After being smelted with fire assay and enriched with cupellation method,the precious metal is decomposed with chloroazotic acid.

试样经火试金法和灰吹富集后,贵金属合粒以王水分解,在盐酸介质中,用火焰子吸收分光光度法测定钯。

Smelting,cast-on outwell and heat treatment handicraft,may accomplish with the type product or material in reference in creating process.

、铸造和热处理工艺,可作为同类型产品或材料在制造过程中的参考。

Sulfide ores with BaSO4 as the main gangue , two kinds of slags , speiss and As-Cu alloy have been identified.

在还中添加了砷矿物，冶的最终产品是砷铜合金，还产生的砷冰铜（黄渣）等副产品中的铜通过返料操作在冰铜工序得以回收。

The variation laws of blast volume,blast pressure,recarburizing rate and silicon loss were studied during the melting process of 5 t cold blast cupola.

研究了5t冷冲天炉过程中,、压、增碳率和硅烧损率随时间的变化规律。

When melting cast iron f or rollers in main frequency induction furnace,the recarburization of the molte n iron could be effectively achieved by using new types of recarburizer.

用工频电炉铸铁轧辊时,采用新型增碳剂可以有效地解决铁液的增碳问题。