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Preparation of Cemented Tailings Backfill with Thermally Activated Ultrafine Iron Tailings Sand
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Feng WANG1, Haojie XIA2, Min LIANG1, Haoquan YANG3, Kui DONG2, Shaoqi KONG2
Mining and Metallurgical Engineering | 2025, 45(2) : 41 - 46
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Mining and Metallurgical Engineering | 2025, 45(2): 41-46
• MINING •
Preparation of Cemented Tailings Backfill with Thermally Activated Ultrafine Iron Tailings Sand
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Feng WANG1, Haojie XIA2, Min LIANG1, Haoquan YANG3, Kui DONG2, Shaoqi KONG2
Affiliations
  • 1.Shanxi Xinyuan Coal Co., Ltd., Jinzhong 045400, Shanxi, China
  • 2.College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
  • 3.Emergency Management Department of Shanxi Province, Taiyuan 030001, Shanxi, China
Published: 2025-04-01 doi: 10.3969/j.issn.0253-6099.2025.02.007
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Ultra-fine iron ore tailings were modified through thermal activation, and then together with some waste rock were taken for mixed calcination. With the mass ratio of iron ore tailings to waste rock, calcination temperature and calcination time as variables, and the compressive strength of specimens and the content of chemically bound water as the objectives for optimization, an orthogonal experiment was carried out to analyze the sensitivity and influence trends of each factor on the target values, and the hydration products of the cemented materials were also analyzed. The results indicate that with an increase in the mass of waste rock, the specimen compressive strength initially increases and then decreases. As the calcination temperature rises, the specimen compressive strength monotonically decreases. As calcination time is prolonged, the specimen compressive strength first decreases and then increases. In consideration of both calcination cost and material performance, an optimal calcination scheme is finally determined, including iron ore tailings and waste rock in a mass ratio of 7∶3, a calcination temperature of 800 ℃, and a calcination time of 2 h. Under these conditions, the 3-day, 7-day and 28-day compressive strengths of the specimens can reach 4.18, 6.36 and 9.87 MPa, respectively. The main hydration products of the cemented materials are calcium silicate hydrate gel, rankinite, ettringite and hydrotalcite.

backfill material  /  iron tailings  /  waste rock  /  orthogonal experiment  /  thermal activation  /  cemented materials  /  tailings utilization  /  compressive strength  /  bound water content
Feng WANG, Haojie XIA, Min LIANG, Haoquan YANG, Kui DONG, Shaoqi KONG. Preparation of Cemented Tailings Backfill with Thermally Activated Ultrafine Iron Tailings Sand[J]. Mining and Metallurgical Engineering, 2025 , 45 (2) : 41 -46 . DOI: 10.3969/j.issn.0253-6099.2025.02.007
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Year 2025 volume 45 Issue 2
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Article Info
doi: 10.3969/j.issn.0253-6099.2025.02.007
  • Receive Date：2024-10-16
  • Online Date：2026-03-19
  • Published：2025-04-01
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  • Received：2024-10-16
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Affiliations
    1.Shanxi Xinyuan Coal Co., Ltd., Jinzhong 045400, Shanxi, China
    2.College of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
    3.Emergency Management Department of Shanxi Province, Taiyuan 030001, Shanxi, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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