Feldspar is the floorboard of the feldspar group rock lead, it is a kind of calcium, sodium, and potassium aluminosilicate minerals is one of the most common minerals in the crust, the proportion of 60%, can be in the igneous, metamorphic and sedimentary rocks. Feldspar is the main mineral composition, almost all of the igneous rock is of great significance for the classification of the rock. Because often found in feldspar minerals and ferromagnetic material is greatly reduced the quality of the feldspar, feldspar prices. So how to reduce the iron content of feldspar and improve the quality of feldspar, and increase economic benefits become the major problems ahead for feldspar mining, processing enterprises. Especially in recent years, the early high quality low iron feldspar mineral resourcesThe source has been almost exhausted, plus now need feldspar enterprises to feldspar quality requirements are increasingly high, using the existing feldspar resources with high iron content to prepare low iron feldspar to highlight the value, it is imperative.
Feldspar iron removal before the need to make clear the following issues:
1. Occurrence form of iron in feldspar:
Iron in feldspar often magnetite ore, red, black mica, chlorite, ilmenite forms exist, such as more than a few exist in the form with magnetic characteristics, can completely through the magnetic separation, low cost way to reduce iron content. Of course, the iron will be in the form of non-magnetic characteristics exist in ore, the chapter on magnetic separation, skip this kind of situation.
2. Particle size of dissociation between magnetic particles and ore:
If iron is removed from a block of ore (the mineral iron), there is only one possibility: iron is present in the ore as ferric oxide.
In general, the particle size of material 30, ferromagnetic impurities and ore have been basically disintegrated, and good results can be achieved by magnetic separation.
1. Whether the magnetic force provided by the magnetic source of the magnetic separator is appropriate.
Well known: enter the magnetic field, the magnetic material stress depends on the size of the point at which the size of the magnetic field force, not only depends on the size of the magnetic field and magnetic field force of the high and low, also with that point has close relation with the magnetic field gradient. Blindly pursue the construction of a high magnetic field intensity and magnetic field gradient is clearly a very low-level mistakes. However, most of the magnetic separation equipment on the market on the design of the magnetic source is not fully considered, as a direct result of the low intensity magnetic separation equipment.
2. Feeding speed and material particle size.
The speed of feeding should be in strict accordance with the designed capacity of the equipment. As for the particle size of materials, strictly speaking, a designed magnetic separation equipment can only be used for the separation of materials with relatively concentrated force distribution.
3. Whether the movement state of materials in the magnetic separation process is conducive to magnetic capture.
When a piece of magnetic material is slowly put on the magnet, it may be attracted, but if you throw it on the magnet far away, it is quite likely to be the opposite result. Therefore, when selecting the magnetic separator, we should consider that the boring master can make the maximum contact with the magnetic separation inside the magnetic separator to achieve good magnetic separation effect.
4. Whether the unloading method provided by the magnetic separation equipment itself is reasonable, that is, whether the magnetic field can clean up the magnetic substance in time after capturing it without affecting the magnetic field's next capturing ability. Advantages and disadvantages of feldspar iron removal equipment in the market:
1. Drum type magnetic separator: the weak magnetic field is not ideal for the mineral iron in the raw ore, and it is suitable for removing the added mechanical iron in the processing process.
2. Roller-type magnetic separator: high magnetic field, but there is leakage separation, strict requirements for incoming particle size, sorting thin tape vulnerable, replacement.
3. Magnetic bar: dry method, the sorting effect is not obvious because it cannot be cleaned automatically, and it is almost a decoration.
4. Electromagnetic vertical ring: investment, operation cost Gao Guote equipment new type magnetic separator with belt type separation mechanism, on the separation from feed to discharge, can be many times for material magnetic stirring, remove without magnetic tailings, with operation to plate separator magnetic area off with a magnetic mineral magnetic device is to take off the take off, to complete the separation process, and achieve a good quality
