An alternative choice is lead, which occurs in most copper and bronze artifacts of the Bronze Age in amounts consistent with the lead being derived from the copper ores and possibly from the fluxes.

可供替代的另一种选择是铅，而铅这种金属也存在于青铜时代绝大部分铜和青铜制物之中，其含量与来自铜矿石的铅以及与有可能来自助溶剂的铅保持一致。

The crushed ores were transported to the assigned place by hoppers and belts and the whole work procedure of the hoppers and belts were automatically controlled by the PLC and sensor.

把破碎后的矿石经漏斗、皮带传输到指定地点，整个过程利用PLC和传感器等设备来自动控制漏斗和皮带的工作。

This is not always true-as with the manufacture of pig iron and steel from low-grade iron ores-but it did lead to the concentration of industrial developments on the coal fields.

并非一概如此—例如从低级铁矿石中生发生铁和钢材的情况一但是这导致了工业发展集中在煤田上。

The floatation-ore concentrate cyanidation process is usually used for vulcanized primary ore and the ores with low silt content and high recovery rate that are easy to concentrate during floatation.

硫化原生矿，含泥量少浮选易富集，回收率较高的矿石，常采用浮选-精矿氰化工艺。

The paper analyse the mechanism of hole-bottom detonating and set forth the crushing mechanism of hole-bottom detonating in medium-length hole blasting decrease the production of big block ores .

分析了孔底起爆的作用机理，阐述了孔底起爆在上向扇形中深孔爆破中能降低大块产出的破碎机理；

The first category includes crude oil, natural gas, coal, other non-metal ores, ferrous metal ores and non-ferrous metal ores while the second includes solid salt and liquid salt.

矿产品包括原油、天然气、煤炭、其他非金属矿原矿、黑色金属矿原矿和有色金属矿原矿；盐包括固体盐和液体盐两种。

It is said that the location of vast reserves of higher-grade ores of most minerals favors increasing dependence of all industrialized regions on imports from less-developed countries.

据说，更高等级的矿石越来越依赖不发达国家的工业化地区。

Based on the status of the scarcity of domestic non-ferrous metal ores, we should explore the overseas resources which will provide the stable and trustable guarantee products.

立足于国内有色金属矿稀缺的现状，开发海外资源，将为中国有色金属行业发展提供稳定而可靠的保障。

In the optimum condition, the method has been applied to phase analysis of copper in the soil containing copper and standard ores recovery test with satisfactory results.

在最佳浸取条件下对含铜土壤中的铜进行物相分析和基准矿物回收试验，结果满意。

Water geochemical survey, one of the geochemical exploration methods, has a great advantage in search for hidden ores and in evaluation of ecological environment for human residence.

水地球化学测量是地球化学勘查的一种重要方法，在寻找隐伏矿方面具有明显的优势，在确定人居生态环境质量方面可以发挥重要作用。