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Gel material for filling worked out section by vanadium-titanium-containing slags

A technology of cementitious materials and vanadium-titanium slag, which is applied in the field of cementitious materials, can solve the problems of restricting the application and development of cemented filling technology and the high cost of filling materials, and achieve prevention and environmental protection, resource utilization, and low disposal cost effect

Active Publication Date: 2014-04-23
JINCHUAN GROUP LIMITED +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high cost of filling materials makes many mines discouraged from cemented filling technology, which seriously restricts the application and development of cemented filling technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The chemical composition of the cementitious material is calculated by mass percentage: 8% cement clinker, 15% desulfurized gypsum, and 77% vanadium-titanium slag. The particle size distribution of desulfurized gypsum is d 10 = 13.5 μm, d 50 = 38.3 μm, d 90 = 72.7 μm, d av =42.2μm, specific surface area 2436.0cm 2 / cm 3 , SO in desulfurized gypsum 3 The mass percentage is 38%. The particle size distribution of vanadium-titanium slag is d 10 = 4.5 μm, d 50 = 10.7 μm, d 90 = 43.8 μm, d av = 18.2 μm, alkaline slag with an alkalinity coefficient of 1.1, a quality coefficient of 1.6, and an activity coefficient of 0.5.

[0044] The composition of the full tailings filling material includes: 73% - 75% SiO2 in terms of mass percentage 2 , 5%-6%CaO, 6%-7%Fe 2 o 3 , 5%—6%Al 2 o 3 , 3%-4%MgO, less than 3% loss on ignition; the density of the full tailings filling is 2.52g / cm 3 , the particle size is less than 0.9mm, the content of fine tailings with a particle siz...

Embodiment 2

[0047] The chemical composition of the cementitious material is calculated by mass percentage: 4% cement clinker, 4% quicklime, 14% desulfurized gypsum, 76% vanadium-titanium slag, and 2% Glauber's salt. The mass percentage of CaO in quicklime is 78%, and the particle size distribution of quicklime 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 . The particle size distribution of desulfurized gypsum is d 10 = 14.5 μm, d 50 = 39.3 μm, d 90 = 75.8 μm, d av =43.5μm, specific surface area 2396.7cm 2 / cm 3 , SO in desulfurized gypsum 3 The mass percentage is 39%. The particle size distribution of vanadium-titanium slag is d 10 = 4.5 μm, d 50 = 10.7 μm, d 90 = 43.8 μm, d av =18.2μm, the alkalinity coefficient is 1.06, the quality coefficient is 1.8, and the activity coefficient is 0.5.

[0048] The composition of the full tailings filling material includes: 73% - 75% SiO2 in terms of mass percentage 2 , 5%-6%C...

Embodiment 3

[0051] The chemical composition of the cementitious material is calculated by mass percentage: 5% cement clinker, 6% quicklime, 14% desulfurized gypsum, 75% vanadium-titanium slag. The mass percentage of CaO in quicklime is 82%, and the particle size distribution of quicklime is d 10 = 4.91 μm, d 50 = 12.73 μm, d 90 = 39.85 μm, d av =22.23μm, specific surface area 6013cm 2 / cm 3 . The particle size distribution of desulfurized gypsum is d 10 = 15.2 μm, d 50 = 39.6 μm, d 90 = 70.1 μm, d av =41.9μm, specific surface area 2450.5 cm 2 / cm 3 , SO in the desulfurized gypsum 3 The mass percentage is 38%.

[0052] 6. cementitious material according to claim 1, is characterized in that, the particle size distribution of vanadium-titanium slag is d 10 = 4.5 μm, d 50 = 10.7 μm, d 90 = 43.8 μm, d av =18.2μm, the alkalinity coefficient is 1.04, the quality coefficient is 1.6, and the activity coefficient is 0.5.

[0053] The composition of the full tailings filling materia...

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Abstract

The invention discloses a gel material for filling a worked out section by vanadium-titanium-containing slags. The gel material comprises the following components in percentage by weight: 8-11% of an alkaline excitant, 14-16% of desulfurized gypsum and 71-77% of vanadium-titanium slags. The gel material further can comprise 1-2% of mirabilite as an early strength agent. The invention discloses filling slurry prepared from the gel material, full mill-tailing filler and tap water at the same, wherein the weight ratio of the gel material to the full mill-tailing filler is (1:15)-(1:4), and the percentage by weight of the tap water is 22-32%. The gel material disclosed by the invention realizes resource utilization of vanadium-titanium-containing slags and reduction of stacking of solid residues on the surface, and the filling cost of the worked out section of a mine is greatly reduced. Meanwhile, the filling body prepared has high strength.

Description

technical field [0001] The invention relates to a cementitious material, in particular to a tailings cementitious material containing vanadium-titanium slag used for empty area treatment. Background technique [0002] Vanadium-titanium slag is an inorganic material mainly composed of titanium pyroxene, perovskite and other minerals formed by the molten slag produced during the smelting of vanadium-titanium magnetite by natural cooling or water cooling in the air. Due to the high content of titanium dioxide in the slag, the quality and activity of the slag are greatly reduced, which brings great difficulties to the resource utilization of the slag, resulting in a large amount of slag stacking, which not only takes up a lot of land and increases maintenance costs, but also pollutes the environment. [0003] In the field of mining, due to the disorderly mining of early resource development and open-field mining, there are a large number of goafs and residual pillars underground...

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 姚维信杨志强高谦王虎李茂辉刘世和陈永强崔继强
Owner JINCHUAN GROUP LIMITED
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