I. Overview

Ukrainian titanium ore field is located in the territory of Hainan Island, it is one of the main production of factories, mines and beach placer. The mining area mined by the mine has large reserves and good mining conditions. The technical level and equipment of the mining plant are in the leading position in the mine of China's coastal sand mine production plant; the process and equipment of the selected plant are also relatively perfect, and the comprehensive recycling effect is better.

The mine began its geological survey in 1958, completed geological exploration in 1959, and began mining at the same time. From 1965, the state-owned mine was established, and the selected plant was built at the end of 1950; the selected plant was expanded in 1971; the mining and plucking process of the water-collecting and jigging process was completed in 1967, and it was not officially put into production; and it was adopted in 78 years. Push the machine with water gun mining, 10.10 cm (4 inches) sand pump transport, shaker sorting production. In 1982, it began to use dry mining, dry transportation and mobile mining and selection equipment with conical concentrators as the main equipment for production.

2. Geological overview and ore properties

Wu perovskite field current Mining Area genus Baoding mine, located between Datangpo Ridge to deposit Miaoling cattle, is oriented along a titanium-containing iron ore and zircon and associated with a shoreline profile integrated more valuable minerals Sexual seaside sand deposit. The igneous rocks in the mining area are less exposed, belonging to the coastal landform, and the Tertiary Geology is mainly composed of marine sediments. The total length of the ore body is 18 kilometers, the average width is 230 meters, and the average thickness of the ore body above sea level is 9.5 meters. The ore body is exposed to the surface, which is sand-like and has no cover. The ore has a uniform particle size, a small amount of mud, and good mining conditions.

The useful minerals in the ore are mainly ilmenite and zircon. The ratio of the two is ilmenite: zircon 10:19:1. In addition to the main useful minerals, but also associated monazite, rutile, cassiterite, magnetite and trace amounts of gold and other valuable minerals can be integrated recycling. The gangue mineral is mainly quartz , and the rest is a small amount of feldspar and mica , and its total amount accounts for about 97% of the total mineral content of the original ore. Because the ore has uniform particle size, no pebbles, coarse and fine mud content, most of the useful minerals are present in the monomer, and there is a significant difference in density between the useful mineral and the gangue mineral, so the selectivity is better. The ore analysis, screening analysis and mineral amount analysis of the ore in this mining area are shown in Table 1, Table 2 and Table 3, respectively.

Table 1 List of raw ore analysis results

Table 2 Raw ore screening analysis table

Table 3 Analysis of mineral ore minerals

Third, the selection process and technical and economic indicators

(1) Mining and selection plant

Wuchang Titanium Mining and Separation Plant is produced by a complete set of mobile mining and selection equipment. The complete set was built in 1981 and put into production in 1982. The whole set consists of three parts: the mining and transportation system, the storage and ore buffer system and the mobile selection plant.

The mining adopts the 69-4 bucket wheel excavator for dry mining. The mining process is simple, the operation is continuous, the recovery rate is high, the control is convenient, and the production cost is low. The mining method adopts the front-end working face method, the mining face width is 15 meters, the production capacity is 100 tons/hour, the bucket wheel diameter is 1.6 meters, 9 buckets, each bucket volume is 11 liters, and the total installed power of the bucket wheel excavator is 33 kilowatts, with a total weight of 13 tons. The mining unit consumes 0.25 kilowatt-hours per ton of raw ore, which is about water. .

The mining machine is equipped with two 45-meter mobile belt conveyors for continuous transportation. The bucket turbine is matched with two 45-meter belt conveyors. Each mining cycle can be selected to be 15 meters wide and 200 meters long. During this period, the mine silo and the selection plant do not need to be moved. Depending on the thickness of the mining, the mining landscape can be approximately 2,850 meters per cycle.

The mobile mining bin consists of a feeding belt conveyor, a mining bin, a disc feeder and a crawler type mobile device. The 45-meter belt conveyor rice mine is fed into the 55 ^m3 mine silo through the mine bin conveyor belt, and its buffer capacity is 55 minutes. A φ2 meter disc is placed at the bottom of the mine bin to feed the mine to control the amount of ore. The DZB-2A electronic belt scale is installed on the mine belt conveyor of the mine to the mobile plant for the detection and recording of the ore.

The mine bins are sent to the mobile selection plant for farewell. The mobile plant is self-moving for the motor-driven crawler. The selection of the chassis area is 5 meters wide and 8 meters long. The total height is 11 meters, the total weight is about 26 tons, and the walking speed is 0.9 km/h. When positioning work, there are four auxiliary support feet fixed. The mobile selection plant is divided into two layers, the lower layer is a two-meter high working room, equipped with a driving platform, sand pump, electrical control equipment, etc.; the upper floor is an open platform with a beveled screen, a conical concentrator, and a spiral chute. And pulp concentration analyzer and other equipment. Cone Concentrator This machine is equipped with a four-layer operating platform, and the spiral chute has a two-layer working platform.

The dry ore is selected into the plant, first adding water to form a high concentration of pulp, and the concentration of the slurry is 70% to 72%. The slurry flows to a five-in-one 500×1000 mm beveled screen for screening. The +1.2 mm screen product includes foreign materials such as coarse sand, shells and weeds, which are discarded as tailings. 6.35 cm (2 Inch) PS sand pump is sent to the cone concentrator for rough selection. A QN-I type concentration meter is installed on the ore concentrator feeding tube for concentration detection and recording. The raw ore is discarded by the cone concentrator, and the tailings are discarded by the sand pump. The sand pump is sent to the gob in the goaf. The middle mine is returned to the second section of the machine for re-election; the concentrate is sent to the spiral chute for selection. The spiral chute selection is carried out in two stages. A selected spiral chute concentrate is selected for the second-stage spiral chute; the middle mine is returned to the cone concentrator for re-election and the tailings are discarded. The second-stage selected spiral chute concentrate is the final concentrate of the mining plant; the middle mine is returned to the spiral chute for re-election; the tailings are returned to a selected spiral chute for re-election. The panorama of the mining plant, the appearance of the mobile plant, the equipment connection diagram and the internal flow chart of the cone concentrator are shown in Figure 1, Figure 2, Figure 3, Figure 4, and the equipment used is shown in Table 4.

Figure 1 Panorama of the mining plant

Figure 2 Mobile plant appearance

Figure 4 Internal flow chart of cone concentrator

Table 4 New process equipment selection table

Industrial test, trial production of mobile concentrator and production technical indicators from 1982 to 1986 are shown in Table 5. Electricity consumption of mining and dressing plant: 1.79~3.52 kW·hr/ton·original ore; water consumption: 1.5～2.0 tons of xenon·original ore.

Table 5 Mobile concentrating plant production technical indicators

(2) Select Factory

Wuchang Titanium Ore Selection Plant is one of the large-scale beach sand mine selection plants with large scale and perfect process in China. In addition to the production of titanium concentrate, the plant also comprehensively recovers various by-products such as zircon, monazite, rutile and cassiterite. Because the self-sufficiency rate of coarse concentrate is relatively high, the economic benefit is good; the shortage of some coarse concentrates is supplemented by the purchase of soil-produced products.

The plant selects the process, uses the pre-shaker to re-elect the tail, magnetically recovers the ilmenite, and then elects the group, and then separates and purifies it by a combination of strong magnetic separation, electric selection, flotation and re-election. Comprehensive recovery of zircon, monazite, rutile, cassiterite and residual ilmenite. The selection process of the plant is shown in Figure 5. The technical indicators of the selected plants are shown in Table 6.

Figure 5 Process of Wuchang Titanium Concentrate Factory

Table 6 Technical indicators of Wuchang Titanium Mine Selection Plant

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