个旧氧化铜铁矿选矿试验研究
发布时间：2018-10-09 17:12
【摘要】：铜铁矿是我国铜和铁资源的重要来源,随着经济的快速发展,铜和铁的需求不断增加,而易选铜铁矿日渐消耗,难选矿石的开发利用将越来越受到重视。本文以个旧高氧化率高结合率氧化铜铁矿为研究对象,探寻铜和铁的综合回收工艺,具有较重要的理论意义和实用价值。原矿性质研究结果表明,个旧氧化铜铁矿中铜品位为1.93%,铁品位为42.10%,S、P、As等有害元素含量均较低。该矿中的铜矿物主要以游离氧化铜和结合氧化铜的形式存在,分布率分别为38.74%和56.03%;铁矿物以赤褐铁矿为主,其分布率为82.88%;-400目产率为20.45%,矿泥含量高,属于高氧化率高结合率高含泥难选氧化铜铁矿。在矿石性质研究的基础上,进行了探索试验研究,结果表明:强磁选、摇床重选、螺旋溜槽选别、还原焙烧-弱磁选均能提高铁精矿的铁品位,其中强磁选得到的铜和铁回收率相对较高,且流程简单,操作容易,是较合适的选铁方法;由于该矿中铜的氧化率和结合率较高,矿石泥化较为严重,采用单一浮选、磁-浮和重-浮选,铜的回收率均不高;浸出能够较为有效地分离铜和铁,且加温浸出要优于常温浸出,但加温浸出的成本较高,为此进行了常温浸出的条件试验,结果显示:在磨矿细度为-0.074 mm占70.90%、固液比(原矿质量与浸出体系中酸和水的体积之比)为1:2、矿浆中酸浓度为40%、浸出时间为3小时的条件下,可得到铜的浸出率达到80%以上,但铁浸出率也高,铁损失较大,且酸浓度偏高,导致成本较高。采用强磁选铁、铁粗精矿浸出铜的试验方案,原矿磨至-0.074 mm占60.26%,经一粗一扫强磁选后,得到铁品位为51.58%、铜品位为2.16%以及铁回收率为81.74%,铜回收率为74.65%的铁粗精矿;铁粗精矿,在温度为70℃C、固液比1:2.5、矿浆中酸浓度为10%、浸出时间为2小时的条件下采用加温搅拌浸出,铜相对原矿的浸出率为44.53%,浸渣对原矿产率为57.56%,铁品位为53.06%,铁回收率为72.54%,可作为铁精矿。
[Abstract]:Copper and iron ore is an important source of copper and iron resources in China. With the rapid development of economy, the demand for copper and iron is increasing. This paper takes Gejiu copper iron ore with high oxidation rate and high bonding rate as the research object, and explores the comprehensive recovery technology of copper and iron, which has important theoretical significance and practical value. The results show that the copper grade of Gejiu cuprous oxide iron ore is 1.93 and the iron grade is 42.100.The contents of harmful elements such as Schi-Pu as are lower than that in Gejiu copper iron ore. The copper minerals in the ore mainly exist in the form of free copper oxide and bound copper oxide, the distribution rates are 38.74% and 56.03, respectively, and the iron ore is mainly hematite, with a distribution rate of 82.88% -400 mesh and 20.45% of ore mud. It belongs to high oxidation rate, high bonding rate, high mud content, refractory copper oxide iron ore. Based on the study of ore properties, the experimental results show that the iron grade of iron concentrate can be improved by strong magnetic separation, gravity separation in rocker, separation of spiral chute, reduction roasting and weak magnetic separation. The recovery rate of copper and iron from high magnetic separation is relatively high, and the process is simple and the operation is easy, so it is a more suitable method for iron separation. Because of the high oxidation rate and bonding rate of copper in the ore and the serious mudding of ore, the single floatation is adopted. The recovery of copper from magnetic floatation and heavy flotation is not high, and leaching can effectively separate copper and iron, and the leaching at elevated temperature is better than that at room temperature, but the cost of leaching at room temperature is higher, so the condition test of leaching at room temperature is carried out. The results show that when the fineness of grinding is -0.074 mm, the ratio of solid to liquid (the ratio of raw ore quality to the volume of acid and water in leaching system) is 1: 2, the concentration of acid in pulp is 40 and the leaching time is 3 hours, the leaching rate of copper can reach more than 80%. But the iron leaching rate is also high, the iron loss is large, and the acid concentration is on the high side, resulting in higher cost. By using the scheme of high magnetic separation of iron and leaching of copper from iron coarse concentrate, the raw ore was ground to -0.074 mm and occupied 60.26. After one thick and one sweep strong magnetic separation, the iron grade was 51.58, the copper grade was 2.16%, and the iron recovery rate was 81.74%, and the copper recovery rate was 74.65%. When the temperature is 70 鈩，
本文编号：2260123
[Abstract]:Copper and iron ore is an important source of copper and iron resources in China. With the rapid development of economy, the demand for copper and iron is increasing. This paper takes Gejiu copper iron ore with high oxidation rate and high bonding rate as the research object, and explores the comprehensive recovery technology of copper and iron, which has important theoretical significance and practical value. The results show that the copper grade of Gejiu cuprous oxide iron ore is 1.93 and the iron grade is 42.100.The contents of harmful elements such as Schi-Pu as are lower than that in Gejiu copper iron ore. The copper minerals in the ore mainly exist in the form of free copper oxide and bound copper oxide, the distribution rates are 38.74% and 56.03, respectively, and the iron ore is mainly hematite, with a distribution rate of 82.88% -400 mesh and 20.45% of ore mud. It belongs to high oxidation rate, high bonding rate, high mud content, refractory copper oxide iron ore. Based on the study of ore properties, the experimental results show that the iron grade of iron concentrate can be improved by strong magnetic separation, gravity separation in rocker, separation of spiral chute, reduction roasting and weak magnetic separation. The recovery rate of copper and iron from high magnetic separation is relatively high, and the process is simple and the operation is easy, so it is a more suitable method for iron separation. Because of the high oxidation rate and bonding rate of copper in the ore and the serious mudding of ore, the single floatation is adopted. The recovery of copper from magnetic floatation and heavy flotation is not high, and leaching can effectively separate copper and iron, and the leaching at elevated temperature is better than that at room temperature, but the cost of leaching at room temperature is higher, so the condition test of leaching at room temperature is carried out. The results show that when the fineness of grinding is -0.074 mm, the ratio of solid to liquid (the ratio of raw ore quality to the volume of acid and water in leaching system) is 1: 2, the concentration of acid in pulp is 40 and the leaching time is 3 hours, the leaching rate of copper can reach more than 80%. But the iron leaching rate is also high, the iron loss is large, and the acid concentration is on the high side, resulting in higher cost. By using the scheme of high magnetic separation of iron and leaching of copper from iron coarse concentrate, the raw ore was ground to -0.074 mm and occupied 60.26. After one thick and one sweep strong magnetic separation, the iron grade was 51.58, the copper grade was 2.16%, and the iron recovery rate was 81.74%, and the copper recovery rate was 74.65%. When the temperature is 70 鈩，
本文编号：2260123
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