In this paper, the method, step and requirement to determine gold and silver content of gold-bearing quartz by fire assay are described.

本文说明了用火试金法测定金块矿中金和银量的方法、步骤。

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We want to buy Iron Oxide, Limonite, Kaolin Clay, Gypsum Calcium Carbonate, Sand Glass, Fire Brick, Feldspar, Quartz, Bentonite, Dolomite Metal Mineral.

我们要采购氧化铁，褐铁矿，高岭土，石膏碳酸钙，砂玻璃，防火砖，长石，石英，膨润土，白云石，非金属矿物。

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My factory productions quartz sand mainly uses in the glass, fire-proof material, smelting ferrosilicon, flux, ceramics, abrasive substance, casting.

我厂生产的石英砂主要用于玻璃，耐火材料，冶炼硅铁，冶金熔剂。

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