依据某萤石矿的原矿性质进行选矿工艺试验,经选矿工艺的方案比较后,最终确定采用一次粗选、二次扫选、五次精选的工艺流程,试验获得品位96.42％ 、回收率90.06％ 的合格萤石精矿,取得了比较理想的技术指标.

笔者在本文中对内蒙古地区萤石矿尾矿的分布情况、矿床类型、再利用方式和未来综合利用展望等信息做了初步探索,这些信息对于目前正在开采生产的萤石矿厂可能有一定的现实意义,同时,了解这些信息对未来萤石矿尾矿的深入研究与开发也会有更加长远的影响.

总结了内蒙古地区铅锌矿尾矿资源分布情况和综合利用现状,以期为今后能够更好地开发利用铅锌矿尾矿资源提供数据资料.

内蒙古金矿的尾矿规模大小不等,分布不均,分布面积广,尾矿中含金品位在0.3g/t左右,尾矿中还含有多种有价金属元素.目前内蒙古地区金矿的尾矿开发利用也得到了重视,为了今后能够更好的开发利用金矿尾矿资源,本文总结了内蒙古地区金矿尾矿分布特征和利用现状,并提出了一些建议和展望.

内蒙古某银铅锌尾矿堆存面积较大,尾矿中含铅品位0.36%、锌品位0.38%、银品位34.00g/t,针对该尾矿的性质做了综合回收再利用试验,确定选用摇床重选工艺,最终在尾矿不磨的情况下可以得到混合精矿:其中含铅品位2.53%、回收率50.40%;含锌品位2.35%、回收率50.33%;含银品位290.40g/t、回收率59.24%,有效地回收了尾矿中的有价金属.

The total Fe content of an ultra-low-grade magnetite in Shandong is only 16.41%,and the main ore mineral is magnetite.In this study,magnetic separation was used to test roughing grinding fineness,roughing magnetic intensity,concentration conditions and final conditions.The experiment results showed that the process flow of two concentrations and one scavenging is suitable.Under the condition of grinding fineness of 80%-0.074 mm,concentration magnetic intensity of 600 kA/m in the primary stage,concentration magnetic intensity of 400 kA/m in the secondary stage and one scavenging magnetic intensity of 1200 kA/m,the TFe content in concentrate powder is about 60% and the concentrate yield is between 11% and 12%.

某褐铁矿石,属沉积变质型矿床,储量大,矿石中铁的平均品位为35.09%.铁矿物大多以褐铁矿的形式存在,少部分以赤铁矿形式存在.本文通过对该矿石中的铁矿物的化学组成、嵌布特征、赋存状态和结构构造做了分析,最终确定采用强磁选预先抛尾,粗精矿再磨再选的工艺流程,可以有效回收矿石中的褐铁矿和赤铁矿.

依据某铜硫矿的原矿性质进行选矿工艺试验,经选矿工艺的方案比较后,最终确定采用抑硫浮铜优先浮选的工艺流程.试验不仅获得了品位16.33%、回收率90.77%的合格铜精矿,而且矿石中的硫得到了综合回收,硫精矿品位34.17%、回收率80.69%,取得了比较理想的技术指标.

为考察某含砷原生金矿小试工艺流程及技术指标的稳定性及合理性,模拟生产状态进行了扩大连续试验.连选试验采用阶段磨矿—浮选—重选联合工艺流程,有效回收了矿石中的有用矿物金、砷.浮选作业获得了金品位为48.02 g/t、回收率为81.41%的金精矿(含砷品位为9.84%、回收率为94.21%),重选作业获得了金品位为46.48 g/t、回收率为2.95%的金精矿.连选试验技术指标与实验室闭路试验技术指标基本一致,连选过程平衡、各作业运行稳定,取得了较可靠的选矿指标及工艺参数.

把低毒环保氰化钠替代品——金蝉黄金选矿剂(简称金蝉)成功地应用于内蒙古四子王旗石英脉型金矿,获得金浸出率90.11％;与传统的氰化钠浸金剂做对比,浸出率低1.52％(氰化钠浸出率为91.63％),为开发该金矿提供了实施依据.

针对在金矿堆浸生产过程中发现的一些实际问题进行了分析,优化了影响浸出指标的工艺流程,最终确定了更加合理的堆浸工艺参数,并缩短了堆浸周期,提高了堆浸厂的经济效益.

Large quantity of cyanide barren solution is produced during the process of glod cyanide leaching,which contains many kinds of cyanide complexes and impurities.Whether the barren solution could be recycled or not is unknown.To investigate the influence of impurities on the process of cyanide leaching,the type and content of the impurities were determined first.Then under the same condition except the difference of fresh water and barren solution,the test of cyanide leaching was carried on.The impurity content in the barren and pregnante solution was written down.At the same time,the leaching time and the leaching rate were accounted and their relation curve was drawn.The test results show that the impurity content in the barren and pregante solution produced from the barren solution reuse is almost the same as that from the fresh water,which does no harm to the production of cyanide leaching.Furthermore,under certain condition the leaching reaching is slightly higher than that by using fresh water.Therefore,the barren solution can be returned to be reused.

Based on the mineralogy process study of the magnetite ore,proves that the content of Fe is 54.90%,and the main magnetic minerals are magnetite ore.For the magnetite ore character,developed the flow of low intensity magnetic separation.When the degree of grinding is 55.77%(-0.074mm) and the magnetic intensity is 66 mT,using the low intensity magnetic separation,obtained an iron concentrate with 87.99% recovery and an iron grade of 64.53%.The enrichment ratio is 1.18,and the concentration ratio is 1.41.

The xanthate played a great role in promoting the flotation technology progress,almost all kinds of the xanthate could be used as a flotation collector,and it is widely used in the field of flotation.But there are highly toxic components in the xanthate.This paper combinate the domestic practical experiences with the foreign practical experiences to comprehensively elaborate the hazards of the xanthate and the issues should be noted.

Some ore contains zirconium-hafnium of 1.97% in Jiangxi,is treated using gravity separation.Adopt the technological process of rough concentrate and scavenging concentrate by spiral chute,then for acquire rough preparation concentrate,adopt the process of one stage rough,scavenging and concentrate by table concentrator.Concentrate grade of zirconium-hafnium reaches 57.72% and recovery is 65.60%.