Wyniki wyszukiwania - BazTech

1

Synergistic effect of a mixture of dodecylamine and kerosene on separation of magnetite ore

Liu A., Fan M.-Q., Li Z.-H.

Physicochemical Problems of Mineral Processing

|

2016

|

Vol. 52, iss. 2

647--661

EN

In this study, it was discovered that a mixture of dodecylamine (DDA)-kerosene demonstrated a stronger collecting ability for pure quartz and higher selectivity for magnetite ore. The relationship between the DDA-kerosene composition and mineral flotation performance on reverse flotation of magnetite ore was investigated. The results showed that floatability of the floating material increased when the DDA consumption increased. Specifically, during flotation, the fine particles (-0.074 mm fraction) selectively floated with DDA-kerosene. The difficult to float coarser particles (+0.074 mm fraction) with high content of quartz, required higher DDA dosage. However, higher DDA input during the flotation process did not necessarily yield better outcomes. The best results were obtained for 40/60 amine-to-oil ratio, as the quartz floated markedly with smaller magnetite loss and the flotation behavior was superior to pure DDA. Magnetite concentrates with 1.83% SiO2 and 71.04% Fe were produced using 120 g/Mg of DDA-kerosene (WDDA=40%).

2

The influence of the degree of iron-ore enrichment on it’s metallization parameters

Amdur A. M., Pelevin A. E., Purevsuren B., Munkhtuul L., Raznitsina A. L.

International Letters of Chemistry, Physics and Astronomy

|

2013

|

Vol. 14

89--95

EN

Have been developed a scheme of enrichment (benification) of magnetite iron-ore concentrates with total content of Fet = 31 % in ore at magnetic separator and obtained a superconcentrate with Fet = 69,50 %. Experimentally determined that the reduction reaction degree of Fe by coal increases linearly with increasing of the content of Fe in concentrate. Certainly it has positive influence of decreasing the content of more difficult for reduction and poor magnetic iron containing components in the processing of wet magnetic separation (WMS). Almost all iron are in the form of good to reduce magnetite in the superconcentrates and enrichment of concentrate accompanying with growth of specific surface.

3

From magnetite ore to modern magnetic materials.

Wysłocki J. J.

Archives of Materials Science

|

2006

|

Vol. 27, nr 2-3

67-84

EN

The article describes the major stages of research on magnetic materials carried out over the centuries, which have contributed to the discovery and further understanding of new materials. In relation to the above results of investigations carried out in recent years at the Institute of Physics of the Częstochowa University of Technology, concerning the determination of the sources of the magnetic properties and the mechanisms of magnetization of magnetically hard materials, in conjunction with the observations of the domain structure, are presented. Moreover, further interesting results have been obtained from the investigation of the microstructure and magnetic properties of magnetically soft materials - amorphous and nanocrystalline films. New technologies for the production of magnetic materials using the arc-plasma spraying technique and the suction-casting method enabling the production of massive amorphous alloys (bulk amorphous magnetic materials) are also described.