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1·Solution mining is a available method to extract gold from lean ore, relic, waste dumps and tailings.

溶浸采矿是从贫矿、残矿、废石堆、尾矿中提取金的一种行之有效的方法。

2·Description is made of the development and utilization of Ni lean ore resource and mine production in Jinchuan Mine.

金川公司龙首矿西采区贫矿开采研究，关系到贫矿开采能否可行，是金川做大做强的关键之一。

3·This paper introduced the experiments on the large grain size and high heap gold leaching of stripped lean ore from open pit mining of gaolong co.

介绍了高龙公司利用露采剥离贫矿进行大粒度、大堆高的堆浸提金试验。

4·There are huge potential in utilization of lean ore in China, and utilization of lean ore is an inevitable choice for guaranteeing resources safety.

我国大宗贫矿资源利用潜力巨大，贫矿资源利用是保障资源安全的必然选择。

5·By means of SEM, EDAX and om, the petrographic structure and microscopic chemical composition of cement clinker have been researched by adding rare-earth lean ore.

采用SEM、EDAX、OM等分析测试方法，研究了稀土贫矿掺加条件下，水泥熟料的岩相结构及其微区化学组成。

6·Small scale tests and verification tests of magnesia reduction concentrating process for treating rich lean ore mixture from Longshou Mine in Jinchuan were carried out.

对金川镍矿龙首矿混合矿石进行了降镁工艺小型试验和验证试验。

7·In mining the extremely fractured thin ore body, the separation of waste rock in the conventional shrinkage stoping was replaced by the separation of the rich ore and retaining the lean ore.

对极破碎薄矿体的开采，采用了将常规的留矿法中分选废石改为分选富矿石留贫矿石的采矿方法。

8·In our country, the resource of iron ore is scarce; ore content are lean and the cost of exploitation is high.

我国是铁矿石资源贫乏国家，矿石品位低，开采成本高。

9·Of freightage of Chinese foreign trade 93% it is to lean Marine will finish, the crude oil entrance of 95%, iron ore entrance of 99% all depends on canalage.

中国外贸货物运输的93%是靠海运来完成的，95%的原油进口、99%的铁矿石进口均依靠水路。

10·The lean magnetite ore can be turned into one that has utilization value by wet preconcentration by magnetic separation after fine crushing to discard most of qualified waste.

通过采取细碎后湿式磁选预选方法，抛除掉大部分合格废石后，可以将该贫磁铁矿变成为具有开发利用价值的矿物。