火区下矿石回采方法试验研究

介绍一种火区下采矿的方法。根据易燃矿石的性质,选配出适用的阻化剂──石灰,将其制成阻化液泵入火区灭火阵温,然后用铺设钢筋混凝土假底的下向进路式水砂充填法采矿。这种方法安全、经济,有重大的推广价值。     

新型抑制剂对黄铜矿与方铅矿浮选分离的影响及其机理研究

针对硫化铜铅混合精矿难分离,剧毒抑制剂应用广泛的现状,研发了新型无毒抑制剂YZJ(亚硫酸钠+硅酸钠+CMC)。通过单矿物浮选试验对混浮-脱药-抑制分离的工艺,采用丁基黄药为混合浮选的捕收剂,Na2S为脱药剂,YZJ为抑制剂,Z200为分离的捕收剂对铜铅分离作业的浮选进行了试验研究。并通过红外光谱分析、吸附量测定以及电化学测试,考察了黄铜矿和方铅矿与不同药剂的作用机理。结果表明,Z200对黄铜矿具有良好的选择性,可以作为黄铜矿和方铅矿分离流程的捕收剂使用,新型抑制剂能够在铜铅分离中有效地抑制方铅矿,能够高效实现铜铅分离。     

聚天冬氨酸阻垢性能的研究

以L－天冬氨酸为原料合成了聚天冬氨酸,采用静态阻垢评定法,锌试剂分光光度法和测定透光率等方法对聚天冬氨酸进行了阻碳酸钙结垢,稳定锌离子和分散氧化铁能力的测定,结果表明：聚天冬氨酸不仅具有良好的阻碳酸钙垢的性能,对锌离子也有一定的稳定作用,而分散氧化铁的能力则均好于聚马来酸和聚丙烯酸,是一种阻垢性能较好的水处理剂。     

Partial inhibition of acrylonitrile–butadiene–styrene dust explosion by sodium bicarbonate

During acrylonitrile–butadiene–styrene (ABS) plastic processing, dust explosions could occur in production and transportation. In this paper, the explosion properties and pyrolysis mechanism of ABS dust were studied. The inhibition effects of sodium bicarbonate (NaHCO₃) on ABS dust were investigated using the 20-L explosion chamber, Hartmann tube, and G-G furnace. The results demonstrated that NaHCO₃ effectively decreased both the ignition sensitivity and the explosion severity of ABS dust explosion by increasing the mass fraction of the inhibitor. Adding 50 wt% NaHCO₃ could reduce the explosion hazard to an acceptable level. Combined with an analysis of gas phase products and thermal decomposition behaviour, it was discovered that incorporating NaHCO₃ enhanced the heat stability of ABS dust. The decomposition of added NaHCO₃ produced a substantial quantity of CO₂, consuming many free radicals especially OH• and H•, which further reduced the decomposition temperature of ABS. The inhibitor effectively interrupted the combustion chain reaction and inhibited the propagation of the explosion. The results establish a scientific and operational basis for the prevention and management of dust explosion hazards in the ABS processing field.     

Inhibitor-regulated corrosion strategy towards synthesizing cauliflower-like amorphous RuFe-hydroxides as advanced hydrogen evolution reaction catalysts

Producing clean hydrogen energy by water electrolysis is considered as an effective route to solve the current energy and environmental problems. Herein, a facile inhibitor-regulated corrosion strategy is employed to synthesize efficient hydrogen evolution reaction (HER) catalysts. The corrosion inhibitor of D-sodium gluconate (SG) is adopted to slow down the serious reaction of iron foam (IF) in RuCl₃ aqueous solution. It is identified that the abundant hydroxy and carboxyl species of SG can compete with Cl^? to adsorb on the IF surface to weaken the drastic reaction between Ru³⁺ and IF, resulting in achieving uniform amorphous RuFe(OH)_x corrosion layers composed of nanoparticle aggregations. Owing to the sufficient exposure of active sites and electronic interaction between Ru and Fe sites, the optimized catalyst exhibits excellent HER activity of requiring a lower potential of 91 mV to reach a current density of 100 mA cm^?2 and maintains durable operation at 100 mA cm^?2 for 30 h without obvious fluctuations. This work supplies a facile inhibitor-regulated corrosion strategy for designing efficient catalysts for water splitting application.     

新疆某围岩蚀变型含泥金矿选矿试验

新疆某国有大型黄金矿山矿石特点为矿体极度破碎、原生泥和次生泥含量高,载金硫化矿浮选分离精度低,部分载金黄铁矿嵌布粒度微细且结晶程度较差,金的高效回收技术难度大。基于矿石工艺矿物学特性,取消原泥砂分选工艺,开发应用“全粒级粗磨粗选-中矿再磨单独选别-再选产品梯级返回”选矿工艺流程,强化泥质脉石高效抑制和载金矿物有效活化,应用泥质脉石抑制剂XJ-12和微细粒载金黄铁矿浮选增效剂AXJ-1,在原矿Au品位2.19g/t条件下,实验室全流程闭路试验获得Au品位30.30g/t、Au回收率86.28%的金精矿,有效降低细泥对浮选的干扰,提高难选目的矿物可浮性,实现了金的高效回收。     

环保型水基钻井液添加剂--复合多元醇SYP-1

在对多元醇作用机理研究的基础上研制了一种新型的复合多元醇ＳＹＰ－１。这种复合多元醇不需与无机盐配合就具有很强的抑制性,与无机盐配合作用效果更佳。ＳＹＰ－１具有良好的润滑性能,无毒,易生物降解,是配制环保型水基钻井液的理想的润滑防塌剂。     

甲基戊炔醇的合成及缓蚀性能

本文介绍了甲基戊炔醇的合成及缓蚀性能研究结果。甲基戊炔醇的产率达９２％，用正交设计试验法进行配方，以８０℃的１５％盐酸为腐蚀介质，Ｎ８０钢片为腐蚀试件，得到了合理的甲基戊炔醇缓蚀剂配方。以甲基戊炔醇配制的缓蚀剂，其性能优于以两种基他炔醇配制的缓蚀剂。     

膦基丙烯酸-马来酸酐共聚物阻垢剂ZPS-01的合成及阻垢性能

合成了膦基丙烯酸－马来酸共聚物阻垢剂ＺＰＳ－０１。最佳工艺条件为：ＡＡ、ＭＡ摩尔比７５：２５，次磷酸盐２０％，引发剂１０％，反应时间４ｈ，反应温度９０℃，静态阻垢性能测试结果表明，ＺＰＳ－０１用作油田污水的阻垢剂，综合性能优于常用阻垢剂ＨＥＤＰ。     

Discovery of Anti-tubercular Analogues of Bedaquiline with Modified A-, B- and C-Ring Subunits

To date, the clinical use of the anti-tubercular therapy bedaquiline has been somewhat limited due to safety concerns. Recent investigations determined that modification of the B- and C-ring units of bedaquiline delivered new diarylquinolines (for example TBAJ-587) with potent anti-tubercular activity yet an improved safety profile due to reduced affinity for the hERG channel. Building on our recent discovery that substitution of the quinoline motif (the A-ring subunit) for C5-aryl pyridine groups within bedaquiline analogues led to retention of anti-tubercular activity, we investigated the concurrent modification of A-, B- and C-ring units within bedaquiline variants. This led to the discovery that 4-trifluoromethoxyphenyl and 4-chlorophenyl pyridyl analogues of TBAJ-587 retained relatively potent anti-tubercular activity and for the 4-chlorophenyl derivative in particular, a significant reduction in hERG inhibition relative to bedaquiline was achieved, demonstrating that modifications of the A-, B- and C-ring units within the bedaquiline structure is a viable strategy for the design of effective, yet safer (and less lipophilic) anti-tubercular compounds.