The smelting method for the extraction of vanadium from vanadium iron concentrate is fire method and wet method. The vanadium iron concentrate is smelted by vanadium iron concentrate to obtain vanadium-containing iron water, and then the vanadium slag is blown by converter, and the vanadium slag is further wet. The method extracts vanadium-containing products. Vanadium extracted by fire method has been used in industrial production, but the recovery rate of vanadium is low. The vanadium extraction by wet method is directly subjected to sodium smelting and leaching of iron concentrate to obtain vanadium-containing and iron-containing products, and the iron-containing products are sent to iron making. The vanadium extraction by wet method is better, and the comprehensive utilization of resources is better. The recovery rate of vanadium is higher, but it is still in the industrial test stage. The vanadium extraction method of the hydrothermal vanadium-containing iron ore is the same as above.
Second, ilmenite ore. Titanium Placer titanium minerals ilmenite, rutile, anatase and leucoxene other less; often with zircon and monazite symbiotic, heavy minerals were fine state; gangue silicon salt Mineral-based, re-election, magnetic separation and electro-election combined processes are used in production. The sand mine is pre-concentrated by a conical concentrator, a fan-shaped chute, a spiral concentrator, a jigging or a shaker to obtain a coarse concentrate containing heavy sand minerals, and then the ilmenite is recovered by medium and strong magnetic separation; strong magnetic separation Recycled monazite; shaker in addition to gangue; elective separation of zircon and rutile, to obtain a variety of concentrates. In order to obtain qualified concentrates, the selection process of general coarse concentrates has many operations and changes greatly, and sometimes the ilmenite concentrate is further dephosphorized by flotation.
In addition to vanadium-titanium magnetite ore and titanium sand ore, there are a few veins of titanium. For the metamorphic basic rock type rutile ore, the rutile concentrate is obtained by re-election-strong magnetic separation-electrical selection, flotation and flotation-calcination magnetic separation. The flotation-re-election process of gabbro-type apatite-containing ilmenite ore was tested to obtain two concentrates of ilmenite and apatite.
Due to the limited resources of high-titanium minerals, various methods for the production of rutile from ilmenite have been studied, such as the choice of chlorination and reduction rust.
Third, vanadium-containing carbonaceous slate . Sedimentary vanadium-bearing carbonaceous slate is also an important one in China's vanadium resources, and is still in the research stage. The vanadium in the ore is a mineral such as vanadium mica embedded in the micro-industry or in the attached state. It is difficult to be enriched by the beneficiation method. Therefore, vanadium extraction by hydrometallurgy has been studied. The ore is first calcined to remove charcoal, followed by sodium roasting and water leaching. The water leaching residue can be further leached with acid leaching to further increase the leaching rate of vanadium. Sometimes the ore is selected by flotation and enrichment with vanadium-containing coarse concentrate, and then roasting and leaching, which can significantly reduce acid consumption.
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