Titanium primary ore dressing plant example - Cang Guihua Titanium Factory

I. Overview

Our Panxi area is a vanadium-titanium magnetic iron ore mineral resources on land, the district titanium porcelain source reserves in the world, accounting for 95.8% of the total reserves of titanium resources. The first phase of the mine was put into operation, the Lanjian Mine, which was started in 1966 and put into operation in 1970. The mining is open-pit mining. The ore dressing adopts the magnetic separation method to select the iron concentrate. As the raw material for iron making and vanadium extraction of Panzhihua Iron and Steel Company, the tailings (magnetic tail) of the concentrator is the selected titanium ore. In order to make full and reasonable use of Panzhihua Titanium resources, since 1977, various units in the country have carried out a lot of scientific research work from various technologies such as titanium, titanium rich materials, titanium white to sponge titanium, and have made great achievements. It laid the foundation for the comprehensive utilization of Panzhihua Titanium. In the selection of titanium, the titanium plant with the nature of the pilot plant was built in 1970, which created conditions for the comprehensive utilization of Panzhihua titanium resources, and also laid the technical foundation for the construction of large-scale titanium plant in the future. The existing titanium plant only performs comprehensive recovery of titanium for some magnetic separation tailings. With the development of titanium industry, Panzhihua will become the main production base of titanium raw materials in China.

Second, the nature of the ore

The Panzhihua Titanium Plant is the magnetic separation tailings of the 1~4 series of the Mindian Concentrator of Panzhihua Mining Company. It generally contains about TiO28%, and the mud content is relatively high, and the content of -0.045mm is 34~39%. The ilmenite inlaid cloth is generally below 0.4 mm in size, and the +0.4 mm TiO2 grade is not high and can be discarded as tailings. The main valuable ore mineral ilmenite, magnetite and titanium followed by a small amount of sulfide such as pyrrhotite; gangue minerals pyroxene, followed plagioclase like. The main chemical composition, particle size composition and main mineral content and properties of the selected titanium plant are shown in Table 1, Table 2 and Table 3.

Table 1 Main chemical components of magnetic separation tailings

Table 2 Magnetic separation tailings particle size composition table, %

(Continued Table 2)

Table 3 Content and properties of main minerals in magnetic separation tailings

Third, mineral processing process and technical indicators

At present, the Panzhihua Titanium Plant adopts the process of re-election and electro-selection. The process is shown in Figure 1.

Figure 1 Titanium production principle process

The densely-selected magnetic separation tailings flowed to the titanium-selecting plant, first entering the slag screening and desliming operation, the screening particle size was 0.4 mm, and the TiO2 content on the sieve was only 2.35-3.80%, which was discarded as tailings. Under the sieve product, the φ9m thickener is de-sludged, the concentrator overflows as tailings, and the underflow enters the hydraulic classifier, which is divided into three levels of 0.4-0.1 mm, 0.1-0.04 mm, and -0.04 mm. The first-stage spiral concentrator is rough-selected, the second-stage spiral chute is selected, and the graded overflow (-0.04 mm) is discarded as tailings. The first-stage and second-level concentrates after the rough-selection and tail-slipping are combined, and then desulfurized by flotation, magnetically removed, and then filtered and dried, and then divided into 0.4-0.1 mm and 0.1-0.04 mm by wind classification. Separate electrification to obtain the finished titanium concentrate, and electrified tailings for final tailings disposal. The technical indicators are shown in Table 4.

Table 4 Selection of titanium production plant technical indicators

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