Bernick Lake Antimony Concentrator

The Bernic Lake Mine is located in Lake Bernic, Manitoba, Canada. It is a large-scale lithium , strontium , strontium , strontium, and strontium pegmatite deposit. There are nine ore belts, including two antimony belts and one lithium belt. Currently, the antimony belt is mined. Grade ore containing Ta ₂ O ₅ 0.13%, tantalum ore minerals are manganese tantalum tin, iron ore weight tantalum, tantalum baddeleyite, tantalum, tin, antimony, tantalum, niobium, microlite. It is currently the main production base of the world's raw materials.

Beneficiation plant scale of 830 tons / day, three-stage closed-circuit crushing re-election for a closed-circuit grinding ore - flotation process. The ore (330 mm) is crushed to -9.5 mm by a jaw crusher , a standard cone crusher , a short-head cone crusher, and is fed into a 2.5 mm Taylor sieve. The material on the sieve is sent to a ball mill . The ball mill discharge and the AC sieve constitute a closed circuit. . Less than 2.5 mm material passes through a 210 micron Derrick three-way feed screen. More than 210 micro-materials are selected by 7 φ600 mm double-headed spiral concentrators, and one spiral concentrator is selected. The spiral concentrate is selected by a shaker, the spiral tailings are passed through a 300 micron DSM sieve, and the material larger than 300 microns is returned to the ball mill. The less than 300 micron material is fed into a φ150 mm secondary desilting cyclone.

The less than 210 micron material is fed into the φ150 micron primary de-slect cyclone to remove the fine mud below 20 microns, and the bottom stream of the cyclone is roughly selected by the Dest three-layer hanging ore shaker, selected by the selected shaker, shaken The bed mine is fed into the φ150 mm secondary dehumidification cyclone, the cyclone overflows into the φ50 mm cyclone to remove mud (-7 microns), and the cyclone bottom flow is fed to the second Derrick screen and the sieve material. (+40 microns) to the coil loop scavenging, the undersize material (-40 microns) and concentrated to the machine, concentrator grit with alkyl sulfosuccinates as collector, sodium silicate, and oxalic acid as modifier, The flocide minerals are floated under the conditions of pH 2~3, the flotation concentrate is selected by the Holman shaker-cross-flow belt chute, the shaker tailings is subjected to secondary flotation, and the flotation concentrate is used with the second cross-flow belt chute. Select the antimony concentrate. Production index, tantalum concentrate grade (Ta2O5) 38.55%, recovery rate of 73%. The flow is shown in Figure 1.

Figure 1 Process of the Berner Lake antimony ore dressing plant

The tailings are treated with lime and a starter and then sent to the tailings for storage. The plant has a Mintek slurry current-carrying analyzer and an electronic computer. The Ta ₂ O ₅ content is measured simultaneously every five minutes for the tailings of the seven operations. The analysis results are reported by the computer to notify the operator to adjust the process parameters in time. Thereby ensuring the best production conditions.