[Chemical Composition] A completely homogeneous image can be formed between Mg[CO 3 ] and Fe[CO 3 ], and sometimes a mixture of Mn, Ca, Ni, Si or the like is formed. [Crystal Structure] Trigonal System; Siderite ore: a rhombohedral unit cell: a rh = 0.576nm; α = 47 ° 54 '; Z = 2; a hexagonal unit cell: a h = 0.468nm, c h = 1.526nm; Z = 6. The same structure as calcite . [Form] The crystal is in the shape of a rhombohedron, a short column or a triangular facet. Usually it is a granular, earthy, dense block assembly (Figures H-5, H-6). FIG magnesite ore H-5 crystals aggregate Figure H-6 Siderite crystal aggregate [Physical properties] Rich Mg end users are white or light yellowish white, grayish white, sometimes with a reddish hue, rich in Fe yellow to brown, brown; glass luster. Cleavage {10 [genesis and occurrence] Magnesite is mainly composed of Mg hydrothermal liquid substituted dolomite and ultrabasic rock, in addition to sedimentary type. Siderite is also available in both sedimentary and hydrothermal forms. [Identification characteristics] Similar to calcite, the difference is that the powdered cold HCl does not blister or the action is extremely slow, and the heated HCl is vigorously foamed. [Uses] magnesite refractory brick system can be used (3000 ℃ can withstand high temperatures), magnesium cement, metal magnesium may extract; as siderite iron ore mining.
For a mineral Beneficiation Plant, there are still some percentage which are not liberating the ore thoroughly, so it's necessary to separate them and send to Ball Mill for regrinding, both Spiral Classifier and hydro-cyclone are here to achieve the function of mineral classifying, spiral classifier is used to separate the ore and gangue with overflow method, the fine particles will overflow the spiral classifier meanwhile the gangue sets at the bottom of the spiral classifier, and will move upwards to the higher end, finally will be sent back to ball mill, and the hydro-cyclone is to separate the two parts by gravity difference.both of them are commonly used for mineral beneficiation plant, for example, gold ore processing plant, copper ore processing plant, zinc ore processing plant, lead ore processing plant, graphite processing plant, iron ore processing plant, and so on.
Classifying Machine,Spiral Classifier,Screw Classifying Machine,Mineral Classifying Machine Henan Mingyuan Heavy Industrial Machinery Company Co., LTD. , https://www.heavyequipmentchina.com
. Magnesite : rhombohedral unit cell: a rh = 0.566 nm; α = 48 ° 10';  Z = 2; hexagonal unit cell: a h = 0.462 nm, c h = 1.499 nm; Z = 6. 1} Complete. Hardness 3.5 to 4.5. The relative density of 2.9-4.0, the relative density and refractive index of Fe-rich ones increase.
Magnesite - Siderite
Mg[CO 3 ]—Fe[CO 3 ]