Preparation of Mine Filling Material from Steel Slag Mud

Ren, Chao; Li, Keqing; Wen, Ning; Zhang, Siqi

doi:10.18280/acsm.430404

Cited by 6 publications

(4 citation statements)

References 17 publications

(18 reference statements)

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“…Liao et al [15] have conducted a whole system study on the cementing property, alkali excitation property, and hydration mechanism of the yellow phosphorus slag, and developed a kind of filling cementing material with wider prospects and cheaper. Ren et al [16] prepared steel slag and other industrial solid wastes into mine filling materials, explored the mechanical activation law of steel slag mud, and provided a theoretical basis for the resource utilization of steel slag mud. Zhang et al [17] used blast furnace slag as raw material to form a binder in slag material by adding cement clinker, gypsum, and activator with different contents and discussed the cementing mechanism of slag cementing material in mine backfill according to the strength and capacity law of backfill body.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Ratio and Hydration Mechanism of Titanium-Extracted Residual Slag-Based Filling Cementitious Materials

Li,

Hao

et al. 2024

Minerals

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Using metallurgical solid waste Titanium-extracted Residual Slag (TRS) as mine-filling cementitious material is crucial to reduce the filling cost and promote the utilization of solid waste resources. In this paper, taking the strength of the backfill at different curing ages as the response target, the Design-expert mixing design was used to optimize the proportioning experiment of titanium-extracted residual slag, titanium gypsum, silicate cement, and total tailings, to analyze the interactions and influences of the materials on the strength of the backfill, and to analyze the hydration mechanism of the titanium-extracted residual slag-based filling cementitious materials under the optimal proportioning. The results show that: (1) the order of the sensitivity of each component to the strength of backfill is: composite activator > cement > titanium gypsum > titanium-extracted residual slag, and there are different degrees of interaction between them; (2) the optimal ratio of titanium-extracted residual slag-based filling cementitious materials is TRS:titanium gypsum:cement:composite activator = 55:25:17:3; (3) early strength formation of backfill is mainly related to its hydration products ettringite and C-S-H, the rapid nucleation and cross-growth of ettringite in the early stage forms an effective physical filling effect, which is the main reason for the formation of high early strength, and the later strength of backfill benefited from the continuous accumulation of C-S-H encapsulation and bonding, which further densified its internal structure; (4) the use of titanium-extracted residual slag-based filling cementitious materials contributes to safe, green, and economic mining.

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Section: Introductionmentioning

confidence: 99%

Optimization of Ratio and Hydration Mechanism of Titanium-Extracted Residual Slag-Based Filling Cementitious Materials

Li,

Hao

et al. 2024

Minerals

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“…Dai et al [13] tested the optimum mix ratio of unclassified tailings on the basis of Box-Behnken, and the best mix ratio of cement slurry filling was obtained. Ren et al [14] studied the mechanical activation law of steel slag sludge by XRD and FT-IR and developed a new solid waste filling material. Shi et al [15] studied the influence of different mixing ratios of fly ash and carbide slag on the physical and mechanical properties of high water filling materials.…”

Section: Introductionmentioning

confidence: 99%

Fluidity Influencing Factor Analysis and Ratio Optimization of New Filling Slurry Based on the Response Surface Method

Chang¹,

Hua²,

Liu³

et al. 2022

Journal of Renewable Materials

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The filling mining method is important in realizing the green mining of mineral resources. Aiming at the problems of land resource occupation, environmental pollution, and rational utilization of coal-based solid wastes such as coal gangue, fly ash, and desulfurization gypsum, a new paste filling material was developed with coal gangue, fly ash, and desulfurization gypsum as raw materials. The microstructure of the raw materials was analyzed by XRD and SEM. Combined with the Box-Behnken experimental design, the effect of each component on the fluidity of the filling slurry was analyzed through the response surface analysis. The significance of each component on its bleeding and fluidity was determined, and the optimal ratio of the filling slurry was obtained. Experimental results show that the microcosmic morphology of coal gangue, desulfurization gypsum, and gasification slag presents an irregular block and rough particle surface; the microcosmic morphology of fly ash and bottom slag presents first out spherical or quasi spherical particles. Moreover, obvious sintering traces exist on the surface of the bottom slag. The main crystal mineral of coal gangue and fly ash is SiO 2 , the desulfurization gypsum is composed of Ca(SO 4 ) (H 2 O) and Ca(CO 3 ) crystal minerals, the gasification slag is composed of carbon and nitrogen compounds, and the main crystal mineral components in the bottom slag sample are SiO 2 and Al x Si y O z compounds. The order of significance of each key factor on slurry fluidity is as follows: C (desulfurization gypsum) > D (gasification slag and bottom slag 1:1) > A (coal gangue) > B (fly ash). The order of the significance of each key factor on slurry bleeding is as follows: B (fly ash) > C (desulfurization gypsum) > D (gasification slag and bottom slag 1:1) > A (coal gangue). Considering the material preparation, field application, and other conditions, the mass percentage of each factor content of the new paste filling material is as follows: 49.5% coal gangue, 8.3% fly ash, 4.1% desulfurization gypsum, 6.2% gasification slag, and 6.2% bottom slag.

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“…Vanadium tailings (VTs) are the tailings produced as the metal vanadium is extracted from stone coal through crushing, calcination, and leaching. VTs mainly encompass SiO 2 and a small amount of Al 2 O 3 [1][2][3]. e production of every 1 t of V 2 O 5 from stone coal would generate 150 t of VTs.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Vanadium Tailings-Reservoir Sediment-Phosphogypsum-Based Foamed Concrete

Cui

Wang

et al. 2021

Mathematical Problems in Engineering

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Foamed concrete (FC) was prepared from raw materials of vanadium tailings (VTs), reservoir sediment (RS), and phosphogypsum (PG). The physicochemical properties of the raw materials were studied by using X-ray diffraction (XRD), X-ray fluorescence (XRF) analysis, and inductively coupled plasma emission spectrometer (ICP-OES). The preparation and properties of FC were investigated by particle size analysis and strength test. The hydration products and microstructure of FC were analyzed by XRD and field emission scanning electron microscopy (FE-SEM). The results show that when the specific surface area (SSA) of VTs is 768 m2·kg−1 and the content is 40%, the products with a compressive strength of 3.56 MPa and density of 619.1 kg·m−3 meet the requirements of JG/T 266-2011 standard on FC of grades A06 and C3.0; the main mineral phases in the products are calcium silicate hydrate (C-S-H) gel, ettringite (AFt), and calcite, as well as the residual mineral phases after the system reaction include quartz, orthoclase, mullite, pyrite, and PG.

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Preparation of Mine Filling Material from Steel Slag Mud

Cited by 6 publications

References 17 publications

Optimization of Ratio and Hydration Mechanism of Titanium-Extracted Residual Slag-Based Filling Cementitious Materials

Optimization of Ratio and Hydration Mechanism of Titanium-Extracted Residual Slag-Based Filling Cementitious Materials

Fluidity Influencing Factor Analysis and Ratio Optimization of New Filling Slurry Based on the Response Surface Method

Preparation and Performance of Vanadium Tailings-Reservoir Sediment-Phosphogypsum-Based Foamed Concrete

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