Choose don't over a long period of time, high, but the concentrate recovery from the eduction is close to ore mouth, magnetic double function poor, so concentrate grade is relatively low.
选别时间较长，回收率较高，而精矿排出端离给矿口较近，磁翻作用差，所以精矿品位较低。
This paper introduced emphatically to mining method for the ore-body of gentle dip and medium thickness under the condition of medium or poor stableness of country rocks in upper wall.
本文着重介绍缓倾斜中厚，上盘围岩中稳到稳固性较差条件下的矿体的采矿方法改进实践过程。
Rutile resource is rich in our country, but rutile ore grade is low and the product is poor competitive because of its high production cost.
我国天然金红石资源储量较大，但绝大部分为低品位的原生矿石，所以加工成本高，产品缺乏市场竞争力。
It is found that the dealkalization effect on Baotou acidic pelletized ore is poor.
发现酸性球团矿的脱碱效果很差。
Using theory and methods of process image understanding to study on the pattern analysis for residue of sulfuric acid raw material ore in poor oxygen roast process.
应用过程映象理解的理论和方法，研究硫酸生产原料矿弱氧焙烧矿渣的图象分析。
There is a high quality Anshan type ferrian deposit in the large, thick, poor iron ore beds.
这种大规模巨厚的贫铁矿层中还含有优质的鞍山式富铁矿。
In order to provide a basis for development and utilization of a poor Anshan-type hematite ore, the optimization of the steel ball system of grinding and the concentration tests were carried out.
为了给某鞍山式贫赤铁矿石的开发利用提供依据，对该矿石进行了磨矿钢球制度优化和选别工艺试验研究。
In order to provide a basis for development and utilization of a poor Anshan-type hematite ore, the optimization of the steel ball system of grinding and the concentration tests were carried out.
为了给某鞍山式贫赤铁矿石的开发利用提供依据，对该矿石进行了磨矿钢球制度优化和选别工艺试验研究。
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