Independently constructed benefication complete equipment for annually producing bauxite with 200,000 tons

Abstract

The invention relates to independently constructed benefication complete equipment for annually producing bauxite with 200,000 tons. The independently constructed benefication complete equipment is composed of main parts including a computer batching device, a jaw crusher, a belt conveyor, a storage storehouse, a five-hole blanking homogenizing device, a front grinding storehouse, a 1# quantitative belt weigher, a high-pressure double-roller crusher, a six-mesh vibration screen, a hoister, a fine ore storehouse, a 2# quantitative belt weigher, a grinding entering belt, a wet ball mill, a hydrocyclone, an original ore pulp tank, a three-step micro-foam self-circulating floatation selector, a finished ore overflow type pump, a finished ore pulp tank, a finished ore pulp charging pump, a finished ore pulp high-efficiency sedimentation tank, an underflow pump, a high-efficiency energy-conservation filter pressing unit, a finished ore belt conveyor, a finished ore storehouse, a tailing ore pulp pump, a tailing ore pulp high-efficiency sedimentation tank, a tailing ore underflow charging pump, a high-efficiency filter presser, a tailing ore belt conveyor, a front tailing ore storehouse processing pool, a gas-liquid mixing pump, a gas-liquid reaction pipe, a circulation water pool, a circulation water pump and the like. According to the equipment, the benefication efficiency is greatly improved; simultaneously, the loss is also effectively reduced; the whole equipment forms a self-circulating system; and the zero release is realized.

Description

technical field [0001] The invention relates to the field of mineral processing machinery and equipment, in particular to a complete set of bauxite mineral processing equipment with an annual output of 200,000 tons. Background technique [0002] The research literature on bauxite beneficiation technology in my country began in the 1970s. At that time, mineral engineering experts had foreseen the challenges that bauxite resources would face today. The first industrial test of bauxite flotation was carried out in Xiaoguan Aluminum Mine of China Great Wall Aluminum Corporation in 2000, and the first industrial production line was put into operation in 2002 in the grafted alumina production process of Chalco Zhongzhou Branch. In terms of production technology, the first generation of bauxite beneficiation technology is based on the grafted alumina production process, represented by the beneficiation project of Chinalco Zhongzhou Branch, the beneficiation plant of Chinalco Henan ...

AI Technical Summary

Problems solved by technology

[0004] (1) Incomplete ore dissociation

The degree of dissociation of ore is the key link affecting the beneficiation effect. Due to the dense embedding of bauxite diaspore and gangue, dissociation of bauxite needs to grind the ore to below 200 mesh (0.074mm), of which The most suitable particle size for flotation is the particles between 200-400 (0.038mm) mesh. If the particles are too fine, they will dissociate completely, but it will easily cause muddy phenomenon and deteriorate the beneficiation environment. If the particles are too coarse, the dissociation of minerals cannot be achieved. , it is difficult to obtain better beneficiation effect

[0005] (2) It is difficult for coarse-grained and poor conjoined organisms to float

In the process of bauxite slurry flotation, because the surface properties of ore and gangue are relatively close, it is difficult to find a collector with good selectivity to diaspore. , a large amount of gangue will also be collected, so we can only choose a collector with appropriate collection capacity, which has caused the problem of insufficient collection of useful minerals

Because fine-grained minerals have a strong competitive ability to collectors, it is difficult for coarse-grained minerals to compete for collectors, and the collector's ability to collect coarse-grained minerals is reduced, especially for coarse-grained associated ore particles. The collection capacity is even lower, and these minerals are difficult to float up, and can only be discharged from the tailings, resulting in a super high A / S index of the tailings, a decrease in the total recovery rate of ore dressing alumina, and a decrease in the concentrate yield

[0006] (3) Flocculants and sulfate problems

[0007] (4) Problems of ceramic filter and concentrate filtration

The vertical disc filter used for bauxite concentrate filtration has too much water content in the filter concentrate, which is difficult to meet the requirements of industrial production

[0008] (5) The water system cannot be self-contained and needs to be grafted into the alumina production process

[0010] (1) The technical problems existing in Cayman Aluminum’s beneficiation project are tailings thickening, sinking and water balance: the Cayman process needs to mix the flotation foam with the circulating flow and then pump it into the flotation machine again to capture Adding a sufficient amount of collector is easy to cause troughs, and adding insufficient collectors will cause the tailings to run thick; the Cayman beneficiation process is a large parallel full flotation process, the liquid volume balance of the Cayman system is not easy to grasp, and troughs are prone to occur; the water system cannot It is self-contained and needs to be grafted into the alumina production process

[0011] (2) Problems in the mineral processing project of Huiyuan Aluminum: Too many tanks are used, which is only suitable for the construction of small-scale mineral processing plants. For a mineral processing plant with an annual output of 200,000 tons of concentrate, the use of multiple sets of equipment will bring a lot of maintenance and maintenance problems; high energy consumption, only the power consumption of flotation cells and fans is about 1000KW per hour per 200,000 tons of scale, which is equivalent to 50KW per ton of concentrated ore; it occupies a large area and the construction cost is very high

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