How To Separate The Different Mineral Components Of Quartz Ore？
In quartz ore beneficiation, the separation of different mineral components and quartz has a great influence on the purity of quartz concentrate. The common mineral components in quartz ore include mica, feldspar, iron-bearing minerals, and apatite. The following sections describe how the common mineral components of quartz are separated.
1. Mica mineral separated from quartz
In quartz ore, after grinding and dissociation of mica with a layered structure, a large number of anions are exposed on the surface, which can be collected by cationic collectors in a wide pH range. Although the collection properties of mica minerals and feldspar minerals are similar, the flotation pH range of mica is wider, so mica minerals can be flotation first under strongly acidic conditions. The reagent system for mica mineral flotation separation is relatively simple, and generally the concentration of the pulp can be adjusted to between 30% and 35%.
2. Feldspar mineral separated from quartz
Quartz and feldspar are both framework silicate minerals, which are similar in nature and structure, and it is difficult to separate them. By using alkali metal ions to adjust the zero-electric point of feldspar, quartz can be effectively separated from feldspar. Feldspar and quartz separation methods mainly include fluorine flotation and fluorine-free flotation.
3. Iron-bearing minerals separated from quartz
There are many types of iron-containing minerals in quartz ore, including pyrite, ilmenite, hematite, and magnetite. In the process of separating iron-bearing minerals and quartz, it is the key to determine the appropriate sorting process to find out the occurrence form of iron impurities and the distribution form in each particle size. The commonly used method for separating iron minerals is strong magnetic separation, which can remove the iron minerals dissociated from the monomer after grinding. The scrubbing method can also remove the iron oxide film on the surface of the quartz particles. Pickling has a better effect on removing iron minerals. If the iron content requirement is relatively high, use pickling.
4. Apatite mineral separated from quartz
Phosphorus in quartz ore generally exists in the form of apatite, which can be recovered by fatty acid soap anion collectors, such as sodium oleate, oxidized paraffin soap, tall oil, etc.
The above is the separation methods of the four common mineral components of quartz. In actual production, mineral components are more complex, and the selection of flotation reagents and flotation sequence are the key factors affecting the separation effect. It is necessary to analyze the mineral processing test, formulate the process plan in a scientific and reasonable way, and avoid the economic benefits of the mineral processing plant from being affected.
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