Tailings static flocculation sedimentation test in Sanshandao Gold Mine
  
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DOI:10.3969/j.issn.1671-4172.2019.06.023
KeyWord:tailings; fillback; flocculation; sedimentation
           
AuthorInstitution
GAO Xuan1,2 (1. 北京矿冶科技集团有限公司 矿物加工科学与技术国家重点实验室,北京 ;2. 北矿机电科技有限责任公司 北京市高效节能矿冶技术装备工程技术研究中心,北京 ;3. 山东黄金集团有限公司,济南)
ZHANGJianhui1,2 (1. 北京矿冶科技集团有限公司 矿物加工科学与技术国家重点实验室,北京 ;2. 北矿机电科技有限责任公司 北京市高效节能矿冶技术装备工程技术研究中心,北京 ;3. 山东黄金集团有限公司,济南)
PEI Dianfei3 (1. 北京矿冶科技集团有限公司 矿物加工科学与技术国家重点实验室,北京 ;2. 北矿机电科技有限责任公司 北京市高效节能矿冶技术装备工程技术研究中心,北京 ;3. 山东黄金集团有限公司,济南)
WANG Qingfen1,2 (1. 北京矿冶科技集团有限公司 矿物加工科学与技术国家重点实验室,北京 ;2. 北矿机电科技有限责任公司 北京市高效节能矿冶技术装备工程技术研究中心,北京 ;3. 山东黄金集团有限公司,济南)
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Abstract:
      Tailings backfill is not only the fundamental measure to solve the pollution problem and to eliminate the potential safety hazards of tailings reservoir, but also conducive to improving the comprehensive utilization rate of resources and reducing land occupation. Paste filling technology is an important development tread of tailings backfill. One core of tailings backfill is how to obtain qualified tailings paste. Therefore, it is very important to study the tailings flocculation sedimentation process to obtain high concentration underflow and low overflow turbidity. Orthogonal test and coupling test were used to obtain the sequence of influencing factors of slurry flocculation sedimentation speed and clarification layer turbidity. The optimum flocculation parameters were obtained as follows: pulp concentration 20%, flocculant dosage 20 g/t, anionic polyacrylamide, normal temperature and pulp pH=6.0. Under the optimum parameters, the ultimate average concentration of natural flocculation sedimentation pulp is 60%, and the ultimate average concentration of pulp can reach 66% by increasing disturbance, crushing flocs and secondary sedimentation of flocs. This paper provides scientific guidance for tailings treatment of Sanshandao Gold Mine.
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