Low Quality Ore

The effect of high silicon low iron material on softening temperature, balling index, quality and output of sintering ore was investigated.

分析了高硅低铁物料对铅锌矿软化温度、成球性指数、烧结矿质量与产量的影响。

There are large coal fields in the vicinity of high-quality, low-cost inland through the Great Lakes and into the superior iron ore.

附近有优质大煤田，通过大湖和内河廉价运入苏必利尔的铁矿石。

A key to ore dressing of quartz sands includes rude ores of high or low quality, occurrence and distribution of detrimental impurity such as iron and aluminium in size grades of placer deposits.

石英砂原矿质量的优劣，有害杂质铁、铝的赋存状态及其在各粒级砂矿中的分布，是决定选矿效果的关键。