The deposit is one of the most promising deposits for industrial development applications. It is a large iron-titanium mineral - rutile - zircon Shi Haibin sand deposits. The main material composition of the ore is:
1. Heavy metal minerals have very small particle sizes (less than 0.09 mm).
Second, the coarse metal grade has a low content of rare metal minerals, while the phosphorus rock has a high concentration.
Third, the ore minerals are complicated, in addition to the valuable mineral ore and silica, there are garnet, kyanite, glauconite, chromite, epidote, feldspar, staurolite, monazite, secondary Raw phosphates, clay minerals, hornblende and pyroxene are present.
4. The epigenetic alteration of minerals is more developed: the ilmenite of ilmenite; the deposition on the surface of metal mineral particles forms a thin layer of clay, iron hydroxide, secondary phosphate, etc., which shrinks between minerals. The difference in physical properties brings difficulties to the beneficiation separation process.
5. The presence of high levels of impurities (Cr 2 O 3 , P 2 O 5 and SiO 2 ) which are harmful to titanium products in metallic minerals. They enter the mineral structure in the form of isomorphism or are present on the surface of the mineral as a film.
Due to the above-mentioned compositional characteristics of the ore, a rather complicated problem faced by the ore dressing worker is to obtain a high-recovery commodity concentrate from a poorer, multi-component refractory ore.
The deposit was discovered in the 1950s. At that time, many research institutes proposed different process plans. The Russian Institute of Rare Metals has developed a process specification for technical and economic evaluation. The recommended beneficiation process for treating such sands is quite complex and includes the following processes.
The original ore is disintegrated, de-sludged and sieved (mesh size 2mm). The coarse-grained grade is fed into the process of obtaining the phosphate concentrate, the overflow is discharged into the tailings field, and the medium-grained cone-type sorting machine is selected to obtain the coarse concentrate and the abandoned quartz tailings. The coarse concentrate is sieved, the +0.5mm fraction is enriched with phosphate minerals, and the -0.5+0.044mm fraction is sequentially treated with 5% NaOH and 5% HNO 3 solution to be immersed to cover the surface of the metal mineral particles. Secondary phosphate film. The resulting solution containing nitrogen and phosphorus can be used as a liquid fertilizer. Next, the phosphorus-removed coarse concentrate is treated by magnetic separation to be divided into two products: ilmenite products and rutile-zircon products. The selection process for ilmenite products includes the separation of ilmenite from the non-metallic minerals by electrical selection. Separation of non-metallic minerals with larger particle size from ilmenite products by sieving method (mesh size 0.18 mm), and separation of products with higher Cr 2 O 3 grade (ilmenite products) and Cr by shaker 2 O 3 grade lower product (ilmenite-white titanium product). The ilmenite product is subjected to reduction roasting and further magnetic separation to obtain a chromium-depleted ilmenite concentrate. Repeated electrification at a higher voltage to obtain a non-conducting garnet product.
The selection process of kyanite-rutile-zircon products in coarse concentrates is more complicated. It includes: selecting non-magnetic products by shaker, removing +0.125mm grain-grade non-metallic minerals by sieving, and selecting by electrolysis. Rutile products and zircon products. The rutile product is then magnetically separated into a white titanium concentrate and a rutile concentrate.
The non-conductor component enriched with zircon is sorted by a shaker to remove the light mineral, and the heavy mineral impurities are removed by electroporation. The radioactive halo is then used to remove the radioactive monazite from the zircon concentrate. The kyanite concentrate is separated from the intermediate product of the zircon re-election by a process consisting of a shaker, electrification and magnetic separation.
The process is characterized by multiple processes: 5 reselections, 5 magnetic separations, and 6 electrical selections. The total products obtained are ilmenite concentrate, rutile concentrate, zircon concentrate and garnet products and kyanite products. The content of the main useful components of all concentrates meets the process requirements, but none of the restricted impurities (Si, Cr, P) content fully meets the established standards.
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