攀枝花钒钛磁铁矿粗细分选工艺试验研究

介绍了攀枝花钒钛磁铁矿粗细分选的小型试验及扩大连选试验情况,试验结果表明,在保证最终精矿品位和全铁回收率的前提下,采用粗细分选、粗粒抛尾的新工艺流程,可以大大提高球磨机的处理能力,为攀枝花密地选矿厂的工艺流程改造提供了一条可供选择的新途径。     

重钢太和铁矿选矿工艺设计优化

通过对重钢太和钒钛磁铁矿的矿石性质特点及选矿试验结果的分析,确定了太和铁矿630万t/a选矿厂合理的选矿工艺流程。并对流程结构、工艺设计特点等进行了综合论述。     

Graphene vanadic acid (GVA) as a novel heterogeneous catalyst for highly selective benzene hydroxylation under mild conditions

In the present study, Graphene Vanadic Acid (GVA) is introduced as a novel catalyst for high-efficiency hydroxylation of benzene to phenol using hydrogen peroxide at ambient conditions. Graphene oxide as a famous carbon support has converted to a high-performance catalyst through the functionalization using vanadium oxytrichloride (VOCl₃). This new carbon compound is regarded as the efficient catalyst due to the prominent advantages such as high-recativity and reusability, facile preparation, active Lewis and Bronsted acid sites, high potential for development of various oxidation reactions, and high thermal, chemical, and physical stability due to the regular carbon structure. GVA progressed the benzene oxidation toward the phenol formation as a useful raw material. Cause of the considerable reactivity of the synthesized catalyst, a minimum amount of hydrogen peroxide was required and the benzene oxidation carried out using an equimolar ratio of benzene/H₂O₂, and phenol obtained with a remarkable yield (28.2%) as the sole product.     

钒钛磁铁矿Bond球磨功指数测定试验研究

以-3.30、-1.70、-0.83、-0.425mm四种粒级的钒钛磁铁矿为试验原料,开展Bond球磨功指数测定试验,获得了-0.15、-0.096、-0.075、-0.058mm粒级产品下的Bond球磨功指数,建立了给料粒级、产物粒级与功指数之间的数学模型,同时将邦德功指数试验转换为工业试验。研究结果表明,功指数与给料粒度、产物粒度成反比例关系;功指数与给料粒度呈指数函数关系、与控制筛孔尺寸呈二次函数关系;每转新生成产物G_(bp)随着控制筛孔尺寸的减小而减小。工业换算结果显示,产物粒度越细,磨矿处理量越小;实际单位功耗与计算单位功耗均随着产物粒度的减小而增大。研究结果为钒钛磁铁矿不同磨矿粒度下磨机计算与选择提供一定的指导意义。     

高碱度下钒钛磁铁精矿烧结制度探讨

在高碱度条件下,运用正交组合分析手段,对钒钛磁铁精矿的烧结工艺进行烧结实验研究分析。在攀钢现有的生产条件下,碱度2.4、水分7.0%、料层550 mm及配碳量2.2%的参数组合为最佳烧结参数组合。     

浅析钒钛磁铁矿的选矿方法

阐述了钒钛磁铁矿的工艺矿物学性质、有用矿物的选矿方法。通过百草钒钛磁铁矿的选矿研究,说明钒钛磁铁矿的选矿工艺、尤其钛铁矿的浮选工艺是可行的,产品质量较高,并且对伴生元素也达到了部分综合利用的效果。     

攀钢钒钛磁铁矿烧结熔剂分加试验

在燃料分加的基础上进行二次熔剂加入的烧结试验研究，探索了强化钒钛磁铁矿烧结技术。研究结果表明：在攀钢钒钛磁铁矿烧结中无论采取何种熔剂分加方式，都有利于改善烧结矿强度指标，但熔剂分加方式中生石灰分加对烧结矿强度的改善优于石灰石，且采取生石灰分加比例50％最佳。     

2×35m2环型烧结工艺设计

介绍了2×35m2烧结工程工艺设计特点及主要设备选型.