The reductive decomposition method has the advantages over the classic ore melting method with sodium peroxide in analytical accuracy, reproducibility, ease of operation and rate of analysis, etc.

锡矿石试样的还原分解，在测定的准确性、结果的重现性、操作的简易程度以及分析的速度等方面，均优于经典的过氧化钠熔矿方法。

youdao

Rock wool carpet is insulation and other natural basalt ore, etc as the main raw material, by high temperature melting into fine, join the amount of processing from the binder.

岩棉保温毡是以玄武岩及其它天然矿石等为主要原料，经高温熔融成纤，加入适量粘结剂加工而成的。

youdao

Rock wool insulating tubes is basalt and other natural ore, etc as main raw materials, by high temperature melting in a fiber, stir-in binder, curing processing and is made.

岩棉保温管是以玄武岩及其它天然矿石等为主要原料，经高温熔融成纤，加入适量粘结剂，固化加工而制成的。

youdao

He read about something called direct-reduced iron, a technique for smelting without melting--removing the oxygen from iron ore while it's still solid, that is.

FORBES: Carnegie would be jealous