Channeling can be prevented by adding sponge iron and synthetic rubber powder in cement slurry.
提出消除微裂缝-微环隙的防窜措施，是在固井水泥浆中添加海绵铁及合成橡胶粉。
The company's main: gold card various kinds of specifications, a return to powder, second powder, sponge iron.
本公司主营：金粉牌各种规格一次还原铁粉、二次粉、海绵铁。
Using sponge iron reduced by iron ore concentrate powder as raw material, the smelting process of pure iron is investigated through non vacuum induction furnace and vacuum induction furnace.
以由铁精矿粉直接还原出来的海绵铁为原料，以非真空感应炉和真空感应炉为冶炼设备，对纯铁的冶炼工艺进行了研究与试验。
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