Method for separating oolitic hematite

Abstract

The invention discloses a method for separating oolitic hematite, and the process of the method comprises discarding tailings of ores by intense magnetic separation through stage grinding and stage separation, and de-phosphorizing and increasing iron to the intense magnetic concentrated by reverse flotation. The intense magnetic separation is functioned of concentrating iron minerals and desliming, thereby preventing smile from influencing flotation. The highly-effective regulator is made from sodium carbonate, sodium silicate and sodium hydroxide, the collecting agent is a composite medicine made from hydroximic acid and alkyl sulfate, and the method for separating oolitic hematite is a key technology for the reverse flotation to further upgrade the concentrate of iron ore. The invention has the advantages of simple technological process, low energy consumption, low cost and good product index, and solves the defects in prior art.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to a hematite ore beneficiation method. Background technique [0002] Iron ore is a non-renewable natural resource. After several years of continuous mining, rich iron ore and easy-to-select poor iron ore will be exhausted, replaced by a large number of "poor, fine, miscellaneous, difficult to grind and difficult to select" " of iron ore. Oolitic hematite is one of them. Oolitic hematite is an important sedimentary iron ore in my country. It has a large proven reserve and is mainly distributed in Hunan, Hubei, Guangxi, Guizhou and other places in China. Due to the fine particle size of the iron minerals, fine grinding is required to dissociate the oolitic nuclei. A large amount of clay minerals associated with the ore are likely to form fine particles and secondary slime during the crushing and grinding process, resulting in the iron Ore belongs to extremely difficult ore. [0003] With ...

AI Technical Summary

Problems solved by technology

Chen Wen et al. (Study on Direct Reduction Magnetic Separation Test of Hezhang Oolitic Hematite in Guizhou, "Metal Mine", 1997, No. 11) conducted a study on the direct reduction magnetic separation process of oolitic hematite in Hezhang, Guizhou , the results of the study show that: the use of fixed bed or external heating fluidized bed method can obtain better separation index, but the cost is too high, and it pollutes the environment; Wang Jing et al. Research "Mining and Metallurgy Engineering", 2004, Volume 24, Issue 3) conducted a preliminary study on the flotation test of Hezhang oolitic hematite in Guizhou, using flotation technology, focusing on the investigation of grinding fineness, NaOH dosage, twelve The influence of the amount of amine and GF on the flotation effect, due to the serious sludge, the separation effect is poor, and the index obtained is not ideal

Looking at the above research techniques and results, none of them have solved the difficult problem of beneficiation of Hezhang oolitic hematite in Guizhou. Due to the fine particle size of the embedded iron minerals, fine grinding is required to dissociate the monomers, and the ore A large number of clay minerals associated with the medium are easy to form fine particles and secondary slime during the crushing and grinding process, which has a serious impact on the separation process.