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昆钢红矿用褐煤作还原剂和燃料的回转窑磁化焙烧半工业试验,是在云锡公司第二冶炼厂的有效内直径1米、长13米的回转窑上进行的。矿石破碎到0～20毫米,混入0～6毫米褐煤作窑给料。窑排料端伸入一支粉煤喷枪吹褐煤粉为加热燃料,产品在窑排料端以密封状态入螺旋排料机,并同时用水冷却焙矿以免重新氧化。窑给料端排除含尘废气径付烟道入旋风收尘器经鼓式收尘器及气水分离器借引风机排入烟囱。通过300和700吨矿样的试验(平均值)知:旋风收尘器入口烟量(标米~3/小时)分别为1331和1547,含尘浓度(克/标米~3)分别为28及30.6,收尘效率分别为78.5％和86％;鼓式收尘入口烟气量(标米~3/小时)1530和1636,含尘浓度(克/标米~3)分别为4.765和3.48,
The semi-industrial test of the magnetization roasting of rotary kiln using lignite as reductant and fuel at Kunming Iron Red Mine was carried out on a rotary kiln with an effective inner diameter of 1 meter and a length of 13 meters at the second smelter of Yunxi Company. Broken ore to 0 to 20 mm, mixed with 0 to 6 mm lignite for the feed. Kiln discharge end into a pulverized coal spray gun blowing lignite as heating fuel, the product discharge side of the kiln sealed state into the screw discharge machine, and at the same time cooling with water roasting in order to avoid re-oxidation. Kiln to the feeding end to exclude dust exhaust gas path to pay flue into the cyclone dust collector and gas-water separator through the exhaust fan into the chimney. According to the test (average value) of 300 and 700 tons of ore samples, the inlet smoke quantity (standard meters ~ 3 / hour) of the cyclone dust collector is respectively 1331 and 1547, and the dust concentration (g / And 30.6 respectively, and the dust collection efficiency was 78.5% and 86% respectively. The dust concentration (g / m 3) of drum inlet dust was 1530 and 1636 ,