共沉淀富集分离-ICP—MS法测定地球化学勘探样品中的超痕量金、铂、钯

建立了碲作为共沉淀剂分离富集,采用ICP—MS测定地球化学勘探样品中超痕量金、铂、钯的方法,并研究了共沉淀时各种因素的影响;确定了采用盐酸和氯酸钾分解试样,以2mg碲对金、铂、钯进行共沉淀分离富集,抽滤,残渣用王水溶解,采用电感耦合等离子体质谱法测定的条件。该方法检出限分别为：Au0．062ng／g、Pt0．041ng／g、Pd0．043ng／g,相对标准偏差（n=12）：Au4．81％、R5．46％、Pd3．50％。采用该方法测定了国家一级地球化学标准物质中的痕量Au,Pt,Pd,测定值与标准值相符合。     

小铅试金富集——电感耦合等离子体质谱法测定地球化学样品中的铂钯

建立了小铅试金富集—电感耦合等离子体质谱法测定地球化学样品中铂、钯的方法,样品处理采用小铅试金富集方法(试金扣7～11 g)代替了经典的铅试金法(试金扣40 g),碱式碳酸铅代替剧毒羰基镍,加入硝酸银保护剂,使铅扣灰吹后待测元素没有损失地进入银合粒中,干扰元素得到进一步分离,电感耦合等离子体质谱法(ICP-MS)测定铂、钯。该方法测定铂和钯的检出限分别为0.10 ng/g和0.12 ng/g,加入标准物质回收率为92.50%~106.75%,相对标准偏差(RSD)为2.35%~6.44%,其精密度和准确度满足要求。该方法灵敏度高、操作简便、结果准确度高,适合大批量地球化学样品的分析,在痕量贵金属的检测方面具有显著优势。     

电感耦合等离子体质谱法测定区域地球化学样品中的金铂钯

地球化学样品中的金、铂、钯含量极低,测定前必须进行有效分离。实验采用氯化钠、浓盐酸和饱和高锰酸钾分解混合液冷浸取分解试样,聚氨酯泡沫塑料富集、灰化,残渣王水溶解,电感耦合等离子体质谱法测定区域地球化学样品中的超痕量金、铂、钯。该方法的检出限分别为Au 0.039 ng/g、Pt 0.040 ng/g、Pd 0.058 ng/g,加入标准物质回收率为95.6%~102.5%,测定结果的相对标准偏差为0.33%~8.20%。该方法操作简单,分析速度快,准确度和精密度良好,适合大批量样品的分析测定。     

活性炭富集化学光谱法测定化探样品中的痕量铂、钯、金

研究了采用活性炭一次性富集铂、钯、金 ,化学光谱法快速测定分析。铂、钯、金检出限分别为 0 .2× 10 - 9,0 .1× 10 - 9,0 .1× 10 - 9。该方法已成功应用于化探样品分析中 ,并得到了令人满意的结果。     

氯化钠存在下溴化钠-十六烷基三甲基氯化铵体系浮选分离铂、钯、金的研究

研究了氯化钠存在下溴化钠-十六烷基三甲基氯化铵体系浮选分离铂、钯、金的方法及条件，在0．24mol·L^-1盐酸介质中，铂、钯、金浮选率为93．2％～98．0％，94．3％～97．6％，93．4％～99．0％，方法可用于从大量基体金属中分离铂、钯、金，对实际样品的分离分析结果与其他方法相符。提出了浮选是基于铂、钯、金溴络阴离子与阳离子表面活性物十六烷基三甲基氯化铵形成离子缔合物的机制。     

共沉淀富集分离矿石中微量金、铂、钯

研究了硒、铜、银、砷作为共沉淀剂。富集分离地质样品中金、铂、钯的最佳条件。在3mol/L HCl介质中，以4mg硒和5mg铜、银、砷对金、铂、钯进行共沉淀富集，采用孔雀绿分光光度法测定金．DDO分光光度法测定铂、钯，回收率均在95％-102％之间。通过对含金矿样加入铂、钯标准样品的回收实验，结果令人满意。     

负载泡沫塑料富集发射光谱测定化探样品中痕量金、铂、钯

贵金属（尤其是铂族金属）属于我国短缺矿种之一；为实现化探方法直接寻找贵金属金、铂、钯等，需要一种操作简便、检出限低、对仪器无特殊要求的分析测定方法。文中研究了在SnCl2存在下，用负载醋酸丁酯的泡沫塑料进行富集，发射光谱分析测定化探样品中痕量金、铂、钯的方法。该方法用于国家级标准样品的测定，结果与推荐值相符合。     

铅试金富集-ICP-MS测定化探样品中的金铂钯

传统的铅试金富集-ICP-MS测定方法具有容易灰吹,检测方便等优势,但其简单的富集条件所得出的检出限和精密度都达不到现代分析要求,尤其对于地质化探样品中超痕量金、铂、钯的检测,极容易出现超差。本文对该火试金富集的实验条件进行了优化,调整仪器测定条件,并与国家标样分析结果对比,结果精密度良好,检出限也能满足地质实验测试管理规范的要求。本次实验主要是将样品中的金铂钯经铅试金富集后,将所得到的贵金属合粒用硝酸与盐酸溶解后,直接在ICP-MS仪器上测定其中的金铂钯的含量。     

火试金ICP-AES同时测定熔剂金矿中的金、银、铂、钯量

文章确立了熔剂金矿经火试金富集,利用ICP—AES法同时测定金、银、铂、钯量的分析方法。确定了合适的分析谱线和最佳工作条件。各元素的检出限均小于5μg／L,回收率为97．05％-104．63％,RSD为1．96％-4．36％。实际应用中获得满意结果。     

石墨炉原子吸收光谱法测定化探样品中的金

在强酸性介质中,经动态活性炭吸附柱装置分离沉淀、富集金,用1％硫脲-盐酸溶液解脱,以抗坏血酸为基体改进剂,石墨炉原子吸收光谱法测定其中的金,该方法的线性范围宽（0～100ngmE）、检出限低（0．16×10^-19）、准确度（RE〈12％）和精密度（RSD〈25％）良好,适合批量化探样品中金的测定。     

冷轧辊表面毛化技术现状与进展

简述了几种新的冷轧辊表面毛化方法，比较种种毛化方法的工艺特性，同时介绍了冷轧辊表面毛化技术的国内外发展现状以及宝钢在轧辊毛化技术方面试验研究的进状况，最后提出几点看法。     

血清胱抑素C、内生肌酐清除率及尿微量白蛋白在恶性肿瘤含顺铂化疗患者肾功能评价中的地位

Objective: Chemotherapy drugs such as platinum may cause damage to the renal function, creatinine clearance (Ccr), as a "golden standard" indicator in clinical evaluation of renal function, was limited in application due to complicated detection steps. By detecting the expression of serum Cystatin C (Cys C), Ccr and urinary micro-albumin (UMA), this study was designed to analyze and discuss their roles and status in renal function evaluation for cancer patients before and after chemotherapy with platinum. Methods: We retrospectively reviewed 110 patients who receiving platinum-containing protocols or non-platinum-containing ones, and got the expression of Cys C, Ccr (was calculated by Cockcroft-Gault equation) and UMA, then analyzed whether there were differences for Cys C,Ccr and UMA in those patients; for patients with mildly impaired renal function (Ccr between 50–75 mL/min), whether there were differences for Cys C and UMA before and after chemotherapy with platinum. Results: There was statistical significance for Ccr, Cys C and UMA in patients who receiving platinum-containing protocols (85.01 ± 28.40) vs (76.79 ± 26.63) mL/min, (1.49 ± 0.50) vs (1.80 ± 0.84) mg/L and (14.30 ± 9.15) vs (16.90 ± 10.95) mg/L, P = 0.00, 0.00 and 0.01), and no statistical significance for those receiving non-platinum-containing ones (89.45 ± 29.69) vs (86.78 ± 27.96) mL/min, (1.51 ± 0.78) vs (1.63 ± 0.73)mg/L and (17.31 ± 10.46) vs (16.59 ± 8.33) mg/L, P = 0.45, 0.07 and 0.57); and there were also significant differences for Cys C for patients with mildly impaired renal function before and after chemotherapy (1.68 ± 0.55) vs (2.04 ± 0.68) mg/L, P = 0.03), while no statistical significance for UMA for the same ones (21.11 ± 10.06) vs (21.22 ± 8.81) mg/L, P = 0.93). There were statistical significance both for Cys C and UMA before and after chemotherapy in platinum-containing group, but the AUC for Ccr and Cys C is greater than that for UMA (P < 0.02). Conclusion: Cys C and UMA can both access renal dysfunction early after chemotherapy, but Cys C is more sensitive than UMA in reflecting early renal dysfunction, so Cys C can replace Ccr and become a reliable indicator in the assessment of renal function for cancer patients before and after chemotherapy especially with platinum.     

行星轧机的发展及取得的最新成果

介绍了行星轧机在国内外的发展情况及取得的最新成果。着重分析了常规双行星辊轧机和单行星辊轧机存在的问题。针对这些问题，提出了一种新结构的行星轧机，即复合式行星轧机。经在自制的实验用简易复合式行星轧机上实验表明，该轧机是可行的，不仅适用于薄板坯连铸连轧，而且对改造目前现存的行星轧机也有一定的实用价值。     

Online mechanical property prediction system for hot rolled IF steel

Abstract

Traditionally, mechanical property estimation is carried out by destructive testing, which is costly and time consuming. Sometimes, the time schedule in the mill is so tight that coils are dispatched, while the samples are still under investigation; thus, knowledge of the strip quality immediately after rolling without mechanical testing can save a lot of time and money. As the rolling process is complex and final mechanical properties of steel depend on many parameters, it is almost impossible to develop an accurate first principle based mathematical model, so an artificial neural network based model to predict the mechanical properties of hot rolled steel strip has been developed. This paper describes the neural network based online system that helps in predicting mechanical properties of interstitial free (IF) steel strip and also elaborates how this models can help in capturing various metallurgical phenomena during rolling.     

5-Br-PADAP-TritonX-100光度法连续测定铜和锰

研究了非离子型表面活性剂TritonX 1 0 0存在下 ,用 5 Br PADAP光度法联合测定铜和锰的方法。结果表明 :在 pH 9 0的硼砂缓冲介质中 ,5 Br PADAP与铜 (锰 )生成紫红色络合物 ,λmax=575nm ,ε575=1 0 4× 1 0 5。铜量在 0～ 1 4μg/2 5mL(锰量在 0～ 1 0 μg/2 5mL)的范围内符合比尔定律。实测了钢样中铜和锰的含量 ,结果令人满意。     

The effects of strength ratio on the forming limit diagram of tailor-welded blanks

In the present study, the influences of strength ratio (SR) are studied on the formability and forming limit diagram (FLD) of tailor-welded blanks (TWBs). AISI 340, St 12 and St 14 steel sheets with equal thickness of 1?mm were used as different kinds of steel to make TWB with different SR. TWBs were obtained by CO₂ laser welding of different steel sheets. Limit strength ratio (LSR) is introduced as a new useful factor to predict the FLD of TWB with different SR. Results of this research show that with increasing of difference of TWB’s SR and LSR, formability and the level of FLD will decrease. By SR increasing, limit dome height decreases and some defects such as weld line movement increase. The experimental findings show that the SR of TWB can effect on the position of fracture in the TWB products.     

本钢2300mm热轧AWC控制简析

全面、系统地对本钢2300mm带钢热连轧生产工艺过程中,带钢宽度控制的起因以及影响最终产品宽度的要素进行了介绍,并对当前使用的自动宽度控制系统的设计进行了介绍,给出了控制系统原理图、可实现的程序框图及控制策略应用。结果表明,该方法能有效地控制产品宽度。     

PbCl_2在不同盐酸浓度、Sb~(3 )浓度和温度条件下溶解度的研究

针对锑白生产过程中产品含铅高这一问题 ,用化学纯试剂研究了PbCl2 在不同盐酸浓度、Sb3 浓度和温度条件下的溶解度。     

面向对象的约束满足方法在钢铁企业调度系统中的应用

综合考虑钢铁企业调度问题的特点,利用面向对象的设计模式,提出了基于约束满足方法的冶、铸、轧一体化生产调度方法。该方法以解决工序间的衔接问题为重点,沿袭了面向对象模式的特点和优势,在系统的可扩充性和可维护性上显示了较优的性能。