加药方式对铜萃余液中和处理的影响

本文验证一段石灰中和工艺，通过调整加药方式、药剂混配、用水类型、加药次数等方式对铜萃余液的pH值的影响，初步对各种中和工艺下的中和渣产量及药剂成本进行分析。结果表明，湿法加药方式比干法的加药方法对铜萃余液的中和效果更好。与现有中和工艺比较，采用石灰乳分两段中和工艺具有药剂成本低和时间短特点，而石灰石-石灰两段中和工艺属于石灰石药剂耗量易控制，理论渣量较小，综合药剂成本较低。 

Effcet of Adding Methods on Neutralization Process for Copper Raffinate

In this paper, one-step neutralization process using lime slurry stimulated in the on-site process was conducted as a reference. The adding method of reagent, mixing of reagents, the type of water, and times of adding reagent on the pH value of copper raffinate were investigated. Moreover, the production of neutral slag and cost evaluation of reagents under the condition of various neutralization processes were initially predicted. The test results showed that the wet addition method has better effect than that of the dry one in the neutral performance on the copper raffinate. Compared with one-step neutralization process, the two-step neutralization process using lime slurry has lower cost and shorter reaction time. While neutralization using limestone is used as the first step and the second step using lime slurry, the agent consumption of limestone is easy to control, the amount of slag is the least and the cost of the total reagents is the lowest one.