有机粘结剂CL_3在铁精矿球团中的应用研究

APPLICATION OF ORGANIC ADHESIVE,CL3 IN PELLITIZATION OF IRON CONCENTRATE

采用新研制的有机粘结剂ＣＬ３，并配以皂土，对包钢烧结厂铁精矿进行了实验室及工业规模的球团试验。实验室试验指标为：生球抗压大于９８Ｎ／球，干球抗压大于５８８Ｎ／球，成品球抗压大于２３ｋＮ／球，生球落下达４～６２次／球，各项技术指标均优于单用皂土和ＫＬＰ粘结剂。工业试验时，球团原料平均粒度为－００７５ｍｍ占６９４％，加入００６％ＣＬ３粘结剂，生球抗压达到４２１Ｎ／球，干球抗压５７９２Ｎ／球，成品球抗压１９９ｋＮ／球，生球落下３６２次／球。返料及返矿量分别比单用皂土粘结剂时减少７２５％和５６３％，明显提高了设备利用率和生产能力。成品球强度能满足高炉冶炼的要求。复合粘结剂用量比单用皂土时减少５７％。

Laboratory and industrial pelletizing tests iron concentrate from the sintering plant of Baotou Iron and Steel Company are carried out by combined use of recentlydeveloped organic adhesive and bentonite. The laboratory results show that green pellets have a compression strength of above 98 N, dry pellets a compression strength of above 588 N, finished pellets a compression strength of above 23 kN and green pellets falling times of 4～62. All technical indexes obtained by combined use of CL3 and bentonite are higher than those by separate use of bentonite and KLP adhesive. In the industrial test, raw material for pellet production has a mean size of 694 percent minus 0075 mm. After addition of 006% CL3 adhesive, green pellets have a compression strength of 421 N, dry pellets a compression strength of 5792 N, finished pellets a compression strength of 199 kN and green pellets a falling time of 362. Compared with the process of pelletizing by using bentonite alone, recycled feeds from the production stages of green pellets and finished pellets by combined use of CL3 and bentonite are reduced by 725% and 563%, respectively. The compression strength of finished pellets can meet the requirements of blast furnace smelting, and the dosage of the compound adhesive is lower than that of bentonite 57%.