从复杂镍钴物料中浸出镍钴工艺研究

研究了采用硫酸浸出—硫酸化焙烧—水浸出工艺从复杂镍钴物料中浸出镍、钴,考察了物料在预处理过程中加酸与不加酸条件下的浸出效果,以及浸出渣焙烧过程中酸料质量比、催化剂用量、焙烧温度、焙烧时间等对镍、钴浸出率的影响。试验结果表明:经硫酸浸出预处理后的硫化镍钴物料,在酸料质量比0.85∶1、硫酸钠用量为物料质量4%、焙烧温度450℃、焙烧时间120min条件下进行焙烧,然后再用水浸出,镍、钴浸出率分别可达98.08%和98.79%,镍、钴浸出效果较好。     

从难处理脱碳石煤发电物料中强化提取钒

针对石煤脱碳燃烧利用热值发电后的物料,研究了直接浸出钒和焙烧—酸浸钒。根据实验室条件试验、稳定试验及放大试验结果,确定最佳工艺参数为:物料粒度-325目占100%,硫酸用量50%,助浸剂S1用量4%,液固体积质量比2.5∶1,浸出温度90℃,浸出时间7h。直接浸出工艺适用于此类物料,钒浸出率在82%以上,浸出系统无废水、废气外排,残渣经简单处理后可用于生产建材。     

复杂高含铟物料铟浸出工艺研究

某铅冶炼厂的复杂高含铟物料为冶炼的中间产物,此物料采用常规酸浸工艺铟的浸出率较低.针对此问题,本文采用盐酸-硫酸混酸浸出、加压酸浸法、硫酸化焙烧-低酸浸出等3种工艺对此复杂高含铟物料进行了试验,在各试验的较佳工艺条件下,试验结果为:采用盐酸-硫酸混酸浸出工艺,铟的浸出率可以达到75.87％,浸出渣铟含量可以降低至0.3...     

某含铜物料综合回收镍铜工艺研究

对某含铜物料进行常压通氧酸浸研究,考察液固比、加酸量、温度、浸出时间对含铜物料中镍、铜浸出率的影响。结果表明,在常压条件下通过酸浸能够将含铜物料中的铜浸出,镍部分浸出,在下述最佳浸出条件下,铜、镍、铁的浸出率分别为96.65%、7.63%、39.84%:液固比8∶1、温度85℃、加酸量120g/L、时间6h。     

碲化铜物料提取精碲的试验研究

研究了从碲化铜物料中提取精碲的工艺,详细考察了碲浸出过程中氢氧化钠浓度、浸出时液固比、浸出温度和浸出时间对碲浸出率的影响。结果表明,在碲浸出时控制氢氧化钠浓度为120 g/L、浸出温度为80℃、浸出液固比为3∶1、浸出时间3h,碲浸出率可达到70%左右。     

浅析闪锌矿氧压浸出的酸平衡和热平衡

探讨了硫化锌精矿氧压浸出的酸平衡和热平衡,通常情况下硫化锌精矿氧压浸出无法实现酸平衡和热平衡,需要补充硫酸和热量。通过改变浸出氧势,使少部分硫氧化成硫酸根,可以实现硫化锌精矿氧压浸出的酸平衡,并能实现浸出物料自热后还有多余热量产生。     

高锑铋复杂含银物料中有价金属的综合回收

以某厂铜阳极泥处理后得到的高锑铋复杂含银物料为原料,采用甘油的碱溶液浸出的方法,对含银复杂物料中的铜、锑、铋等有价金属的浸出进行较为系统的研究并优化了相关的工艺条件。研究了NaOH浓度、C3H8O3浓度、液固比、反应时间与温度等因素对浸出的影响,在优化条件下浸出时,铜、铋、锑的浸出率分别为96.73%、96.44%、85.91%。     

ISF处理高SiO2低Fe物料的生产实践

高SiO2低Fe物料的投入一度使ISF生产产生较大的波动.针对此类物料入炉后的炉况,分析了烧结块中SiO2和Fe在熔炼过程中的变化,及此类物料对生产的危害,并提出了相应的解决措施.根据实际生产中的实践操作实例可以看出,韶关冶炼厂的经验措施能有效地降低处理这类物料所带来的不利影响.     

高铅含硒物料湿法处理回收硒的工艺研究

对高铅含硒物料进行了湿法处理工艺探讨,根据物料的X射线荧光光谱分析(XRF)、多元素分析及元素硒的物相分析结果,对比考察了不同强化浸出剂的处理效果,并考察了不同浸出因素对强化浸出效果的影响,同时研究了不同还原因素对浸出液中硒还原率的影响,最终确定了合适的处理工艺。结果表明,采用硫酸作为强化浸出剂硒的浸出效果最好;采用硫酸进行强化浸出硒,在液固质量比为1.5∶1.0、温度90℃、浸出2.5 h的最佳条件下,浸出渣中硒品位小于0.5%,硒的浸出率可达96%以上;含硒料液最佳还原条件:温度为70℃、氯离子浓度为0.06 mol·L-1、亚硫酸钠加入理论用量1.2倍,此时还原后液中硒含量小于0.03 mg·L-1,硒还原率高达99.99%,还原获得粗硒中硒含量93%左右,硒的总回收率达到96.7%。该工艺从高铅含硒物料中回收硒,可以简洁有效地处理此类含硒物料。     

氧压浸出物料粒度对工艺影响

目前氧压浸出工艺湿法炼锌是最环保的生产工艺,该工艺淘汰原本湿法炼锌工艺的焙烧工艺,使原矿中的硫元素不在以硫酸形式储存、运输、销售,尤其对于偏远地区及硫酸需耗量小的地区。氧压浸出将原矿中的硫元素转化为单质硫,以单质硫的形式进行储存、运输、销售。大大解决了硫酸滞销带来的储存困难。对高压氧浸出工艺影响其生产工艺主要的因素是物料的粒度,在经济情况良好的情况下,合理的控制物料的粒度,提高物料的浸出率及硫单质综合回收率度有至关重要的影响。     

高炉内炉料运动的数值模拟

通过二维冷态模型和数值模型研究了高炉内的炉料运动规律。研究表明,通常边缘小粒焦和中心焦都能按一定的轨迹运行,不与周围的炉料混杂,说明高炉边缘加入小粒焦能在炉墙处形成一较稳定的隔离层,既可抑制边缘气流、降低炉墙热负荷,又可防止炉墙结厚和结瘤。软熔带附近炉料的流线在考虑矿石软熔收缩的情况下向中心侧移动,对上部块料带的炉料下降速度影响不大,而下部炉料下降速度则有所减小。     

镁离子对低品位硫化镍矿氧化浸出电化学行为的影响

低品位硫化镍矿中含镁硅酸矿物易被酸溶解出Mg^2+而影响其有价金属提取。采用不同氧化浸出体系研究了Mg^2+对硫化镍矿中Ni、Cu、Mg、Fe浸出的影响,利用循环伏安、动电位极化、交流阻抗等方法研究了Mg^2+影响硫化镍矿中硫化矿物氧化溶解电化学行为。结果表明,试验范围内,低品位硫化镍矿中硫化矿物氧化浸出受氧化产物扩散影响控制,含镁矿物被酸溶解释放出Mg^2+进入溶液,游离的Mg^2+受硫化矿物表面负电性离子吸引而吸附在矿石表面,降低矿物表面氧化溶解双电层电荷转移内阻,加速电荷转移过程;另一方面,由于Mg^2+吸附影响,使得硫化镍矿表面氧化产物膜致密生长而显著负影响硫化矿物浸出,致使硫化矿物自腐蚀速率随Mg^2+浓度增加而降低。Mg^2+对含S物种电对间转化不利,与Fe^3+协同影响硫化矿物氧化浸出效率,低Mg^2+浓度促进Fe^3+/Fe^2+循环,而高Mg^2+浓度引起硫化矿物腐蚀产物层致密生长而降低矿物被溶解的速率。硫化镍矿在不同体系氧化浸出时,初始含Mg^2+条件下,Ni、Cu、Fe浸出效率低于无Mg^2+体系。     

A new method for recovering valuable metals from low-grade nickeliferous oxide ores

A new method, the concentrated sulfuric acid acidolysis and water leaching (SAWL) of nickeliferous oxide ores, is proposed and the optimal conditions for recovery of nickel, cobalt and copper from a low-grade Chinese nickeliferous oxide ore are presented. A series of experiments were conducted which examined the effect of acid charge, acid curing temperature and acid curing time. Recoveries of up to 95%, 83% and 95% for Ni, Cu and Co, respectively were obtained with only the sulfuric acid at ambient temperature and atmospheric pressure. Comparing the percolation leaching with agitation leaching showed that percolation leaching was capable of extracting the valuable metals with water. The SAWL method was scaled to three-stages counter-current leaching tests using 1 kg of ore. The results indicate greater than 90% extraction for nickel and cobalt.     

Hypochlorite Pretreatment of a Low Grade Carbonaceous Gold Ore,Role of Oxygen in the Pretreatment Process

Hypochlorite pretreatment of a refractory carbonaceous gold ore showed promise as a method for oxidizing sulfidic and carbonaceous materials prior to conventional cyanide heap leaching. However, previous studies showed hypochlorite consumption is high and gold extraction is proportional to hypochlorite consumption. The high hypochlorite consumption is due to oxygen depletion as the solution percolates through the ore charge. The relation of dissolved oxygen, potential, and pH with the bed height are investigated. The effect of solution application into the ore charge at different elevations on reagent consumption will be discussed.     

加水方式对塔式磨浸机性能的影响

在进行边磨边浸氰化提金工艺的研究过程中发现，往塔式磨浸机里加水的方式对磨矿细度、磨耗、金的边磨边浸率及氰的消耗有重大影响。这是由于塔式磨浸机的工作原理不同于常规卧式球磨机所致。当磨浸机的尺寸、螺旋转速、装球充填率、给矿粒度及日处理量一定后，加水方式就成为影响塔式磨浸机性能的最重要因素。     

高压溶出部分料位测量的改造

本文着重介绍高压溶出料位测量的改造情况及对生产控制的积极意义。     

Anti-swelling mechanism of DMDACC on weathered crust elution-deposited rare earth ore

In order to inhibit the swelling of the clay minerals in the in-situ leaching process of weathered crust elution-deposited rare earth ores (WCE-DREO), diallyl dimethyl ammonium chloride (DMDACC) was introduced as an anti-swelling agent and combined with (NH₄)₂SO₄ as a novel composite leaching agent. It can be found that the novel composite leaching agent exhibits a good anti-swelling performance and leaching capacity of rare earth, and has great potential on the actual exploitation of WCE-DREO. The anti-swelling mechanism of DMDACC was studied by characterization analysis. The results show that DMDACC with positive charges can be adsorbed on the clay particles by the electrostatic attraction and hydrogen bonds, and neutralize the negative charge of the clay particles. The double electrical layers are suppressed and the repulsion force between clay sheets decreases. It causes the clay particles prone to aggregate. Moreover, DMDACC can enter the interlayer and expel out the water molecules in interlayer. The interlayer spacing is decreased and the hydration swelling of the clay particles is weakened. It can provide a theoretical basis for the development of novel anti-swelling agents.     

Nitric acid leaching of polymetallic middlings of concentration

Investigations into the nitric acid leaching of polymetallic middlings with the purpose of the maximal recovery of copper and zinc into the solution are performed. Using methods of mathematical planning of the experiment, the optimal process parameters are determined: ratio L : S = 5, the consumption of nitric acid is 80 cm³ per 20 g of the charge, and the process duration is 120 min.     

布袋除尘器滤布后处理技术研究

布袋除尘器处理石灰石性寺时，存在“糊袋”、“板结”问题，本文对其滤料后处理技术及其除尘性能的影响进行了研究。     

涟钢计算机机房集中监控系统的设计

针对涟钢机房比较分散的情况，设计了计算机机房集中监控系统，阐述了该系统的结构、目标及其软硬件设计。