A New Technology to Prepare Ba3(VO4)2 from Tailings of TiCl4 Refining

Russian Journal of Non-Ferrous Metals - In this work, vanadium is extracted from tailings of TiCl4 refining by a clean metallurgical process and Ba3(VO4)2 is prepared by adding BaCl2 into the...     

Adhesion of liquid nickel to materials of the Si3N4-ZrO2 and Si3N4-Cr2O3 systems

Conclusions Refractory silicon nitride materials containing up to 50 wt.% of chromic and zirconium oxides (stabilized with CaO) are suitable for applications involving contact with liquid nickel.Translated from Poroshkovaya Metallurgiya, No. 5(173), pp. 91–93, May, 1977.     

A Novel Technology to Prepare FeVO4 from TiCl4 Refining Tailings

Russian Journal of Non-Ferrous Metals - In this work, vanadium is extracted from TiCl4 refining tailings by a clean metallurgical process and FeVO4 is prepared by adjusting the pH of acid leaching...     

用TiCl4制备纳米TiO2的研究状况

综述了以TiCl4为原料制备纳米TiO2的主要方法:氢氧火焰水解法、气相氧化法、气相燃烧法、液相沉淀法、溶胶-凝胶法、微乳液法和水热法,并对其优缺点做了相应的评论,最后指出了今后研究的方向。     

用TiCl4制备纳米Ti02的研究状况

综述了以TiCl4为原料制备纳米TiO2的主要方法：氢氧火焰水解法、气相氧化法、气相燃烧法、液相沉淀法、溶胶-凝胶法、微乳液法和水热法，并对其优缺点做了相应的评论，最后指出了今后研究的方向。     

四氯化钛低温水解直接制备金红石型纳米二氧化钛

以四氯化钛为原料, 在低温条件下水解, 直接得到金红石型纳米二氧化钛粉体. 通过对粉体进行XRD, TEM和BET等的表征表明, 四氯化钛的盐酸溶液在低温水解中直接生成金红石相质量分数高达99.24%的沉淀产物, 经干燥或进一步在较低温度（200, 300, 400 ℃）下煅烧即可得到金红石型二氧化钛粉体, 制得的粉体粒子呈椭圆形, 粒径为10～30 nm, 且分散性好, 比表面积大.     

铁酸锌纳米薄膜的液相水热合成

以不锈钢和玻璃作为基底,氟铁酸铵和硼酸为前驱体,用液相沉积法得到水合氧化铁薄膜,然后在0.2mol/L的Zn2+溶液中进行水热转化,最终形成铁酸锌薄膜。通过XRD、SEM和TEM对薄膜的物相和表面形貌进行表征,用XPS对薄膜表面元素价态进行确定,结果表明:在水热温度为175~250℃、pH=5~11、水热时间12h可以成功合成铁酸锌薄膜,铁酸锌粒径约20nm。紫外-可见光吸收谱(UV-Vis)表明其光响应范围为λ<473nm,电化学测试表明其光生电位低于不锈钢的自腐蚀电位。     

喷雾干燥回收沉淀泥浆中的TiCl4

采用喷雾干燥法对粗四氯化钛沉淀泥浆中TiCl4的回收进行了研究。首先,在实验室以空气作为沉淀泥浆干燥的加热介质,进行喷雾干燥。然后,在生产现场以氩气作为沉淀泥浆干燥的加热介质,进行喷雾干燥。研究结果表明,以氩气作为沉淀泥浆干燥的加热介质,在喷雾驱动进气压力为0.5 MPa,加热干燥进气压力为0.15 MPa,加热干燥进气温度为350℃,尾气出口温度为125℃的条件下喷雾干燥,沉淀泥浆中TiCl4的含量由55.3%(质量分数,下同)降至1.8%,对应泥浆中TiCl4的蒸发率达98%以上,回收率达96%以上。     

对无汞法测定全铁的改进

三氯化钛一钨蓝重铬酸钾滴定法是一种准确测定铁矿石中全铁的方法。但它不完全适用于本矿矿石，我们在溶解、还原等方面进行改进，改进后的方法准确、简便、实用。     

水解在四氯化钛精制中的应用分析

研究了粗四氯化钛预水解技术和采用铝粉除钒的四氯化钛精制蒸馏釜底残液水解技术。通过从四氯化钛混合液水解前后主要成分的变化情况、四氯化钛水解反应机理、水解过程控制等方面对TiCl4精制工序的预水解和蒸馏釜底残液水解技术应用进行了分析，确定了TiCl4水解的加水量、加水方式和水解后混合液沉降时间是TiCl4水解工艺过程的关键控制点，并与传统处理工艺进行了比较。     

精制TiCl4蒸馏釜残液水解回收处理研究

研究了氯化法生产四氯化钛中对粗四氯化钛精制产生的蒸馏釜残液进行部分水解后，回叫收TiCl4的工艺，简要分析了该回收处理工艺的反应机制、特点及关键控制点。     

Activities in the liquid system NaF-MgF2-AIF3

Measurements were made at 1020 ‡C of the contents of Mg and Na in Al in equilibrium with NaF-MgF₂-AlF₃ melts in the range of NaF/AlF₃ molar ratios of 2.5 to 4 and MgF₃ molar frac-tions up to 0.13 (15 wt pct). The theory necessary to derive activities of the three constituents is given. In terms of NaF being a base and A1F₃ an acid, MgF₂ is an acid. The activity coef-ficients of MgF₂ can be accounted for quantitatively on the basis of the existence of Na₂MgF₄ and Na₂Mg₂F₆ species in the melt. A few similar measurements were made at 970 ‡C, permitting estimation of the amount of Mg to be expected in the metal of a reduction cell. Discrepancies suggest that the CaF₂ and A1₂O₃ present in the electrolyte of the latter influence the activity coefficients of MgF₂ and/or A1F₃. The experimental work was carried out when both authors were at what was then the Arvida, Quebec, Laboratory of The Aluminum Company of Canada Ltd.     

熔盐氯化法制备粗TiCl_4过程热平衡控制研究

对TiO_2品位为74%的高钙镁钛渣物相组成及氯化行为、熔盐氯化生产粗四氯化钛过程的熔盐温度控制进行了分析。结果表明,在粗四氯化钛单炉产量为100t/d的条件下,通过合理调节返炉矿浆量,可将钛渣氯化过程的熔盐温度与混合炉气温度分别稳定控制在740～770℃与350～501℃,并产出平均固相含量4.06～4.1g/L的合格粗TiCl_4产品。     

The oxidation of liquid Ni3S2

Using a levitation technique, molten nickel sulfide droplets were oxidized at temperatures above 1500°C under oxygen potentials varying from 5 to 40 pct in He gas. To analyze the results, the oxidation process was divided into two stages. The first stage corresponded to the desulfurization of Ni₃S₂ by oxidation of the dissolved sulfur. In the second stage, a small amount of desulfurization, oxidation of nickel vapor and absorption of oxygen gas into the droplet occurred. Both stages were found to be controlled by mass transfer of oxygen within the gas boundary layer. Under conditions of high oxygen potential, a halo appeared around the levitated droplet during the initial period. This halo disappeared during desulfurization, but reappeared towards the end of the oxidation period. Formerly Post-Doctoral Fellow, Department of Metallurgy and Materials Science, University of Toronto.     

TiCl4共沉淀法合成超细钛酸钡粉体

本研究采用TiCl4和BaCl2配制混合溶液,加入自制混合表面活性剂,以NH4HCO3和NH3·H2O作沉淀剂合成钛酸钡前驱体,再经过1020℃煅烧制成超细钛酸钡粉体.研究了物料配比、TiCl4浓度、表面活性剂用量、加料方式、反应温度、煅烧温度等因素对钛酸钡理化指标的影响,合成.     

2LiNH_2/MgH_2+5%M(M=0,AlCl_3,MgCl_2,TiCl_3)合金的制备与储氢性能

在氢气保护下,通过机械合金化制备2LiNH_2/MgH_2+5%M(M=0,AlCl_3,MgCl_2,TiCl_3)复合材料,研究添加金属卤化物对2LiNH_2/MgH_2复合材料相结构及储氢性能的影响。结果表明,复合材料的相结构主要由MgH_2和LiNH_2组成,且添加MgCl_2和TiCl_3后复合材料的粒度相对较小;2LiNH_2/MgH_2复合材料在添加金属卤化物后表观活化能增大,但在相同的温度下吸氢速率明显增大,并在升温速率为8K/min时添加这些金属卤化物后都能使复合材料的氢化反应温度降低。