INDUSTRIAL APPLICABILITY current primary titanium ore (ore vein) were all titanium-containing composite iron ore. In order to utilize the titanium resources, depending on the nature of the ore, the entire beneficiation process can be divided into three stages: pre-selection, iron selection and titanium selection. The titanium part can be divided into two stages: rough selection and selection.
Some titanium vein ore, when crushed to a certain degree of coarse grain state, a considerable number of gangues to achieve basic monomer dissociation, these coarse-grained monomer gangue can be discarded by pre-selection operation, to increase the selection of plants Processing capacity and the purpose of improving the selected grade. The pre-selection operation can be carried out according to the nature of the ore at the appropriate stage of the coarse, medium and fine crushing operations before the grinding operation. The pre-selected common methods are magnetic separation and re-election.
Second, the election of iron
Titanium-containing composite iron ore, the main purpose of industrial utilization at present is to obtain iron concentrate for iron making; for ore containing high vanadium , it is obtained from ferro-vanadium and vanadium-iron concentrate for iron making and vanadium extraction. The iron selection is carried out by a simple and effective magnetic separation method. After the ore is crushed (or pre-selected) and ground to achieve an optional monomer dissociation degree, the iron ore or vanadium iron concentrate is selected by a drum or belt weak magnetic field magnetic separator. The magnetic separation tailings are the raw materials for comprehensive recovery of titanium.
Some ore iron and titanium minerals are densely embedded. It is difficult to obtain a single concentrate by a single beneficiation method. Only the tailings are discarded by re-election, and the obtained iron and titanium mixed concentrates are directly calcined and smelted to produce High-purity pig iron and titanium slag products.
Third, choose titanium
The recovery of titanium in the titanium vein ore is carried out in a magnetic separation tailing after the iron concentrate is selected. The methods used for titanium selection include re-election, magnetic separation, electro-election and flotation. Depending on the nature of the ore, different mineral processing methods are used to form different process flows for sorting. There are several types of beneficiation processes currently used in the industry:
Re-election - electrification process
The re-election-electrical selection process is characterized by re-election and rough selection. The equipment used for re-election is mainly a spiral concentrator (including a spiral chute), followed by a shaker. Re-election with a conical concentrator has been carried out to the industrial test stage, but has not yet been formally used for production. In the re-election roughing stage, the purpose is to discard the low-density gangue and obtain the coarse concentrate selected for power supply.
The equipment used for electrification is a roller type electric separator, the purpose of which is to further re-select the coarse concentrate to achieve the final concentrate standard. For sulfur-bearing ores, flotation is commonly used as an auxiliary process for the removal of sulfide ore between the coarse and fine processes.
Re-election-magnetic separation-flotation process
The re-selection-magnetic separation-flotation process is characterized by the first classification of the ore entering the titanium separation, the coarse-grained stage is re-elected by rough selection, the magnetic separation is selected, and the fine-grained stage is selected by flotation. The re-election is carried out by a shaker, and the magnetic separation is performed by a magnetic separator. The flotation feed size is generally -0.074 mm, and the flotation agents used are sulfuric acid, sodium fluoride, oleic acid, diesel oil and pine oil.
The single-flotation method is a more effective beneficiation method for selecting fine-grained titanium veins. The single-flotation process is simple, and the operation and management are convenient. However, since the consumption of chemicals will increase the cost and the environmental protection problems caused by tailings discharge, the current industrial application is not widespread.
The flotation agents used in the flotation of titanium include sulfuric acid, tart oil, diesel oil and emulsifier Et-oxolp-19. In order to improve the flotation effect, the high concentration and long-term stirring of the ore dressing and flotation agent before flotation has a certain effect.
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