For iron ore, The gravity separator method is mainly used to separate weakly magnetic iron ore. There are two applications: one is the geological product of the ore deposit
Selection of Various Mineral Processing Technologies and Equipment
The ore body is relatively high ,But the ore body is thin or there are many interlayers. During mining, Waste rock is mixed in, resulting in ore impoverishment
It is possible to use only crushing without grinding, and in cases of coarser particle size, discard coarse-grained tailings through gravity separator to restore geological quality
Obtaining coarse-grained medium grade concentrate, further processing, or directly sending it to the blast furnace for smelting, is called coarse-grained weight
Select. Another approach is to treat red ore or mixed ore with finer particle size (i.e. red ore with weak magnetism and magnetite with strong magnetism),
After crushing and grinding to separate individual iron minerals, fine-grained high-grade concentrate is obtained through gravity separator or magnetic gravity separation. This is called
For fine-grained re selection.
Coarse gravity separation of iron ore
A certain iron ore deposit belongs to a medium high temperature hydrothermal deposit. The main metal minerals in the ore are hematite, pseudohematite, magnetite, and mirror
Iron ore, limonite, etc; The main gangue minerals are quartz, calcite, apatite, iron clay, etc. Iron minerals are present in the deposit
The fine-grained aggregates form dense and loose blocks, some of which are embedded in the vein stones in the form of disseminated and honeycomb shapes, with a disseminated particle size of one
Generally, the geological grade of the ore body, and the grade after mining and dilution, as shown in the figure of
Re selection process flow selection, when the original ore grade, the concentrate grade can be obtained , tailings grade
, recovery rate concentrate cost.
Fine grained gravity separation of iron ore
The red iron ore processed by a certain iron ore beneficiation plant is Anshan style hematite quartzite, which is a transitional product of magnetite oxidation to hematite
Things. The main metal minerals are hematite and magnetite, with small amounts of limonite, specularite, pyrite, etc. Main vein mineral
If it is quartz and contains a small amount of hornblende, chlorite, calcite, etc. This type of ore is actually a mixed type ore, and mining
Mineral Processing Technology and Equipment for Black Metal Mines
Use magnets! Double selection, using weak magnetic separation equipment to prioritize the selection of strong magnetic minerals - magnetite, and then using gravity separation method to separate hematite
Separate from gangue, the process flow is shown in the figure. The ore dressing index obtained by using this process is: when the original ore grade 29.71% Fe,At this time, the concentrate grade 65.1% Fe, recovery rate 71% Fe can be obtained.
