By using the alcohol blast burner a simple and fast method for analyzing tin ore was developed to take the place of the conventional high temperature furnace.

用酒精噴燈替?zhèn)鹘y(tǒng)的高溫爐日日夜夜摸日日夜夜操，體現(xiàn)了快速簡易一级欧美黄片在线播放，并對多種易熔劑進行了對比中文字幕无码亚洲字幕资2021，提出了一種對錫礦砂可行的測試方法一级一级A片。

The process in which iron ore pellets are pre-reduced in a shaft furnace and further reduced in an iron bath reactor is a very competitive smelting reduction process.

以球團礦為原料，采用豎爐預還原和鐵浴終還原相結合的二步法流程是一種極具競爭力的熔融還原流程欧美A片观看视频。

The beneficial effects of a fairly basic slag for suppressing silica reduction and fluorine volatilization in blast-furnace smelting of fluorine-bearing iron ore are discussed in the light of the present results.

從三元系中等SiO_2活度線可以看出提高堿度可大大降低SiO_2的活度国内色站，因而可以對渣中氧化硅的還原和氟的揮發(fā)起有效的抑制作用。