共查询到20条相似文献,搜索用时 125 毫秒
1.
2.
3.
4.
制备硫酸锰最佳工艺条件的研究 总被引:18,自引:5,他引:13
对软锰矿与黄铁矿、硫酸直接浸取制备硫酸锰进行了实验研究,得出了最佳工艺条件。当浸出条件为软锰矿:黄铁矿:硫酸为1:0,3:0.45,浸出温度为96℃,浸出时间7h,固液比1:5时,锰的浸出率可达97.00%。该工艺具有能源消耗少,生产成本低。锰的回收率高等优点。 相似文献
5.
6.
7.
本文针对四川冕宁稀土矿床中含锰高(17.56% )的黑色风化物难以用氯化法回收稀土这一问题,采用SO2 作为还原剂,在液固比3∶1 的条件下,常温浸取黑色风化物中的锰,经3h 通SO2 浸取,锰浸出率达90% 以上。经预处理脱锰的浸渣,进一步采用氯化铵焙烧- 水浸方法回收稀土,稀土浸出率达75.6% 。 相似文献
8.
9.
本文报道了对苯二酚生产过程中废锰催化剂内所含主要元素锰、钴、镍、铁的硫酸浸取行为。认为锰的浸取反应原理由硫酸与二氧化锰的氧化还原反应,及铁、氧化亚铁与硫酸反应所生成的硫酸亚铁与二氧化锰的氧化还原反应组成。实验中选择了不同的搅拌转速、液固比、浸取剂硫酸的浓度、温度等操作条件,考察了锰、铁、镍、钴的浸取情况,其中温度的影响最显著。在浸取温度为80℃,浸取剂硫酸浓度为2.8mol/L,液固比为6.6:1,搅拌转速为250rpm,浸取反应时间为3.5h的条件下,锰的浸出率几乎达到100%,铁的浸出率为75%。镍,钴在所有的实验条件下,浸出率均接近100%。 相似文献
10.
11.
《钢铁冶炼》2013,40(1):31-36
AbstractManganese rich slag produced by the appropriate treatment of high manganese pig iron has a high manganese content and results in low fines, is low cost and gives low excess oxygen. Manganese recovery from this slag in the form of manganese ferroalloys compensates for the excess cost of the treatment process. Manganese rich slags produced from the injection of high manganese pig iron under at optimum conditions have levels of (Mn)>35 wt-%, (Mn)/(Fe)>7.65, (Mn)/(Si)>2 and (Mn)/(P)>285, which satisfy requirements for use as raw material in silicomanganese alloy production. Various experiments were carried out to smelt high manganese slag resulting from the treatment of high manganese pig iron to produce silicomanganese in a bench scale submerged electric arc furnace. Use of such manganese rich slag in the proportion of 40% of the blend has been found to be optimum to obtain a silicomanganese alloy with the highest metallic yield and highest manganese recovery. The silicomanganese alloy produced satisfies the standard chemical specifications, with manganese and silicon contents 68 and 18%, respectively. 相似文献
12.
以电解二氧化锰过程中硫化除重金属的硫化渣为原料,基于热力学分析结果,以稀硫酸为浸出剂,辅以软锰矿协同氧化浸出硫化渣,以回收其中的锰、钴、镍有价金属。考察了矿渣比、始酸浓度、液固比、反应温度对锰、钴、镍浸出率的影响。结果表明,适宜条件为:温度363.15 K、矿渣比0.08、始酸浓度90 g/L、反应时间180 min,锰、钴、镍的浸出率分别为93.5%、87.4%、86.3%。 相似文献
13.
本文通过生产实践得出,含 Mn18—28%,(Mn Fe)38—48%的铁锰矿都可在高炉中生产富锰渣。利用高磷高铁的铁锰矿和低磷高硅贫锰矿进行配矿入炉,采用自然碱度酸性渣操作,控制渣中SiO_2含量在24—30%,可以炼出低磷低铁优质富锰渣。 相似文献
14.
利用天然二氧化锰粉与硫化锰精矿为原料制备高纯一水硫酸锰,并取得了初步成功。其最优工艺为:以二氧化锰与硫的摩尔比为2.25:1,在温度90~C条件下浸出3h后,除渣,再用A试剂1.5倍理论用量除去硫酸锰溶液中的钾钠,按工业硫化钡1.5倍理论用量除去各重金属,用氟化锰5倍理论用量除去钙镁后蒸发结晶烘干,得到高纯一水硫酸锰产品。 相似文献
15.
主要以锌电积过程中产生的锌阳极泥为原料,采用全湿法工艺流程,开展对锌阳极泥综合回收处理,先经酸洗,然后在硫酸介质中进行还原浸出,浸出液经净化、合成等工序,生产出更具应用与市场前景的锰产品。试验结果表明:锌阳极泥通过酸洗,锌的脱除率达90%以上,再经还原浸出,锰的浸出率超过92%,合成得到的锰产品符合国家标准要求,锰回收率在90%以上。浸出渣为铅银渣,渣中铅、银含量较锌阳极泥富集了3~4倍,利于后续铅银等贵金属的回收利用。 相似文献
16.
The possibility of replacement of the high cost sinter manganese ore by manganese rich slag for the production of high carbon ferromanganese was experimentally demonstrated. The experimental heats were designed and carried out to optimize this replacement through the adjustment of different production parameters. The results of pilot plant experimental heats showed that replacement of 50% of the sinter in the blend (or 25% of the blend) by slag containing 32% Mn and operation under slag basicity 0.9 and low (MgO)/(CaO) ratio of about 0.2-0.3 are the optimum conditions to attain the highest manganese content in the produced ferromanganese, the highest manganese recovery and the highest metallic yield. The industrial application of reusing manganese slag clarified the economic efficiency of charging manganese slag up to 20-25% of the blend in reducing the production cost due to reducing the cost of manganese ores. Charging of 20-25% manganese slag reduces the cost of manganese ores and the total production cost by about 13 and 6% respectively, comparing with the conventional technology (without using manganese slag in the blend). 相似文献
17.
18.
为打通转炉炼钢过程锰矿熔融还原技术路径,提高锰的收得率,对锰矿熔融还原过程和提高锰收得率的工艺参数进行了热力学探讨,并在某钢厂200 t转炉上开展了工业试验研究。研究结果表明:高效稳定的铁水“三脱”预处理技术是锰矿熔融还原技术成功的基本前提;通过理论计算,在炉渣中的(MnO)质量分数为5%~10%,终点[C]质量分数控制在0.13%~0.36%时,终点钢液[Mn]质量分数可控制在0.3%以上。工业试验主要通过采用双渣法冶炼操作,在确保前期铁水低磷的条件下尽可能控制少渣量、降低炉渣中氧化铁,从而实现加入锰矿后提高锰收得率;并在现有工艺控制条件下,锰矿加入10 kg·t?1以内时,工业试验可使锰矿还原过程锰收得率超过40%,平均为51.40%;为进一步提高锰收得率,建议严格将锰矿熔融还原渣料总量控制在40~60 kg·t?以内,石灰加入量控制在10~15 kg·t?1以内;研究结果为锰矿熔融还原技术的开发和应用提供重要参考。 相似文献
19.
Silicomanganese is widely used as a complex reducer and an alloying addition in the production of various grades of steel due to its economic and metallurgical advantages. It is also used as a semi‐product in the manufacture of medium‐ and low‐carbon ferromanganese and metallic manganese. Manganese‐rich slag, resulting from high carbon ferromanganese production, has the advantages of high manganese content, high Mn/Fe ratio, low excess oxygen, low phosphorus content, low fine content and low cost. Such slag seems to be very attractive to use as raw materials for the production of silicomanganese alloys. In the present study, experimental heats were designed and carried out to optimise the factors affecting the production process of silicomanganese using manganese rich slag in the charge. The results of pilot plant experimental heats showed that the optimum metallic yield and recoveries of manganese and silicon are obtained with an initial slag basicity, (CaO + MgO) / (Al2O3), of 1.8 by using dolomite as fluxing material and charging quartzite and fluorspar in percentage of 25% and 4% of the blend, respectively. The results also showed that an amount of 30% of coke in excess of the stoichiometric amount should be added. These results are relative for the specific high Al2O3 ores used. 相似文献
20.
研究了Al2O3、MgO对锰硅合金炉渣冶金物理化学性质的影响,提出选择Al2O3、MgO两种组元含量都比较高渣型的观点。介绍了在大、中型电炉上,应用此渣型提高锰硅合金Mn回收率的生产实践。实践结果表明,普通锰硅合金电炉Mn回收率达85%。 相似文献