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了解一个因素对过程优化和成本控制的影响是相当重要的。应该优化重要的因素,而不重要的因素则可以将其设定在成本最低的水平上。本研究的目的是采用化能无机自养细菌的混合培养物(Acidithiobacillus ferrooxidans、Acidithio-bacillus caldus和Leptospirillum ferrooxidans)来考查影响红土镍矿溶解的因素。应用因素统计实验设计2ш5-2来评估每个因素的显著性和他们之间的交互作用,镍的溶解率作为测量的响应。本试验研究的因素包括矿浆浓度、颗粒粒径、pH、细菌接种量和基质类型。试验结果表明,接种量在统计学上是不重要的因素,而其他的因素是重要因素。在所研究的范围内,除矿浆浓度和基质类型之外,不同因素之间的交互作用在统计学上是不重要的。结果还表明,在低pH和低矿浆浓度下镍的回收率最大。在所研究的范围内,粒径小于38μm的颗粒对镍的回收有负面影响。硫基质比黄铁矿基质要好。
It is important to understand the impact of a factor on process optimization and cost control. Important factors should be optimized, while less important factors can be set at the lowest cost level. The purpose of this study was to examine the factors influencing the dissolution of lateritic nickel ore using Acidithiobacillus ferrooxidans, Acidithio-bacillus caldus and Leptospirillum ferrooxidans. Applied Factor Statistics Experimental Design 2-a5-2 was used to assess the significance of each factor and the interaction between them, and the nickel dissolution rate as a measure of response. Factors studied in this study include pulp concentration, particle size, pH, bacterial inoculum, and substrate type. Test results show that inoculum size is statistically insignificant, while other factors are important. Within the scope of the study, the interaction between the different factors is statistically insignificant, in addition to pulp concentration and matrix type. The results also show that nickel recovery is highest at low pH and low pulp concentrations. Within the scope of the study, particles with a particle size of less than 38 μm have a negative effect on nickel recovery. Sulfur matrix is better than pyrite matrix.