首钢大石河铁矿尾矿综合利用的研究

针对首钢大石河铁矿尾矿中含有少量强磁性铁矿物的实际情况和储量巨大的特点,研究从旧尾矿中回收磁性铁精矿的工艺流程。试验结果表明,在尾矿品位11.50%的情况下,采用预先磁选、两段磨矿、多次磁选以及精矿脱泥精选试验手段,可获得含铁品位67.32%,回收率18.91%的分选指标。在此基础上,进行了建筑砂筛出试验以及剩余尾矿砂填海造地的探讨。     

基于深度还原的某稀土尾矿选铁试验

将某稀土尾矿磁选预抛尾后进行了深度还原-弱磁选工艺技术条件研究，并对深度还原产物和磁选铁粉进行了XRD分析。结果表明，试样适宜的深度还原条件为褐煤用量占试样与褐煤总质量的10%、还原温度为1 200 ℃、还原时间为60 min，还原产物磨矿细度为-74 μm 85%，弱磁选磁场强度为118 kA/m，最终获得了铁品位为91.00%、还原产物弱磁选作业回收率为90.83%、铁综合回收率达78.20%的磁选铁粉；深度还原使还原对象中的复杂铁矿物大都还原成了单质铁，还原产物具有较好的磨矿-弱磁选效果。     

Selective copolymerization of carbon dioxide with propylene oxide catalyzed by a nanolamellar double metal cyanide complex catalyst at low polymerization temperatures

Traditional cobalt-zinc double metal cyanide complex [Zn-Co(III)DMCC] catalysts could catalyze the copolymerization of carbon dioxide (CO₂) with propylene oxide (PO) to afford poly (propylene carbonate) (PPC) with high productivity. But the molecular weight (MW) of PPC and the polycarbonate selectivity were not satisfied. In this work, by using a nanolamellar Zn-Co(III) DMCC catalyst, the CO₂-PO copolymerization was successfully performed to yield PPC with high molecular weight (M_n: 36.5 kg/mol) and high molar fraction of CO₂ in the copolymer (FCO₂: 74.2%) at low polymerization temperatures (40∼80 °C). Improved selectivity (FCO₂: 72.6%) and productivity of the catalyst (6050 g polymer/g Zn) could be achieved at 60 °C within 10 h. The influences of water content on CO₂-PO copolymerization were quantitatively investigated for the first time. It was proposed that trace water in the reaction system not only acted as an efficient chain transfer agent, which decreased MW of the resultant copolymer, but also strongly interacted with zinc site of the catalyst, which led to low productivity of PPC and more amounts of cyclic propylene carbonate (cPC). These conclusions were also supported by the apparent kinetics of CO₂-PO copolymerization. ESI-MS results showed that all polymers have two end alkylhydroxyl groups. It was thus proposed that the alkylhydroxyl groups came from the initiation reaction of Zn-OH in the catalyst and the chain transfer reaction by H₂O. The proposed mechanism of chain initiation, propagation and chain transfer reaction were proved by the experimental results.     

老尾矿收金工程含氰尾矿水治理方案的优化确定

根据矿山生产和技改工程的实际情况，通过进行技术分析与论证，优化确定了含氰尾矿水采用INCO法的治理方案，以废治废，不仅降低了治理投资和运行费用，而且还可以改善对SO2废气的吸收效果，具有较明显的社会效益和经济效益。     

多相催化氧化法处理酚氰废水的研究

以γ-Al2O3为载体，采用浸渍法制备了CuO，MnO2及MnO2/K2O等3种负载型催化剂，以臭氧为氧化剂，采用多相催化氧化法，处理煤制气厂和焦化厂的含酚氰废水，结果表明：这3种催化剂能显著地提高酚和氰的去除速率和去除率，其中MnO2/K2O催化剂对含酚300mg/L，含氰50mg/L的酚氰废水的氧化速度提高了3～5倍，酚和氰的去除率大于90%，COD去除率大于80%。     

盐酥花生生产技术研究

以花生仁为原料，经脱膜、油炸、调味等一系列工艺精制而成盐酥花生。结果表明：可采用干式多滚轮摩擦脱膜或湿法脱膜，最佳条件为油炸温度１５０～１５２℃，油炸时间５．５ｍｉｎ，香盐末添加量为１．４％、香甜油添加量为１．５％。     

尾矿砂力学特性的试验研究

系统地研究尾矿砂的物理及渗透、压缩与抗剪等方面的特性，探讨了尾矿砂在高压下的压缩及张皮特性，并按ε－ｖ模型计算出所需的参数，以供坝体稳定和变形验算．     

吉林镍业公司尾矿库复垦治理技术初探

矿山尾矿库复垦难度比较大,近年来吉林镍业公司进行了多次试验和探索,通过分析尾矿库影响植物生长的因素,尾矿库植被生长况评价及生物学特性分析,借鉴我国在防护林领域防风治沙的成功经验,提出了生物措施与工程措施协同进行的治理建议,并针对吉林镍业公司尾矿库的特点,提出了“追沙治沙,挡沙绿化”的治理方案。     

长坡选矿厂生产工艺技术改造实践

针对长坡选矿厂所处理矿石品位低、粒度细且部分呈浸染状分布、原有前面重选单室跳汰机处理能力小、粗粒尾矿丢废率低、丢尾金属品位较高且硫化矿部分氧化的情况,采取更换跳汰机、取消枱浮系统、完善矿浆浓缩设施等改造措施,不仅降低了选矿成本,而且锡、铅锑、锌的回收率分别提高了3.07、4.84、6.12个百分点.     

从香花岭尾矿库中回收锡石的研究与生产实践

在对尾矿性质研究基础之上,进行了尾矿脱硫及锡石富集试验,发现从尾矿中浮选合格的铅锌混合精矿或者锡石精矿均存在较大难度,但采用浮选方法首先脱除尾矿中的含硫成分,继而采用摇床分选锡石是可行的,在生产实践中获得了合格的锡石精矿.