高硫锰矿湿法预处理脱硫方法研究

发布时间：2018-06-06 03:09

本文选题：高硫锰矿 + 预处理　；参考：《重庆大学》2015年硕士论文

【摘要】：近些年,随着矿物资源的日益枯竭,富矿越来越少,品位低、粒度细、矿物组成复杂的难选矿石所占比例日益增大。锰是钢铁产业中非常重要的元素,我国锰系合金及金属锰产量日益增长,这使得锰矿石的消费量逐年增加。高硫锰矿在我国锰矿储量中占有很大的比例,但是硫对钢铁的危害却很大,因此高硫锰矿的除硫问题和资源化利用日益突出。所以,建立高硫锰矿综合利用的方法,研究经济有效的脱硫技术,是提高锰矿资源化利用,促进矿区可持续发展的重要途径。本文以重庆市某锰矿区的高硫锰矿为研究对象,首先采用多种分析手段对其基本性质进行了初步分析,然后选择湿法预处理的方式对其进行脱硫试验,并详细研究了在湿法预处理过程中各种添加剂的参数条件。在湿法预处理试验中,主要研究了用氢氧化钠、五氧化二钒、蒽醌双磺酸钠(ADA)、偏钒酸铵、栲胶(KCA)等试剂在预处理过程中的影响。实验结果表明:①当只加入氢氧化钠时,锰品位最高为26.4%,硫含量最低为0.092%,硫锰比为0.0035。在此组实验中对提高预处理后锰矿中的锰和降低预处理后锰矿中的硫效果最好。②当加入五氧化二钒时,同时加入氢氧化钠和ADA预处理之后,锰品位最高为27.1%,此时的硫含量为0.11%,硫锰比为0.004,硫含量最低为0.098%,此时的锰含量为26.6%,硫锰比为0.0037。在此组实验中对提高预处理后锰矿中的锰和降低预处理后锰矿中的硫效果最好。③当加入偏钒酸铵时,同时加入氢氧化钠和ADA预处理之后,锰品位最高为26.7%,此时硫含量为0.117%,硫锰比为0.0044,硫含量最低为0.101%,此时锰含量为26.5%,硫锰比为0.0038。将KCA代替ADA时,锰品位最高为23.9%,此时硫含量为0.102%,硫锰比为0.004,硫含量最低为0.086%,此时锰含量为23.5%,硫锰比为0.0037。在此组实验中,使用的两种催化氧化剂对提高预处理后锰矿中的锰和降低预处理后锰矿中硫的效果相似。将湿法预处理后的锰矿用浓硫酸进行浸取实验,使锰矿中的锰以硫酸锰的形式浸出,通过实验表明:预处理后锰矿浸出液中锰含量有所提高,且预处理效果明显的锰矿浸取之后,浸出液中锰含量在35%以上。将在酸性条件下浸取的硫酸锰溶液进行一系列的除杂后,加入电解添加剂制备成电解锰合格液。通过电解实验表明:金属锰能够在阴极板上沉积且效果明显。
[Abstract]:In recent years, with the depletion of mineral resources, the proportion of refractory ores with low grade, fine granularity and complex mineral composition is increasing. Manganese is a very important element in iron and steel industry. The production of manganese series alloys and metal manganese in China is increasing day by day, which makes the consumption of manganese ore increase year by year. High sulfur manganese ore occupies a large proportion of manganese ore reserves in China, but sulfur does great harm to iron and steel, so the problem of sulfur removal and utilization of high sulfur manganese ore is becoming more and more prominent. Therefore, it is an important way to improve the utilization of manganese ore resources and promote the sustainable development of mining area by establishing the comprehensive utilization method of high sulfur manganese ore and studying the economical and effective desulphurization technology. In this paper, the high sulfur manganese ore in a certain manganese ore area in Chongqing is taken as the research object. Firstly, the basic properties of the ore are preliminarily analyzed by a variety of analytical methods, and then the desulfurization test is carried out by means of wet pretreatment. The parameters of various additives during wet pretreatment were studied in detail. The effects of sodium hydroxide, vanadium pentoxide, sodium anthraquinone disulfonate, ammonium metavanadate and tannin extract KCA on the pretreatment were studied. The experimental results show that when only sodium hydroxide is added to 1, the highest manganese grade is 26.4m, the lowest sulfur content is 0.0922.The ratio of sulfur to manganese is 0.0035. In this group of experiments, the best effect is to increase the manganese content in the pretreated manganese ore and to reduce the sulfur content in the pretreated manganese ore. 2. When vanadium pentoxide is added, sodium hydroxide and ADA are added at the same time. The highest grade of manganese was 27.1, the sulfur content was 0.11, the ratio of sulfur to manganese was 0.004, the lowest was 0.098, and the manganese content was 26.6and the ratio of sulfur to manganese was 0.0037. In this group of experiments, the effect of improving manganese in manganese ore after pretreatment and reducing sulfur in manganese ore after pretreatment was best. 3. When ammonium metavanadate was added, sodium hydroxide and ADA were added at the same time. The highest grade of manganese is 26.7.The sulfur content is 0.1177.The ratio of sulfur to manganese is 0.0044, the lowest is 0.101, the manganese content is 26.5 and the ratio of sulfur to manganese is 0.0038. When KCA was used instead of ADA, the manganese grade was 23. 9%, the sulfur content was 0. 1022, the sulfur to manganese ratio was 0. 004, the lowest sulfur content was 0. 086, the manganese content was 23. 5% and the sulfur-manganese ratio was 0. 0037. In this group of experiments, the effect of the two kinds of catalytic oxidants on the increase of manganese in the pretreated manganese ore and the reduction of sulfur in the pretreated manganese ore is similar. The wet pretreated manganese ore was leached by concentrated sulfuric acid, and the manganese in manganese ore was leached in the form of manganese sulfate. The experiment showed that the manganese content in the leaching solution of manganese ore increased after pretreatment. After leaching of manganese ore, the manganese content in leaching solution is over 35%. After a series of impurity removal, the manganese sulfate solution soaked in acid condition was added to the electrolytic additive to prepare the electrolytic manganese qualified solution. The electrolysis experiment shows that the metal manganese can be deposited on the cathode plate and the effect is obvious.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD951

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