对前苏联钛精矿用选择氯化法制取人造金红石的试验研究

通过对前苏联ＭＡＥＢＣＫＯ钛精矿进行选择氯化制取人造金红石试验，得出结论：在采用我国沸腾氯化技术的条件下，对前苏联钛精矿用选择氯化法制取人造金红石在工艺上是可行的。其人造金红石中ＴｉＯ２的含量达到９０．９０％，副产品三氯化铁的纯度达到８９．２４％。     

钛铁矿制取人造金红石流程产物的矿物相组成分析

主要论述了用Ｘ射线粉晶衍射分析和穆斯堡尔谱分析确定钛铁矿制取人造金红石流程产物中矿物相组成的方法及其结果。     

低品位高钛渣中钛组分制备金红石(英文)

介绍了以70%～75%TiO2的低品位高钛渣为原料制备人造金红石的分离工艺。低品位高钛渣中MgO,FeO,CaO,Al2O3和SiO2进入杂质相,钛组分进入金红石相,金红石相中TiO2品位达到90%～95%,可满足流态化氯化对杂质的要求。1050℃的低温预氧化与1510℃的高温热处理促使渣中分散于各矿物相的钛组分选择性转移并富集于金红石相,金红石相析出与长大,用稀硫酸和稀盐酸实现金红石相的分离。实验结果表明,金红石矿物相平均晶粒度可以达到25μm,通过稀酸选择性浸出改性渣,可以获得95%TiO2品位的人造金红石。     

稀盐酸加压浸出攀枝花钛精矿生产人造金红石的探讨

对攀枝花钛精矿，采用稀盐酸加压浸出法生产人造金红石的适应性和工业生产中存在问题进行了探讨。用该方法可得到高品位人工造金红石，并能满足氯化法钛白生产和海绵钛生产对原料的要求。     

高纯度人造金红石生产工艺——Heubach Reptile96

1　前　言目前 ,氯化法钛白的产量已超过钛白总产量的 56 %。氯化法生产钛白 ,原料中的铁以氯化铁形式除去 ,产出大量的氯化铁废料。生产钛白时 ,原料中的 Ti O2 含量越高 ,产生的废料就越少 ,因此 ,氯化法对原料纯度要求越来越高 ,促使人造金红石生产工艺不断改进 ,Heubach Reptile96高纯度人造金红石生产工艺就是在此情况下应运而生的。2　人造金红石生产新工艺人造金红石生产新工艺—— HeubachReptile 96是基于置换金红石法( Replacement rutile) ,取其中的 Rep和 tile,而产品中的 Ti O2 含量高达 96 % ,故称Heubach Reptile96 ,简…     

人造金红石生产路线的探讨

针对攀枝花钛铁矿中钙、镁含量高的特点，详细分析了目前国内外人造金红石的生产工艺及研究情况，提出了攀钢人造金红石可能的生产路线。     

还原-锈蚀法生产人造金红石技术现状及攀钢采用该工艺可行性分析

主要介绍了国内外还原-锈蚀法生产人造金红石工艺技术特点，并对攀枝花钛资源采用还原．锈蚀法生产沸腾氯化钛原料——人造金红石的可行性进行了分析探讨。     

高钛渣中钛组分的选择性富集与长大

研究了改性处理对高钛渣中钛组分选择性富集以及富钛相金红石晶体析出长大的影响。实验结果表明，氧化可使高钛渣中的黑钛石转化为金红石；渣中加入改性剂CaO和P2O5后，再经过热处理改性，有利于钛组分的选择性富集和金红石晶体的长大粗化。     

高钛原料的生产

高钛原料包括钛铁矿、天然金红石、钛渣和合成金红石等,根据用途可分为用于硫酸法制取氧化钛的和用于氯化法制取氯化钛及金属钛的两种.用硫酸法制取氧化钛时,考虑到溶解性.不能使用金红石型的原料,原料品位要从经济上考虑.人工合成的高钛原料中铁为主要杂质,其除去率影响着原料的质量,存在一个铁的残余量界限.     

攀钢集团钛产业的现状和展望

介绍了攀钢集团钛产业的生产现状，着重介绍了攀钢集团钛精矿以及攀钢集团下属的3个钛白粉厂的生产现状和目前存在的主要问题，并根据国内外钛产业的发展趋势提出了攀钢集团钛产业的发展方向，展望了攀钢集团钛产业的未来。     

Mineral phase reconstruction behavior of direct reduction and smelting titanium slag at high temperature and slow cooling

Titanium slag in this study was produced by subjecting titanomagnetite concentrate to direct reductionelectric furnace smelting. Processing mineralogy and mineral phase reconstruction behavior at high temperature and slow cooling treatment were examined by chemical analysis, X-ray diffraction(XRD), optical microscopy(OM), scanning electron microscopy(SEM), and energydispersive spectroscopy(EDS). Anosovite solid solution is the main titanium product by the direct reduction and smelting process. Results of slow-cooling experiments show that crystal volume and size increase as cooling rate decreases. Anosovite and gangue mineral crystals develop fully with large crystal volume and size at a cooling rate of 2 K·min~(-1). Moreover, the growth of anosovite crystal was characterized by crystal nucleation and growth theory.These results provide further insights into the separation of anosovite from gangue by mineral processing.     

Isothermal precipitation and growth process of perovskite phase in oxidized titanium bearing slag

The isothermal precipitating behavior of perovskite phase in oxidized titanium bearing slag was studied by quenching method. The kinetics of precipitating process and crystal growth of perovskite phase was analyzed. The results show that the precipitating and growth of perovskite are non-equilibrium process at the beginning of isothermal treatment. There are two factors influencing the growth rate of perovskite phase on non-equilibrium condition, one is the supersaturation concentration of perovskite and the other is the coarsening arising from the growth of larger perovskite at the expense of smaller ones. The precipitation kinetics of perovskite phase can be nearly described by the JMAK equation.     

Recovery of titania from high titanium slag by roasting method using concentrated sulfuric acid

By means of energy-dispersive X-ray spectroscopy(EDX) and scanning electron microscope(SEM)analysis,the phase structure characteristics of high titanium slag were analyzed.Through the single factor and the orthogonal experiment methods,the effects of material particle size,mass ratio of acid to ore,roasting temperature,and roasting time on the acidolysis ratio of TiO_2during the process of roasting high titanium slag with concentrated sulfuric acid were systematically investigated.The results show that the sequence of each factor affecting the acidolysis ratio of TiO_2 is:mass ratio of acid to ore,roasting time,and roasting temperature.The optimum technological conditions are obtained as mass ratio of acid to ore of 2.1,roasting temperature of 310 ℃,roasting time of 75 min,and material particle size of 45-53 μm.The acidolysis ratio of TiO_2 is over 96%under the optimum conditions.The roasting process is proved to be significant in the exploitation and utilization of high titanium slag.The advantages of the proposed roasting process are of high efficiency,low power consumption,and minimum pollution.     

工艺参数对含钛高炉渣合成(Ca,Mg)α''-Sialon-AlN-TiN粉的影响

以含钛高炉渣、硅灰、高铝矾土熟料和炭黑为原料,采用碳热还原氮化法合成了(Ca,Mg)α'-SialonAlN-TiN粉.用X射线衍射法测定了产物相组成及相对含量,研究了合成温度和恒温时间对反应过程的影响,并对合成机理进行了探讨.结果表明:合成温度对(Ca,Mg)α'-Sialon-AlN-TiN粉的合成过程影响显著,随着合成温度升高,产物中α'-Sialon相含量增大,1 480℃时α'-Sialon含量达最大,是最佳的合成温度.恒温时间对产物相组成的影响不十分显著,但较长的恒温时间可使还原氮化反应进行得更充分,恒温8 h的试样中α'-Sialon含量最高,是较理想的恒温时间.合成过程中SiO的挥发导致试样较大的质量损失,且随着合成温度升高和恒温时间延长而增大.     

含钛高炉渣合成(Ca,Mg)α''-Sialon-AlN-TiN粉末

在热力学分析的基础上,以含钛高炉渣为主要原料,采用碳热还原氮化法合成了(Ca,Mg)α'-Sialon-AlN-TiN粉.确定了合成过程的最佳工艺参数:反应温度1 480℃,保温10 h,配碳量为理论值的1.5倍,氮气流量400mL/min.采用X射线衍射仪和扫描电镜研究了合成产物的相组成和显微结构.结果表明:产物中除有主要物相α′-Sialon、AlN和TiN外,还有少量β-SiC,15R和β-CaSiO3等杂质相.其中,(Ca,Mg)α'-Sialon多以片状而AlN多以球形或短柱状形式存在.EDS分析结果表明,Ca2 、Mg2 都进入了α'-Sialon晶格中,但Ca2 的固溶量远高于Mg2 .     

高钛渣还原的氢化钛合金粉一步烧结制备高强钛合金（英文）

提出一种直接利用高钛渣制备高强钛合金的方法。先用镁粉还原高钛渣制备氧含量为1.3%(质量分数)的合金粉末,再将合金粉末在600 MPa压力下压制成小圆柱体,最后在氩气下烧结成钛合金产品。对还原粉末进行表征,研究烧结温度对烧结合金的烧后密度、抗压强度、显微组织和硬度的影响。结果表明,随着烧结温度由900℃升高至1200℃,钛合金的密度增加,孔隙率降低,实现较好的烧结致密化(1100℃为98.65%,1200℃为99.41%),在1100℃时硬度达到HV 655.7,压缩强度为1563 MPa。     

Decomposition of acid dissolved titanium slag from Australia by sodium hydroxide

The kinetics of the decomposition of acid dissolved titanium slag with a sodium hydroxide system under atmospheric pressure was studied. The effect of reaction temperature, particle size and NaOH-to-slag mass ratio on titanium extraction was investigated. The results show that temperature and particle size have significant influence on titanium extraction. The experimental data of titanium extraction show that the shrinking core model with chemical reaction controlled process is most applicable for the decomposition of slag, with an apparent activation energy of 62.4 kJ·mol⁻¹. Approximately 85 wt.%−90 wt.% of the titanium can be extracted from the slag under the optimal conditions. In addition, the purity of titanium dioxide obtained in the product is up to 98.5 wt.%.     

Preparation of Ti-rich material from titanium slag by activation roasting followed by acid leaching

A method of activation roasting followed by acid leaching using titanium slag was introduced to prepare Ti-rich material. The effects of H₃PO₄ dosage, roasting temperature, and roasting time on TiO₂ grade were investigated. A Ti-rich material containing 88.54% TiO₂, 0.42% (CaO+MgO) was obtained when finely ground titanium slag was roasted with 7.5% H₃PO₄ at 1000 °C for 2 h, followed by a two-stage leaching in boiling dilute sulfuric acid for 2 h. The XRD patterns show that the product is titanium dioxide with a rutile structure. Mechanism studies show that structures of anosovite solid solution and silicate minerals are destroyed in the roasting process. As a result, titanium components in titanium slag are transformed into TiO₂ (rutile) while impurities are transformed into acid-soluble phosphate and quartz.