钢渣溶出过程中浸出液pH值变化规律研究

Variation of pH value of leaching solution during steel slag dissolution

为了掌握钢渣堆存时对环境造成的影响,本文研究了钢渣在溶出过程中浸出液pH值的变化规律,分析了钢渣碱度、氧化镁质量分数、水温、钢渣粒度、液固比等因素对钢渣浸出液pH值的影响规律,并与现场钢渣进行了对比试验。结果表明:钢渣溶出后浸出液pH值在10~12,随时间呈先升高后降低的趋势;提高钢渣碱度及氧化镁质量分数均使浸出液的pH值升高;水温的升高、钢渣粒度和液固比的增大可降低浸出液的pH值。

This study explored the change law changing pattern of pH value of steel slag leaching solution in the process of steel slag dissolution with an aim to study the influence of steel slag on environment.Specifically,it analyzed the influence law of steel slag basicity,magnesium oxide content,water temperature,steel slag particle size,liquid-solid ratio and other factors on pH value of steel slag leaching solution and conducted a comparative test with on-site steel slag.Results show that the pH value of the leaching solution after steel slag dissolution is in the range of 10~12,and with the change of time,the pH value first increases and then decreases.Increasing the basicity of steel slag and the content of magnesium oxide can increase the pH value of the leaching solution.The increase of water temperature,steel slag size and liquid-solid ratio can reduce the pH value of the leaching solution.