生物氧化预处理中进气量实时预测数学模型研究

精准预测生物氧化预处理中的进气量对提高黄金提取率和节能降耗具有重要意义。以气体管流连续性方程和运动方程为控制方程，采用Preissmann隐格式法作为差分方法。同时，根据集合卡尔曼滤波(Ensemble Kalman filter，EnKF)算法原理，构造进气量、压强的状态空间模型。结果表明，基于气体管流控制方程建立的进气量模型预测结果与实际进气量观测值具有较好的一致性；与传统静态预测方法相比，EnKF同化方法引入实时观测值和模型参数的更新，有效提高了进气量的预测精度，其平均绝对误差、平均相对误差和均方根误差有明显的降低。可见，基于气体管流控制方程建立的预测模型结合EnKF同化方法是提高生物氧化槽进气量预测精度的有效手段。     

生物氧化—氰化炭浸提金工艺的优化改造

对三和金业生物氧化—氰化炭浸提金工艺进行了优化改造。通过优化生物氧化作业参数,使其处理能力提高了42.49 t/d;增设氧化洗涤液二段沉淀回收高品位含金微细氧化渣、采用二段沉淀—压滤工艺回收粉炭、增设摇床重选工艺回收氰渣中的金等,金的总回收率提高了0.46%。企业年增产黄金884.4 kg,取得了显著的经济效益。     

利用埕东油田西区采油污水配制聚合物溶液研究

为了提高埕东油田西区采油污水配制聚合物溶液的粘度,根据该区污水配制聚合物溶液粘度降低的影响因素和污水的特点,提出了首先采用生物接触氧化工艺去除污水中还原态硫化物,然后采用超滤反渗透工艺降低金属离子的质量浓度,形成了一套采油污水生物接触氧化与超滤反渗透处理集成工艺.通过工艺处理,可以有效降低污水中显著影响聚合物溶液粘度的因素——物质的质量浓度,将污水中还原性硫化物的质量浓度由6mg/L降低为0 mg/L,钠离子的质量浓度由3 541 mg/L降低为248mg/L,镁离子的质量浓度由120 mg/L降低为0 mg/L,用处理后的污水配制的聚合物溶液的粘度达到35 mPa.B,粘度保持率达70％以上,达到现场聚合物驱的生产要求.     

代森锰锌高浓度有机废水的治理实践

江苏某化工厂将污染治理和资源综合利用作为一个整体考虑,采用“化学沉降除锰-汽提（吹脱）脱氨-A／O生物氧化处理”的综合治理工艺,从源头对代森锰锌高浓度有机废水进行预处理,再与全厂综合污水一并进行生化处理,出水各项指标均达到国家污水综合排放标准（GB8978—1996）一级标准,并通过副产品的回收降低了运行成本,取得了较好的经济效益．     

XPS characteristics of sulfur of bio-oxidized arsenic-bearing gold concentrate and changes of surface nature of bio-oxidation residue

During bio-oxidation of sulfides, the chemical state change of sulfur is a complex and key factor. It is not only an indicator of the extent and intensity of the bio-oxidation, but also controls the property of bio-leaching medium and the period of oxidation. The chemical state of sulfur in sulfides oxidized by leaching bacteria was studied with XPS. Sulfide minerals in the arsenic-bearing gold concentrate consist of pyrite, arsenopyrite, chalcopyrite, galena, sphalerite and so on. In order to probe the pattern of the chemical state change of sulfur in the bio-oxidation residue of arsenic-bearing gold concentrate, the structure of the grains, and the surface nature of the residue, XPS test was carried out through different sputtering duration. The study of XPS clearly shows that: sulfides is progressively oxidized from the surface of minerals to the core by leaching bacteria; the chemical valence of sulfur changes from S^2- or [S2]^2- to [SO4]^2- ; sulfur in the core is in a reduction state, S^2- or [S2]^2- , but exists in an oxidation state S^6 on the surface; due to the chemical state change of sulfur, mineral phase of the bio-oxidation residue is also changed(sulfides inside, while sulfates outside); the layered structure is found in the grains of the bio-oxidation residue.     

应用氧化亚铁硫杆菌去除湿法炼锌浸出液中铁的研究

应用氧化亚铁硫杆菌的氧化作用氧化湿法炼锌浸出液中的Fe     

生物提金氧化液中铁的选择性沉淀

以生物提金氧化液为研究对象,采用磷酸氢二铵（（NH4）2HPO4）作为沉淀剂,研究了pH值、温度、加料方式、（NH4）2HPO4浓度和沉淀反应时间对生物提金氧化液中铁的选择性沉淀的影响。采用同时流加生物提金氧化液和0.2 g/mL（NH4）2HPO4溶液的方式,控制（NH4）2HPO4流速将沉淀体系的pH值调节为2.0,在60 ℃条件下搅拌反应2.5 h,铁沉淀率达到95.2%,砷存留率为93.6%,XRD图谱证实了铁沉淀主要是磷酸铁（FePO4）和三聚磷酸二氢铁（FeH2P3O10）,实现了生物提金氧化液中铁的选择性沉淀,为从生物提金氧化液中综合回收铁、砷等有价成分提供了理论指导。     

生物氧化反应器的设计与应用

生物氧化是难处理金矿石预处理工艺技术之一。介绍了国内外生物氧化技术现状及特点,详述了CGACB型生物氧化反应器的配置、壳体、搅拌系统、鼓风供气系统及换热系统、消泡系统等基本结构与设计。应用实践表明：CGACB型生物氧化反应器结构简单,安装方便,不仅搅拌均匀、温度扩散和气体弥散效果好,而且能耗小。     

Acidophilic bioleaching: A Review on the Process and Effect of Organic–inorganic Reagents and Materials on its Efficiency

Bio-hydrometallurgical applications have been receiving more attention globally for processing of several metal bearing wastes. Developments in bioleaching enable this technique to be utilized as an alternative process for extraction of metals (ex-copper, gold, etc.) from complex ores or even concentrates, consequently solving several environmental issues. Organic and inorganic reagents or additives used during the process have been seen to affect the leaching efficiency of microbes for metal dissolution. The present review discusses the influence of certain organic–inorganic reagents and other materials or additives on the growth, oxidation activity, and bioleaching efficiency of acidophiles on metal dissolution.