但是，熔剂保护法和气体保护法致使熔炼工艺及设备复杂化、易产生央杂，并且污染环境；
However, both flux and protective gas would lead to some problems such as inclusion, environmental pollution and complication of melting process and equipment.
主要考察了熔剂粒度、铜品位、入气体流量和氧浓度对石英溶剂熔化的影响。
Several factors affecting the melting of silica flux, such as the size of silica flux, matte grade, blowing air and oxygen enrichment were discussed.
综述了镁合金非熔剂净化中常用的工艺方法，重点对非熔剂净化工艺中的泡沫陶瓷过滤、旋转喷吹气体净化的工作原理、冶金特点及应用现状作了详细阐述。
The principles, metallurgic characters of ceramic foam filtration and spinning spraying were illustrated in detail, as well as the recent utilities on magnesium industry.
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