新疆某低品位难选黄铁矿型金矿提金试验研究

新疆某金矿矿石载金矿物与脉石矿物之间嵌布关系复杂,围岩蚀变强烈,含泥量大,泥化现象严重,对载金矿物的浮选影响较大。针对该矿石的特点,通过配合使用捕收剂Y89-0、异戊基黄药和Z-105,以及采用泥砂分选工艺,获得了良好的技术指标,金回收率得到显著提高。原矿金品位为3.43 g/t时,闭路试验可获得金回收率90.86%、金品位42.40 g/t的金精矿。     

某高砷含碳低品位难选金矿浮选试验研究

对某高砷含碳低品位难选金矿进行了浮选试验研究。采用碳酸钠和水玻璃为调整剂, 实现了矿泥分散和脉石矿物的选择性抑制; 采用Y89-0为捕收剂, 实现了对载金矿物(黄铁矿和砷黄铁矿)的选择性捕收。在磨矿细度-0.074 mm粒级占80%条件下, 采用一粗二精三扫闭路浮选流程, 在原矿金品位2.36 g/t时, 可获得精矿金品位36.08 g/t、回收率86.77%的良好指标。     

Utilization of wastewater from zeolite production in synthesis of flotation reagents

The application of waste alkali liquids as a substitute of sodium hydroxide for the saponification to improve the collection performance of fatty acids was investigated by saponification reaction test and flotation test. The results of the saponification reaction test indicated that the optimal conditions for the saponification were stirring rate of 55 r/min, initial temperature of 40 °C and stirring time of 45 min. Meanwhile, the laboratory scale and industrial scale flotation experiments showed that the fatty acid salt synthesized by wastewater achieved an index comparable to fatty acid sodium synthesized by sodium hydroxide. As a consequence, it was feasible to replace sodium hydroxide with the wastewater from zeolite production for fatty acid saponification. The cross-border utilization of waste alkali liquids not only reduced environmental pollution, but also produced excellent economic benefits.     

Differences of cyanide leaching between calcine and dust from refractory gold concentrates

Differences of cyanide leaching between the calcine and the dust from a refractory gold concentrate were investigated by comparative method. Results showed that gold leaching efficiencies of the calcine and the dust were 85.31% and 54.30%, respectively, with direct cyanidation. Contents and existing forms of arsenic and carbon were the main reasons for those differences. The maximum gold leaching efficiencies of the calcine and the dust were 87.70% and 58.60%, respectively, with cyanidation after NaOH pre-leaching. Harmful elements removal, gold loss in NaOH pre-leaching and iron oxides hindrance codetermined gold leaching efficiencies of the calcine and the dust. After H₂SO₄ pre-leaching, the maximum gold leaching efficiencies of the calcine and the dust achieved 94.96% and 80.40%, respectively. The effect of carbonaceous matter was the main reason for differences for leaching efficiencies of the calcine and the dust. Based on those differences, two proper gold extraction processes were put forward, and gold leaching efficiencies for the calcine and the dust achieved 94.91% and 91.90%, respectively.