熔剂的英文：
flux

To apply a flux to.
使用助熔剂

Melting behavior of silica flux in the converting process of high grade copper matte was investigated
研究了高品位铜冰铜转炉吹炼石英熔剂熔化行为。

Briefly speaking, the other major raw materials for blast furnace smelting include fuels, fluxes and air.
简单地讲．用于高炉冶炼的原料除了铁矿石外，还有燃料、熔剂和空气。

The market is in a constant state of flux.
市场行情在不断变化。

Organization of the company be then in a state of flux.
当时公司的编制正处于不稳定状态。

Organization of the company was then in a state of flux.
当时公司的编制正处于不稳定状态.

The world is in continuous flux and is impermanent.
世界变迁不已，并非是常久不变的。

We have to compute the integral for flux.
我们需要计算通量的积分。