改进碎矿工艺 实现多碎少磨

黄沙坪铅锌矿选厂对碎矿工艺、检查筛分筛孔尺寸、Φ1750中碎前预筛筛孔尺寸、中碎排矿口等条件进行调整，实现多碎少磨，技术可靠，能降低成本，提高了经济效益。     

云南某矿山提高矿石处理能力实践

云南某矿山选厂碎矿系统能力偏低，最终碎矿粒度偏大，与球磨机需求不匹配，导致生产组织困难。该矿山为了提高矿石处理能力，经过考察、研讨及试验研究，确定将GP11F圆锥破碎机更换为GP330圆锥破碎机，并对配套的筛分设备进行改进，减少粗碎设备负荷，提高细碎生产效率。改进后，该矿山碎矿效率提升至160～180 t/h,碎矿最终产品粒度-12 mm含量提升至71%,磨矿处理能力稳定提升至2 029 t/d,为降低选矿能耗提供了有力的保障。     

排山楼金矿碎矿技术改造及生产实践

对排山楼空矿碎矿技术改造及生产实践进行了简明的论述，认为对碎矿工艺流程进行挖潜技术改造是现有黄金矿山扩大生产规模、增加黄金产量、提高企业经济效益的最有效途径。     

计算机在碎矿系统中的应用

本文介绍大型选矿厂碎矿系统利用计算机及相应自动化仪表进行集中监控,提高了碎矿系统的台时效率,实现了“多碎少磨”,节能降耗显著。     

降低碎矿粒度研究与改造实践

通过增加中碎前预先筛分，对三十亩地选矿厂碎矿工艺流程进行了有效的技术改造。改造后，碎矿粒度明显降低，取得了显著的经济效益。     

我們是怎样提高磨矿处理量的

我厂通过提高球磨机转速、改革碎矿流程以及合理地调整破碎篩分作业等技术措施,使处理矿量较1957年提高了15％左右。一、提高球磨机转速:将第一段8×3圆锥型球磨机转速由23转/分改为26转/分(相当于临界转速的90％),使球磨机处理矿量提高6％左右,排矿产品中-0.075毫米粒级由0.542吨/米~3时增加为0.751吨/米~3时。二、缩小碎矿最终产品粒度:①合理地调整整碎矿比。考虑到细碎机容易发生事故,主要从粗、中碎方面充分挖掘潛力,以达到粗碎给矿300毫米、破碎最     

关于碎磨矿中的能耗与节能

从破碎比、碎矿与麻矿流程，碎矿与磨矿设备叙述了选厂的耗能与节能的关系。     

可TI545可编程序控制器改造碎矿控制系统

针对德兴铜矿泗洲选矿厂二期碎矿控制系统存在的问题，用可编程序控制器取代原继电器－接触器联锁控制，进行了基于可编程序控制器的碎矿控制系统设计与实现，系统应用后取得良好效果。     

用TI545可编程序控制器改造碎矿控制系统

针对德兴铜矿泅洲选矿厂二期碎矿控制系统存在的问题，用可编程序控制器取代原继电器一接触器联锁控制，进行了基于可编程序控制器的碎矿控制系统设计与实现。系统应用后取得良好效果。     

碎矿流程设计中几个问题的探讨

在科学技术问题上,存在不同的见解,这是科学技术发展过程中正常的现象。开展不同见解之间的自由讨论,分清是非,是找出多快好省的技术方案、发展科学技术、提高技术理论水平的正确态度。本刊“技术问题讨论”一栏就是为此而开辟的、供读者发表不同技术见解、进行自由讨论的园地,欢迎广大读者充分利用,踊跃投稿。当前,在闭路碎矿流程与开路碎矿流程中的短头型圆锥碎矿机的生产能力计算问题上,国内外都存在着较大的分歧,从而使设计上选择设备的数量相差很大,影响了碎矿流程的正确确定和碎矿技术经济指标的提高。金长忠同志在短头型圆锥碎矿机与筛子构成闭路作业时的生产能力计算问题上,提出了当碎矿机的循环比C_g大于100%时,按通过碎矿机总矿量Q_r值的1/2来计算;当碎矿机的循环比C_g等于100%或小于100%时,则按预先筛分的筛上量Q_2值来计算的意见。在开路碎矿流程中,短头型圆锥碎矿机的生产能力的计算问题上,提出了当短头型圆锥碎矿机做为开路碎矿设备时,其生产能力约为规格能力的1.6倍,在计算设备数量时可取1.5倍的数值的意见。此外,在总筛分效率与部分筛分效率的关系和合理确定碎矿机的循环比的问题上,也都提出了白己的意见。希望有关读者参与讨论,以便找出合理的选择设备数量的方案来。     

Books and Monographs Received.

Presents a log of books and monographs received for review. Some of them are, Theories of perception and the concept of structure by F.H. Allport; Family, marriage and parenthood 2nd Ed., edited by H. Becker and Reuben Hill; Language and society by J. Bram; A casebook of counseling by Callis et. al; Text materials in modern education edited by L.J. Cronbach; The nihilism of John Dewey by P.K. Crosser; Statistical methods for the behavioral sciences by A.L. Edwards; Individual development by L.K. Frank; Human dynamics and human relations education by H. Giles; Social organization by S.A. Greer; Laboratory instrumentation in psychology by W.W. Grings; A developmental study of the behavior problems of normal children between twenty-one months and fourteen years by J.W. Macfarlane, L. Allen and M.P. Honzik; Clinical vs. statistical prediction by P.E. Meehl; Language; in relation to a unified theory of the structure of human behavior by K.L. Pike; The worker speaks his mind; on company and union by T.V. Purcell; Insanity, art and culture by F. Reitman; and Social learning and clinical psychology by J.B. Rotter, etc. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

鞍钢360m~2烧结机混合制粒工序研究

针对鞍钢炼铁总厂三烧车间烧结矿质量差问题,对圆盘混合机与圆筒混合机制粒对烧结矿成分稳定性的影响进行了对比分析。结果表明,圆盘混合机的混匀效果比圆筒混合机差是三烧车间烧结矿质量差的直接原因。由圆盘改成圆筒后,烧结矿碱度稳定率提高6.3个百分点,TFe稳定率提高2.94个百分点,Fe O稳定率提高0.95个百分点,烧结固体燃耗降低4 kg/t,烧结矿冶金性能改善,高炉生产稳定顺行、焦比降低。     

Application of Rare Earth Phosphate Fertilizer in Western Area of China

Rare earth phosphate fertilizer (REPF) as base fertilizer (750 kg per hm2) was applied in the western area of China during the "Tenth Five-Year Plan", and the results show as follows: compared with calcium superphosphate (CK), REPF increases crops yields for maize by 17.0%, for rice by 10.5%, for wheat by 24.2%, for potato by 18.5%, for cabbage by 16.3%, for Chinese cabbage by 16.4%, for beet by 6.5%; decreases the diseased plant rate for common smut of maize by 1.0%, for maize stalk rot by 1.2%, for wheat take-all disease by 7.8%, for wheat root rot by 3.2%, for potato blackleg disease by 1.4%, for potato late blight by 6.6%; increases the sugar content of beet by 0.9°S.     

TB6钛合金等温锻后热处理工艺研究

采用等温锻压机对TB6钛合金方棒进行等温锻造,锻造完成后对锻件进行水淬和空冷2种不同方式的冷却,再对水淬的锻件进行时效处理,空冷的锻件进行固溶+时效处理。研究了等温锻后热处理工艺对TB6钛合金组织和力学性能的影响。结果表明,等温锻后水淬,α相尺寸较小,等温锻后空冷,α相尺寸较大;水淬后β基体上无感生α相,空冷后β基体上有感生α相形成;水淬+时效后析出的次生α相比空冷再经固溶+时效后析出的次生α相更加混乱。TB6钛合金经等温锻后水淬+时效处理,其强度和塑性与等温锻后空冷至室温再进行固溶+时效的水平相当,且平面应变断裂韧度更高。     

Reduction characteristics and kinetics of iron oxide by carbon in biomass

The characteristics and kinetics of iron oxide reduction by carbon in biomass composites were studied. Iron oxide can be reduced by biomass very rapidly, and the degree of metallisation and reduction increases with temperature. Iron oxide reduction by carbon in biomass can be divided into two stages: reduction by volatile carbon followed by reduction by non-volatile carbon. The reduction times of the two stages both decrease with increasing temperature. The first reduction is controlled by gas diffusion, whereas the second stage is dominated by carbon gasification.     

Thermo-Calc calculations and studies of the heating process of Fe83Si4B13 alloy

The microstructural changes of Fe_(83)Si_4B_(13) amorphous mother alloy during the heating process were investigated by Laser Scanning Confocal Microscopy( LSCM),and the phase transformation was determined by the Thermo-Calc calculations. The differences in the melting points measured by Differential Scanning Calorimetry( DSC)and LSCM,and those obtained by Thermo-Calc calculations were also discussed. It is found that the melting points measured by DSC and LSCM are relatively similar,whereas the onset and end of the melting temperatures calculated by Thermo-Calc software are higher than those measured by DSC and observed by LSCM.     

强力混合对高比例精矿烧结的影响及机制

通过混合试验、制粒试验以及烧结杯试验研究了强力混合技术对高比例精矿烧结的影响,包括混合效果、制粒效果以及烧结指标,阐明了强力混合影响高比例精矿烧结的作用机制.结果表明,与圆筒混合机相比,采用强力混合机时混合料中水分、生石灰和核颗粒分布更为均匀;制粒效果得到改善,制粒小球中粒度大于3 mm含量提高了8.25％(质量分数)...     

汽车用高强车轮钢LQ540的研制

以汽车用高强车轮钢LQ540为研究对象,选择Gleeble-3800热模拟试验机测定了LQ540动态CCT曲线,采用金相组织观察、TEM及力学性能测试等手段分析了实验室条件下所试制的试验钢组织和性能。根据优化的试验结果,进行了高强车轮钢LQ540的工业试制。结果表明,试制样品的显微组织为铁素体加珠光体及少量的贝氏体,屈服强度大于450 MPa,抗拉强度大于540 MPa,延伸率在23%以上。产品应用于实际车轮冲压效果良好,疲劳性能达到62万次以上。     

电热法生产铸造用共晶铝硅合金的能耗分析

介绍了电热法生产铸造用铝硅合金的工艺流程,同时对兑掺法和电热法生产铸造用铝硅合金的能耗进行了分析,结果表明：电热法生产共晶铝硅合金与兑掺法相比可节能5%以上,成本可降低700元以上。     

法国行政法治原则及其借鉴价值

行政法治原则是法治原则在行政管理领域的具体化.法国是行政法的母国,一直保留着自身独特的宪政和行政法治模式,在社会生活中表现出强大的生机和活力.探讨了法国行政法治原则的宪法基础以及与行政法治的关系,并分析了法国行政法治原则对当代中国行政法治的借鉴价值.