1 Clinker, Cement, Minerals , Lead Ore, Zinc Ore Minerals and Refractories.

2 They also follow the detention of Rio lead ore salesman in China two months ago.

3 For instance, lead ore often contains silver and silver ore often contains gold, so the idea that lead "ripens" into silver, and silver into gold, is certainly worth entertaining.

4 Consistence between isotopic model age of lead ore and intrusion age of quartz porphyry shows close relations among structure movements,[] magmatism and mineralization in Stage of Yenshan.

5 Not until the 16th century did the English discover a large deposit of pure graphite, then called plumbago (Latin for "lead ore").

6 Lead ore : British lead ores have been worked since pre - Roman times. It contains silver.

7 Lead ore: British lead ores have been worked since pre-Roman times.

8 The kilns were used to process silver and lead ore and are no longer in operation today.

9 Mineral resources are mainly tungsten ore, lead ore, zinc, and clay mineral - based.

10 The method is simple, rapid, sensitive and has been applied to the determination of Cu in lead ore sample with satisfactory results.

11 The results show that, the increase of lead eco-efficiency can help for lead ore conservation and environmental improvement.

12 The ore is lead mine of partial oxidation, the lead ore consists chiefly of galena and cerusite. 39% of cerusite is the most oxid in lead ore.