Introduction to Limonite and Beneficiation Technology
Limonite is brown in various tones, generally stalactite, grape-like, dense or loose block or even earthy, and also has a crystal shape like pyrite (called illusion). In addition to extracting iron, limonite can also be used as a pigment. The color of loess is mainly formed by containing them.
Earlier, it was thought that limonite is an independent mineral with a composition of 2Fe2O3·3H2O, but X-ray diffraction analysis shows that most of them are cryptocrystalline goethite, which can be mixed with lepidocrocite, hematite, quartz, and clay. It contains adsorbed water and capillary water, and its composition is variable, but it is basically FeO(OH)·nH2O. The physical properties can be changed, but it is always brown in various tones, with streaks of yellowish brown.
Generally, the iron content of limonite ore is 37% to 55%, and sometimes it contains high phosphorus. Limonite has strong water absorption and generally adsorbs a large amount of water. After roasting or heating in a blast furnace, the free water and crystal water are removed, and the porosity of the ore is increased, which greatly improves the reducibility of the ore. Therefore, limonite has better reducibility than hematite and magnetite. At the same time, due to the removal of water, the iron content of the ore is increased accordingly.
It is limonite beneficiation equipment and hematite beneficiation equipment. The equipment is used for limonite beneficiation and hematite beneficiation. This series of equipment is used for the separation of low-grade weakly magnetic limonite and hematite, which can increase the grade by 3-7% at one time, and solves the problem that low-grade limonite and hematite cannot be smelted in the furnace. The problem of difficult sales has found a way out for low-grade ore, which can produce considerable economic benefits. The equipment has a high return on investment and is a good project with less investment and quicker results.
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