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Click to add WeChatIron is of great significance to the development of our country. Nowadays, the demand for iron ore is increasing, and easy-to-select iron ore is gradually decreasing. Therefore, difficult-to-select iron and poor iron have become the objects of development. Effective development of difficult-to-select poor iron ore is the key to alleviate the current relative shortage of iron concentrate in my country. Below we take a high-phosphorus-containing poor vanadium-titanium magnetite beneficiation plant as an example to introduce its beneficiation process.
Ore properties: The iron ore is an ultra-poor vanadium-titanium magnetite. Although the reserves are rich, the iron ore is quite small, only 9~13%. In addition to iron, it also contains silicon, aluminum, calcium, magnesium, titanium, phosphorus and other elements. The main usable elements in the mineral are iron and phosphorus, and the content of other elements is low and has no recyclable value.
Ore composition: The iron minerals in the ore are mainly magnetite and ilmenite, with contents of 7.32% and 2.97% respectively, followed by hematite and ilmenite and a small amount of limonite, ilmenite, and ilmenite crystal; sulfur minerals are mainly pyrite and chalcopyrite; non-metallic minerals are mainly potassium (sodium) feldspar, amphibole, biotite and apatite, followed by chlorite, pyroxene, epidote, kaolinite, quartz, carbonate minerals, sericite and rutile, etc.
By analyzing the ore samples of the vanadium-poor titanium magnetite, a crushing-stage grinding iron selection-iron selection tailings flotation phosphorus selection process was designed for it. The specific process is as follows:
The crushing process adopts a three-stage closed-circuit crushing and dry separation process, with a gyratory crusher for coarse crushing, two cone crushers for medium crushing, two high-pressure roller mills for fine crushing, four heavy-duty double-layer circular vibrating screens for primary screening, eight heavy-duty double-layer circular vibrating screens for secondary screening, and eight dry separation machines for dry separation.
Phosphorus-containing high-poor vanadium-titanium magnetite stage grinding iron selection process adopts stage grinding and stage separation process, two-stage grinding and three-time magnetic separation washing machine selection. The first stage grinding is 3 MQG3660 ball mills, the second stage grinding is 3 MQY2760 ball mills, the first stage magnetic separation is 9 CTB1230 magnetic separators, the second stage magnetic separation is 3 NCT1030 magnetic separators, the third stage magnetic separation is 4 CTB1024 magnetic separators, and the concentrating is 2 CHCXJ2600 washing machines, and finally the iron concentrate with a grade of 63.2% is obtained.
This stage is to flotate the tailings after magnetic separation for phosphorus selection, using a 1 roughing 1 scavenging 3 fine flotation process. Among them, the flotation roughing is 10 KYF50 flotation machines, the scavenging is 6 XCF50 flotation machines, and the fine selection is 12 XCF20 and KYF20 flotation machines, and finally a phosphorus concentrate with a grade of 33.2% is obtained.
The above is an introduction to a certain phosphorus-containing high-poor vanadium-titanium magnetite beneficiation process scheme. In the actual beneficiation process, since the composition of each ore is different, the beneficiation method cannot be blindly selected, but must be determined according to the characteristics of the ore itself. Therefore, it is recommended to conduct a beneficiation test analysis first, and design a suitable and reasonable beneficiation process plan for the poor vanadium-titanium magnetite through test analysis. At the same time, the appropriate beneficiation equipment can be determined according to the process plan.
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