湿磨干烧生产线料浆脱水工艺的选择

料浆脱水是湿磨干烧的关键工艺，其脱水方法一般有过滤法，喷浆法和混合法三种，其中过滤法包括真空过滤和加压过滤两种，在国外都有应用，国内则大都用前者。南京院在皖维公司1000t/d生产线和白马山厂850t/d生产经上则采用了厢式压滤脱水法，文中就这两种过滤法的过滤工艺特点及其选择进行了分析和探讨。     

提高φ5m×11.5m生料磨产量的措施

针对粘土资源枯竭问题,江苏巨龙水泥集团实施了以粉煤灰和硅石代替粘土的技改工程。但改造后因原料的变更,导致入房物料易磨性变差而影响了φ5m×11.5m生料磨的产质量,并进一步影响察系统的运行。因此该厂在工艺分析的基础上,采取了调整钢球级配、用高铬球替代合金刚球、改造选粉机、加强石灰石二破的管理和减少系统是否是“漏风”等技术措施,效果显著。改造后的生料磨台时产量比调整前提高了12t/h,且节电效果显著。     

胶磷矿双反浮选工艺研究

对湖北某地镁硅含量较高的难选胶磷矿采用阴离子捕收剂反浮镁、阳离子捕收剂反浮硅的双反浮选工艺,取得了磷精矿P2O5品位32.51%、回收率91.23%、MgO含量0.87%、R2O3含量2.37%的良好指标,实现了胶磷矿与白云石、长石等杂质矿物的有效分离.     

(NH4)2SO4-CuSO4-CTMAB-湿法磷酸体系浮选分离碘(I-)的研究

研究了硫酸铵-硫酸铜-十六烷基三甲基溴化铵-湿法磷酸体系浮选碘(I-)的行为及其与常见离子分离的条件。试验表明,在1.0g(NH4)2SO4存在下,体系中硫酸铜和十六烷基三甲基溴化铵(CTMAB)的用量分别为(2.4×10-2mol/L)0.5ml和0.025g,I-与Cu(Ⅱ)形成的CuI沉淀能被CTMAB浮选,而其它非金属离子不被浮选,从而实现碘(I-)与这些离子之间的定量分离。本法对湿法磷酸中微量碘进行了定量浮选分离,结果满意。     

螺旋藻泡载分离法采收的实验室研究

在一种斜臂泡沫分离装置上，较为详细地研究了泡沫塔构造、起泡剂Tween 20浓度、载气流率、pH值和乙醇浓度等因素对螺旋藻泡载采收性能的影响. 结果表明，斜臂泡沫塔可明显改善藻细胞的泡载性能, 当Tween 20浓度为100 mg/L、载气流率为30 L/h及pH=11、乙醇浓度为1%(j)时，泡载采收过程的分离因子R和浓缩倍数a可分别达到5.04~6.52和2.74~4.31.     

CGA560增强助磨剂在水泥粉磨中的应用研究

研究了CGA560增强助磨剂在水泥粉磨中对台时产量和水泥质量的影响。试验结果表明:在磨机状况不改变的条件下,CGA560增强助磨剂的加入可提高磨机产量10%-30%;同时可有效减少过粉磨现象,优化水泥颗粒级配,提高了水泥粉磨细度及比表面积;因而使水泥强度等性能得到了明显改善和提高。     

撞击流-旋转填料床萃取器传质性能研究

以磷酸三丁酯(煤油)-苯酚-水为试验体系，研究了IS—RPB萃取器的传质性能。在研究主要操作参数对萃取级效率影响的基础上，确定了最适宜的操作条件，得到了97％以上萃取级效率。试验结果表明，撞击流-旋转填料床萃取器是一种新型快速高效的萃取设备。     

选磷厂废水电化学处理循环利用

简要介绍磷矿浮选厂废水（尾矿水）进行电化学处理的研究和处理后循环使用的浮选工艺试验以及含固废水电化学处理的理论基础。试验结果表明：经电化学处理后的废水达到工艺用水水质控制指标；反复循环使用于浮选工艺取得满意效果；电化学处理方法是实现工业废水循环利用的有效手段。     

Nanobubble generation and its applications in froth flotation (part Ⅲ): specially designed laboratory scale column flotation of phosphate

Froth flotation is used widely for upgrading raw phosphate. The flotation recovery of coarse phosphate (-1.18+0.425 mm) is much lower than that achieved on the -0.425+0.15 mm size fraction. Enhanced recovery of coarse phosphate particles is of great economic and environmental importance for phosphate industry. In this investigation, four different phosphate samples were aquired, characterized and tested in a specially designed laboratory-scale flotation column. Significant recovery improvement of coarse phosphate flotation was achieved using cavitation-generated nanobubble though its effects differ among the four testing phosphate samples. The laboratory-scale flotation column test results indicate that nanobubble increased P2O5 recovery by up to 10%-30% for a given Acid Insoluble (A.I.) rejection, depending on the characteristic of phosphate samples. The improvement ef-fect of nanobubble on the hard-to-float particles was more significant than that on easy-to-float particles, especially at lower col-lector dosages. Nanobubbles reduced the collector dosage by 1/3 to 1/2. Nanobubbles almost doubled the coarse phosphate flotation rate constant and increased the flotation selectivity index by up to 25%.     

Two-step flotation recovery of iron concentrate from Donganshan carbonaceous iron ore

The flotation of pure and natural carbonaceous iron ore samples in the oleate flotation system was investigated. Starch can depress hematite effectively in a wide pH range, but cannot depress siderite efficiently in neutral conditions. The flotation recovery of pure hematite, siderite, and quartz in the oleate-starch-CaCl₂ system is significantly different when the slurry pH varies from 4 to 12. A novel two-step flotation process was developed for the separation of iron concentrate from Donganshan carbonaceous iron ore through which the siderite concentrate is first recovered and the high quality hematite concentrates with relative high iron recovery can be obtained in the second step flotation. The siderite concentrate may be utilized directly or undergo further concentration steps to increase iron grade.