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竖炉球团加有机粘结剂的经济效益 总被引:1,自引:0,他引:1
选择膨润王最便宜的球团厂为例,计算分析添加人格伉的有机粘结剂后的经济效益.球团矿只有实行优质优价政策,竖炉球团有可能使用有机粘结剂.计算结果表明,在年产30万吨球团矿的条件下,当TFe品位提高1%,售价增加7~9元/t时,投篱产出的利润为70.、!154.1万元/a。 相似文献
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针对有机粘结剂SN与膨润土复合而成的粘结剂,研究了其对球团生产指标的影响.试验结果表明:该复合粘结剂是一种成球性能良好的粘结剂,能有效地提高生球强度;同时,具有较好的抗爆裂性能,当复合粘结剂E、F添加量为08%,动爆温度由500 ℃升至700 ℃时,其生球无爆裂发生;而且它对成品球抗压强度的影响并不明显,可大大降低膨润土用量,提高球团矿品位. 相似文献
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为降低球团工艺的粘结剂用量,提高球团矿品位和产量,采用ZX-Ⅱ型粘结剂进行了生产酸性球团矿的工业试验,并取得了良好的效果。 相似文献
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在宣钢8m^2球团竖炉上采用含有机粘结剂的改性钠基膨润土替代普通钙基膨润土进行了工业试验。结果表明:改性钠基膨润土具有比普通钙基土更优良的性能,能明显提高生球的落下强度。 相似文献
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本文从降低氧化球团的膨润土用量出发,进行中膨润土 ,有机粘结剂和有机=无机复合粘结剂的造球性能试验,从结剂与精矿粉的混合效果,成品球的质量和成本综合考虑,氧化球团采用复合粘结剂是最佳选择。 相似文献
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为探索开发MgO球团矿用的新型含MgO添加剂,在实验室开展了造球和生球爆裂试验,并在此基础上进行工业投笼试验,寻找和分析最佳的镁质黏结剂的配比与对应的工艺参数,为太钢峨口铁矿下一步生产镁质球团矿提供了技术支持. 相似文献
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提高有机粘结剂球团强度的试验研究 总被引:2,自引:0,他引:2
S型粘结剂是一种粘性很大的有机物,具有极强的吸湿性,保水性和阳离子交换性,高温下全部燃烧挥发,但单独使用,焙烧温度在1200-1220℃范围内,成品球团矿的强度很难满足大高炉冶炼的要求。为此进行了试验研究,研究结果:加入一定量的X型添加剂,可大大提高原有粘结剂球团的强度,满足生产要求。 相似文献
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Large amounts of fines and superfines are generated in Indian iron ore and coal mines due to mechanized mining and mineral dressing operations. Utilization of these fines for extracting metal is of vital concern for resource utilization and pollution control. For agglomeration of these fines, a suitable binder is required. Iron ore-coal composite pellets were prepared by cold bonding. Various binders such as lime, Ca(OH)2, slaked lime, dextrose, molasses, and sodium polyacrylate (SPA), alone or in combination, were employed for making composite briquettes. The slaked lime–dextrose combination produced the highest strength among the various binders employed for producing composite briquettes and was therefore selected for producing composite pellets for the smelting reduction. In cold bonding, the composite pellets attain the requisite properties due to physico-chemical changes of the binder in ambient conditions. It was possible to obtain a dry strength of more than 300 N per pellet in some cases and more than 200 N per pellet in many trials. Drop strength and shatter index values of composite pellets were also measured. In the present paper an attempt has been made to evaluate the mechanical properties of cold-bonded composite pellets so as to throw some light on the capacity of these pellets to withstand stresses during handling and transportation. 相似文献
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济钢球团生产中赤铁精矿配比增加后,竖炉利用系数下降,球团矿质量降低。为了改变这一状况,球团厂实施了竖炉使用高炉-转炉混合煤气改造,并取得了显著效果。在赤铁精矿配比为30%的条件下,竖炉利用系数提高,球团矿质量改善。同时,转炉煤气在球团生产中的大量使用,为济钢提高转炉煤气回收量,实现负能炼钢奠定了基础,也开辟了一条转炉煤气利用的新途径。 相似文献
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An experiment for the oxidation process of single magnetite pellet and theoretical analysis based on modified unreacted core shrinking (MUCS) model were carried out, and the controlling mechanisms of the initial and developing reactions were examined, respectively. From the study of the initial reaction, it was found that the chemical reaction of surface is the controlling step of the overall reaction when the temperature is up to about 750 K, while the mass transfer through the gaseous boundary layer dominates the reaction rate when the temperature is above 750 K. As the reaction developing within the pellet, the mass transfer through the produced layer becomes the controlling step. In addition, the effects of reaction conditions (such as oxygen concentration, temperature) on the fractional oxidation of magnetite pellet were determined. 相似文献
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以巴西镜铁矿为研究对象,进行了生球制备试验和预热焙烧小型试验。试验结果确定了生球制备试验的最佳参数和球团预热焙烧试验适宜的预热焙烧制度。生球制备试验的最佳参数:膨润土用量为2.1%,造球水分为8.5%(质量分数),造球时间为13 min,此时落下强度为5.0次/(0.5 m),生球抗压强度为11.26 N/个,爆裂温度为356℃,符合球团生产对生球质量的要求。球团预热焙烧试验适宜的预热焙烧制度:预热温度为900℃,预热时间为10 min,焙烧温度为1 200℃,焙烧时间为15 min,此时预热球强度能达到500 N/个以上,焙烧球强度能达到2 500 N/个以上,符合高炉对球团矿的质量要求。 相似文献