摘要
某低品位多金属金矿中含有金、银、铅、铁等多种有价元素,有用矿物嵌布关系复杂且粒度较细,含量较低但综合利用价值较高。原矿在磨矿细度-0.074mm含量60%、捕收剂丁黄药和丁铵黑药用量分别为64g/t、13g/t的条件下进行混合浮选,获得金、银、铅混合精矿。混合精矿在pH值为11、矿浆浓度40%、氰化钠用量5kg/t、浸出时间36h的条件下进行氰化浸出获得金、银,对原矿金、银回收率分别为67.24%、38.30%。浸渣在抑制剂氧化钙用量1500g/t、捕收剂乙硫氮和丁铵黑药用量分别为40g/t、10g/t的条件下进行浮铅试验,获得了对原矿铅品位45.32%、回收率53.98%的铅精矿和对原矿回收率为3.16%、5.07%的金、银,金、银总回收率分别为70.40%、43.37%。混合浮选尾矿在磁场强度为111kA/m的条件下,通过一段粗选一段精选,获得了铁品位56.30%、回收率12.76%的铁精矿。采用此工艺综合回收了有价金属,获得了较好的选别指标,为该矿的开发利用提供了重要依据。
A gold ore containing gold, silver, lead, iron elements is of the characteristics of complex relationship, fine dissemination grain sizes, low grades and high comprehensive utilization value. First, bulk flotation that grinding fineness was -0. 074mm60% and xanthate （64g/t） and ammonium dibutyl dithiophosphate （13g/t） were used as collectors was applied and a bulk concentrate containing gold, silver, lead was obtained. Second, gold and silver were recoveried efficiently with the recovery of 67.24% and 38. 30% respectively for run-of-mine with cyanide leaching from bulk concentrate on condition that the pH was ll,the pulp density was 40%, the dosages of sodium cyanide was 5kg/t and the leaching time was 36h. Third,while calcium oxide （1500g/t） as suppressant and diethyldithiocarbamate（40g/t） and ammonium dibutyl dithiophosphate （10g/t） as collectors were used, lead flotation test from leaching residue was conducted that lead concentrate （Grade.. 45.32%, Recovery rate： 53.98%） was obtained and the recovery of gold,silver was 3.16% and 5.07% respectively and the corresponding total recovery was 70.40% and 43. 37% respectively. Finally, magnetic separation from bulk flotation tailings was used through the processing of one stage roughing and one stage cleaning under the condition that magnetic intensity was 111kA/m and iron concentrate （Grade..56.30 %, Recovery rate 12.76%） was obtained, gold,silver,lead, iron elements were recoveried efficiently and separating index was fine through the mineral processing which provides important basis for developing the deposit.
出处
《中国矿业》
北大核心
2014年第10期115-117,120,共4页
China Mining Magazine
基金
国土资源部地质大调查项目"豫西难选铅锌矿浮选分离技术研究"资助(编号:1212011120300)
关键词
金矿
铅
多金属
综合回收
gold ores lead
polymetallic
comprehensive recovery
