750m^3高炉无料钟炉顶溜槽传动系统

莱芜钢铁总厂７５０ｍ３高炉双罐并列式无料钟炉顶旋转溜槽行星传动系统使溜槽既可绕高炉中心线会圆周运动，又能倾动，实现了炉喉的理想布料。无料钟炉顶使炉顶压力达到０．１５ＭＰａ，单座高炉利用系数达２．４ｔ／ｍ３·ｄ，并可充分利用煤气，化学能、热能、简化炉顶结构，节省投资。     

安装在干燥机出料端的筛分装置

本实用新型涉及一种安装在干燥机出料端的筛分装置，它包括筛分网、法兰盘和连接板，其特征是筛分网为外筛孔组成的无底筒状物，法兰盘开有内筛孔和中心孔，外筛孔的可通过尺寸小于扬料板的宽度，内筛孔的可通过尺寸小于扬料板的宽度，中心孔的可通过尺寸大于扬料板的宽度，筛分网的一端通过法兰盘固定在干燥机的出料端口，筛分网的另一端在运输皮带的垂直投影面以外，连接板与筛分网及干燥机出料端外壁固定联结。由于本实用新型结构简单、工作稳定，能有效防止扬料板落到运输皮带上，因此，既降低了生产成本，又提高了生产效率。     

浅谈高炉休风料

在高炉４－１６小时的计划休风中，休风料中焦炭的增量与休风时间呈线性关系，其增量计算式可通过热平衡推导出来。此法所确定的高炉休风料能使复风后高炉生产迅速转入正常。     

浅谈高炉休风料

在高炉４～１６ｈ的计划满炉料休风料中，焦炭的增加量与休风时间呈线性关系，其增加量可通过热平衡计算得出。用此方法所确定的高炉休风料能使高炉复风后迅速转入正常。     

大直径硬质合金圆盘切刀烧结坯的变形控制

为了解决直径大、厚度小硬质合金圆盘切刀烧结坯椭圆变形和弯曲变形的问题，本研究探讨了压制料盒设计、石墨舟皿槽型设计、烧结涂料选择和涂刷方式等因素对烧结坯变形的影响。结果表明，缩小料盒存料空间、增加进料面积、减小出料口面积的料盒设计能有效改善制粒料下料不均现象，进而改善产品的椭圆变形，外径椭圆变形值可降至0.3mm，内径椭圆变形值可降至0.4mm；通过石墨舟皿的槽型设计，增强烧结过程中烧结坯表面与炉内气氛的接触，有利于防止烧结坯的弯曲变形；采用惰性氧化物取代含碳有机物涂料对石墨烧结舟皿进行防黏处理，可使烧结坯弯曲变形值降至0.1 mm；对石墨舟皿进行双面涂刷对烧结坯弯曲变形控制的效果优于单面涂刷。     

稀土元素对低温铝基钎料性能影响的研究

本文研究了稀土元素Ｙ、Ｃｅ对Ａｌ－Ｚｎ－Ｃｕ－Ｓｉ系列低温铝基钎料的熔化温度、钎焊工艺性、电极电位及其接头的机械性能及抗腐蚀性能的影响。结果表明：少量Ｙ、Ｃｅ的加入，对钎料的熔化温度影响不大，能提高钎料的钎焊工艺性；稀土Ｙ、Ｃｅ能细化晶粒，改变组织的分布状态，不改变钎料的电极电位，但却提高了钎焊接头的机械性能和抗腐蚀性。     

提高熟料窑台时产能的途径

针对我厂热料窑台时产能低的问题，结合兄弟厂家先进经验，分析我厂热料窑操作、配料原因，通过实施高铝硅比烧结、增加扬料板数量和窑尾立烟道喷料，应用畅焰操作法，可提高我厂热料窑台时产能．     

厚料层操作条件下煤结矿FeO含量的降低

目前正在吴厂１号烧结机进行原料层料层操作（料怪超过７００ｍｍ）。在开始这种厚料层操作之前，曾用不同料层厚度进行了烧结杯的烧结试验，以探索料层厚度对烧结过程的影响，下面是烧结杯试验所获得的结果，提高料层的厚度可中料层上部成品率，但是在普通料层的底部，可获得最大的成品率，从烧结饼宏观观察可知，生产率的降低是底层热量的过剩引起的，因此，在进行厚料层烧吉时，需要减少烧结热量（降低烧结矿的ＦｅＯ含量），这种     

高炉开炉初期料柱的特征

开炉初期料柱具有整体温度低，上、下部料柱温差大；相当长时间内不出现软熔带；料柱整体负荷轻，下部透液性好，上部透气性差；开炉料水分高时，上部料柱产生过湿层等特征。采用动态装料、提高入炉料质量、降低开炉料水分、一次装料至规定料线、控制开炉初期风量等方法可改善料柱透气性，预防过湿层出现。     

用KLP添加剂强化烧结生产的工业性试验

该试验表明，烧结配加ＫＬＰ冶金添加剂，用量在１．４‰时，可改善混和料制粒效果，促进混合料粒度均匀，对改善混和料料层透所了性，缩短烧时间有利，可提高烧结矿产量１０％，而转鼓指数保持不变。     

原矿焙烧工艺的技术改造

中国第一座采用原矿焙烧工艺的紫木凼金矿黄金冶炼厂经过7年的运行,基本达到了设计生产能力。但由于设备老化,焙烧效果不好,金浸出指标下滑,再加上近年来原矿金品位下降,致使企业经济效益降低。通过对沸腾焙烧炉、气一气换热器、旋风收尘器、炉前风机和尾排风机、尾气吸收系统的改造,使金回收率大幅提高,各项指标得以改善,从而使该工艺更趋完善。     

河北某金银多金属原生产矿选矿试验研究

河北某矿石为含金银的多金属原生矿石,矿石成分复杂,金银与硫化物以及硫化物之间共生关系密切,分选难度较大。通过多种选别流程的对比,应用碱预处理氰化法提取金银,氰化尾渣多金属浮选分离的选冶联合流程取得了较好的指标。碱预处理和氰化物低浓度浸出,使金的浸出率由61．78％提高到91．74％,浮选过程采用组合抑制剂,有效实现了铜铅与锌硫的分离,并达到了多金属综合回收的目的。     

黄金冶炼废水综合处理工艺研究及应用

针对紫金矿业集团股份有限公司黄金冶炼废水的综合处理工艺进行了研究,其试验结果表明,采用分流分质、物化法与膜法相结合的工艺处理黄金冶炼废水,既可实现废水达标处理的目的,又可综合回收废水中的金和铜,并取得了良好的经济效益和环境效益。该处理工艺具有一定的推广意义和应用前景。     

青海某铁帽型金银矿石氰化浸出试验研究

为开发利用铁帽型金银矿产资源,对青海某铁帽型金银矿石进行了氰化法浸出试验研究,考察了磨矿细度、浸出时间、矿浆浓度、NaCN用量、石灰用量和醋酸铅用量等因素对金银浸出率的影响,进而确定了最佳浸出条件。试验结果表明：在磨矿细度-0.074 mm占98.23%,矿浆浓度33.33%,石灰用量10 kg/t,氰化钠用量2.5 kg/t,醋酸铅用量100 g/t以及浸出时间24 h条件下,该矿石中金、银浸出率分别达到93%和83%以上。该研究成果为青海某铁帽型金银矿的开发利用提供了技术支撑,并对同类型矿石资源的高效开发具有重要的借鉴意义。     

特高银金矿氰化实践及其特点

遂昌金矿属于含特高银金矿,其金银比平均为1:20,高达1:64.82。在建成精矿氰化工艺以后,由于其矿石性质的特殊性,生产实践中对流程和操作条件进行了多次凋整,逐步掌握了特高银金矿的氰化规律及其特点,取得了氰化总回收率金97％以上、银93％以上的好结果,为高银金矿以及银矿的氰化实践提供了经验。     

从多金属硫化矿中提取金银的研究

不宜在现有冶炼厂处理的多金属硫化矿,可以用三氯化铁、硫脲和氯化钠溶液浸出回收其中的金、银、铅和部份锌。本文研究了有关金属在这些过程中的浸提性质,提出了最佳工艺条件。     

Dissolution Chemistry of Gold and Silver in Different Lixiviants

Cyanide has been recognized for a long time as a powerful lixiviant for gold and silver, forming very stable cyano complexes with both metals. While cyanide is very effective in leaching free milling ores, there are certain classes of gold and silver ores (i.e., carbonaceous, pyritic. arsenical, manganiferous, cuperferous) that are considered refractory to conventional cyanidation dissolution. Recently there has been considerable effort directed towards new and improved reagents for leaching these difficult-to-treat ores and concentrates. A large portion of this effort has been devoted to finding alternative lixiviants that might compete with conventional cyanidation. Furthermore, there is a general interest in developing non-toxic environmentally safe substitutes for cyanide.

There are a number of reagents that form stable complexes with gold and silver e.g., thiourea, thiosulfate, halides, malononitrile, acetonitrile and polysulfides. The chemistry of gold and silver dissolution using alternative lixiviants is discussed in this paper. Special emphasis is given to the application of Eh-pH diagrams to interpret the dissolution behavior.     

Hydrometallurgy of precious metals recovery

The hydrometallurgical process for the treatment of gold and silver ores remained unchanged for the first 70 years of this century, and consisted essentially of leaching in cyanide solution followed by solid-liquid separation, with the solid residues being washed as efficiently as possible, and the leach liquor being treated by zinc cementation to recover the precious metals. White this process is generally extremely efficient and fairly cheap, it does have limitations in the treatment of low-grade ores and certain complex ore types. For example, ores with a high content of clay or other soft, fine minerals are usually difficult to filter, and losses of soluble gold or silver in the residues can be unacceptably high. In other situations, where the precious metal host rock contains high concentrations of sulphides such as pyrite or arsenopyrite, for example, or base-metal oxides or carbonates, the traditional process often suffers from poor gold recovery (due to encapsulation of the precious metals in the sulphides) or high cyanide consumption, or both of these. Whereas these occurrences were fairly rare (or were avoided!) in the first half of this century, they are now assuming great importance, and each year a higher percentage of world gold production derives from sources such as these.A number of new hydrometallurgical processes have been developed and implemented in the gold industry in the last 20 years, and these have transformed gold processing into a chemical “high tech” industry, and have allowed increasingly complex ore types and progressively lower grades of ore to be treated economically. As a result, in a period when gold production might have been expected to decline, world-wide production has almost doubled over the two decades.This paper describes the traditional cyanidation and zinc cementation processes, but focuses on the new developments in the industry. In particular, new leaching technologies such as heap leaching for low-grade ores and pressure leaching for refractory sulphide ores are discussed, as well as the carbon-in-pulp and carbon-in-leach processes that have effectively replaced filtration and countercurrent decantation on almost every gold plant built since 1980. Some emerging technologies such as bacterial leaching and resin-in-pulp are also discussed briefly.     

青海省果洛龙洼金矿床矿石及矿物特征研究

青海果洛龙洼金矿是东昆南成矿带上新发现的一韧性剪切带型金矿床，具中-大型远景规模。该矿床矿石属少硫化物型金矿石，矿石物质成分简单，金属矿物含量约3 ％，以黄铁矿、褐铁矿为主，脉石矿物主要为石英。金矿物有银金矿和自然金，在矿石中分布很不均匀，以裂隙金和粒间金为主要赋存形式。