论文部分内容阅读
埃及海岸钛铁矿的储量很大,但是由于这些矿物原料的钛品位和Fe~(+2)/Fe~(+3)比值低而且铬含量较高,因而在颜料市场上无销路。矿物中所含的铬主要赋存于单体分离的铬铁矿颗粒以及和铬-尖晶石共生的颗粒之中。此外,矿物中所含的铬分布率特殊,在主要钛铁矿的各不同磁性部分中都是如此。采用了500-550℃的烃轻度还原焙烧方法,以期在钛铁矿-赤铁矿连生体颗粒中暴露的赤铁矿表面上生成磁铁矿海绵层。这样,连生体和均匀的钛铁矿颗粒二者的磁性都得到加强,而且已足可以同铬铁矿颗粒的磁性分别开。因而大部分钛铁矿-赤铁矿连生体颗粒可以作为强磁性矿物被分选出来。本文叙述的生产钛品位高、Fe~(+2)/Fe~(+3)比值高而铬含量低的精矿的方法就是在磁化焙烧之前和之后进行磁选的方法。
There is a large reserves of ilmenite on the coast of Egypt, but these mineral raw materials have no market in the pigment market because of their low titanium content and low Fe ~ (+2) / Fe ~ (+3) ratio and high chromium content. The chromium contained in the minerals mainly occurs in the chromite particles that are separated by the monomer and in the particles that coexist with the chromium-spinel. In addition, the distribution of chromium in minerals is exceptional and is true for the various magnetic parts of the major ilmenite. A mild hydrocarbon reduction calcination at 500-550 ° C was used to generate a magnetite sponge layer on the surface of the hematite exposed in the ilmenite-hematite colony. In this way, both the magnetism of both the biomimetic and homogeneous ilmenite particles is enhanced and sufficient to separate from the magnetism of the chromite particles. As a result, most ilmenite-hematite ganglion particles can be sorted out as ferromagnetic minerals. This paper describes the production of high quality titanium, Fe ~ (+2) / Fe ~ (+3) high concentration of chromium concentrate and low concentration of the method is before and after magnetization roasting magnetic separation method.