3.0%CaO, 0.5%—1.0%Cr 2 o 3 , 0%—0.5%Na 2 O, 0%—0.5%K 2 O, 0%—0.5%TiO 2 and 3 —3.0t / m 3 , the loose density is 1.2t / m 3 —1.3t / m 3 , the porosity is 54%-58%, and the particle size distribution is d 10 =0.0015mm—0.0017mm, d 50 =0.03mm—0.05mm, d 90 =0.1mm—0.2mm, d v =0.03mm—0.04mm, the unevenness coefficient is 20—23; the chemical composition of rod frosting includes: 70%—85%SiO2 in mass percentage 2 , 6%—10% Al 2 o 3 , 3%-6% MgO, 3%-6% CaO, 3%-8% Fe 2 o 3 , not more than 0.1% S; the particle size of rod frosting is -3mm, and the solid density is 2.6-2.7t / m 3 , loose density 1.5—1.6t / m 3 , the porosity is 40%-42%, the particle size distribution is d 10 =0.13mm—0.16mm, d 50 =0.8mm—1.0mm, d 60 =1.0mm—1.5mm, d 90 =2.9mm—3.3mm, d v =0.8 mm—1.2mm, and the unevenness...

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Abstract

The invention, for a copper-nickel ore full tailings and rod-mill tailings mixed filler, discloses an early strength filling cementing material. The early strength filling cementing material consists of the following components in percentage by mass: 5-6% of high-calcium lime, 17-19% of desulfurization residue, 1-3% of mirabilite, 72-77% of superfine slag powder, as well as no more than 1.5% of sodium sulfite. Furthermore, the invention discloses filler slurry prepared from the filling cementing material, mixed filler of copper-nickel sulfide ore deposit full tailings and rod-mill tailings as well as running water, wherein mass ratio of the copper-nickel sulfide ore full tailings to the rod-mill tailings is at (2: 8)-(3: 7), mass ratio of the filling cementing material to the mixed filler is at 1: 4, and the running water accounts for 22% in percentage by mass. The filler prepared by the method disclosed by the invention is high in strength, especially in early strength, and is low in cost.

Description

technical field [0001] The invention relates to a filling cementitious material for mining, in particular to a filling cementitious material for mining with a downward layered cementation filling method aimed at the mixed filling material of full tailings and rod abrasive sand in copper-nickel sulfide ore deposits. Background technique [0002] Tailings are wastes discharged after ore crushing, grinding and beneficiation, and are commonly used filling materials in filling mining. Due to the fine particle size and high mud content of the tailings, the strength of the filling body will be reduced in the filling mining method, especially the early strength. At present, most of the filling method mining process uses graded tailings for cemented filling. However, in the implementation of graded tailings filling, the utilization rate of tailings is low, and the tailings classification process is complicated, which not only increases the production cost of filling, but also makes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B18/12
CPCY02W30/91
Inventor 王永前杨志强高谦王永定李茂辉王有团李博刘瑞成
Owner JINCHUAN GROUP LIMITED
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