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针对中条山铜矿峪难选氧化矿特点,即含结合氧化铜高达30%以上,致使铜浮选回收率低于50%,用目前一般常用的浮选法解决此问题尚有困难。本研究提出湿法冶金硫化——浮选的新方案,却在矿浆中添加少量硫磺(2.5公斤/吨矿)于130～180℃进行湿法硫化,使氧化铜矿物(或表石)转变成硫化铜矿物,然后用常规浮选(可不用再添加硫化钠等硫化剂),获得含 Cu 18～20%的硫化铜精矿,对于难选氧化矿的铜回收率约可提高20%左右,对于一般■选氧化矿、硫化矿和混合矿的铜回收率亦可相应提高5～10%,故此法的适应性较好,整个工艺流程亦较简单。这是湿法冶金与选矿相结合处理难选氧化铜矿的一种新方案,对已迠浮选厂的流程改进尤为适用,即不改动现有浮选厂的设备,仅在磨矿与浮选两工序之间增设一湿法硫化工序,而达到增加铜资沅回收及产出较优质精矿的目的,故有可能是处理难选氧化铜矿的一种新途径。
In view of the characteristics of refractory oxide ore in Zhongkuanshan Copper Mine, that is, containing up to 30% of copper oxide in combination, the copper flotation recovery rate is less than 50%. It is still difficult to solve this problem with the current commonly used flotation method. In this study, a new scheme of hydrometallurgical sulphitation-flotation was proposed. However, a small amount of sulfur (2.5 kg / tonne ore) was added to the slurry for wet sulphurization at 130-180 ℃ to transform the copper oxide minerals Into copper sulphide minerals, and then using conventional flotation (no need to add sodium sulfide and other vulcanizing agents) to obtain copper sulphate concentrate containing 18-20% Cu, refractory ore for copper recovery rate can be increased by about 20% , For general ■ election oxide ore, sulphide ore and copper ore recovery can be a corresponding increase of 5 to 10%, so this method is better adaptability, the entire process is relatively simple. This is a combination of hydrometallurgy and beneficiation treatment of refractory copper oxide, a new program has been applied to the flotation process is particularly applicable to the flotation plant that does not change the existing flotation plant equipment, only in the grinding and floating The addition of a wet-process vulcanization process between the two operations will achieve the objective of increasing the recovery and output of better-quality concentrates from Copper Resource and may be a new way to deal with the refractory copper oxide.