Novel wet-type strong-magnetic pre-separation process of weak-magnetic low-grade iron mineral roller mill
A technology for low-grade iron minerals, applied in the field of magnetite beneficiation, can solve problems such as not being widely promoted and applied, limited quality improvement ability, and difficult management, so as to reduce operation and maintenance costs, increase processing capacity, and reduce energy consumption. consumption effect
Active Publication Date: 2011-11-02
ANSTEEL GRP MINING CO LTD
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Problems solved by technology
Coarse-grained permanent magnet roller-type strong magnetic separator belongs to dry pre-selection technology. Its processing capacity is small, its quality improvement ability is limited, and its management is difficult. It has not been widely used.
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[0018] The specific implementation manner of the present invention will be described below in conjunction with the accompanying drawings.
[0019] Such as figure 1 As shown, the new process of weak magnetic low-grade iron mineral roller mill strong magnetic wet type pre-selection of the present invention is characterized in that: the raw ore is crushed by a high-pressure roller mill and pre-selected by a wet strong magnetic separator, and 20-30% of the non-magnetic Minerals, improving the grade of the ball mill, is specifically achieved by the following steps:
[0020] (1) The ore produced from the stope with a particle size of less than 1000mm undergoes coarse crushing, medium crushing, fine crushing, and screening operations, and the ore particle size reaches less than 35mm.
[0021] (2) The product 1 of the crushing operation with a particle size of less than 35mm is first fed into the pre-selection storage bin 2, and the crushed product 1 of the storage bin 2 enters the h...
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Abstract
The invention relates to the technical field of magnetite mineral separation, in particular to a novel wet-type strong-magnetic pre-separation process of a weak-magnetic low-grade iron mineral roller mill, which is realized by the following steps of: subjecting mineral separation coarse breaking, medium breaking, fine breaking and sieving operations to ores produced from a stope through excavation; feeding products obtained through fine breaking operation into a high-pressure roller mill for ore breaking; feeding products of the high-pressure roller mill to a roller mill for sieving; returning oversize products to the high-pressure roller mill for re-breaking; feeding undersize products for weak magnetic separation so that concentrate obtained through the weak magnetic separation becomes pre-separated concentrate; feeding tailings from the weak magnetic separation for strong magnetic separation so that concentrate obtained through strong magnetic separation becomes pre-separated concentrate and tailings subjected to the strong magnetic separation are final tailings; and mixing the concentrate obtained through the weak magnetic separation with the concentrate obtained through the strong magnetic separation to obtain raw ores of a ball grinding mill so that the tailings obtained through the strong magnetic separation become the final coarse grain-size tailings. By adopting the novel wet-type strong-magnetic pre-separation process of the weak-magnetic low-grade iron mineral roller mill in a mineral separation plant, the energy consumption can be reduced by 20-30 percent and the processing capacity is improved by 30-40 percent.
Description
technical field [0001] The invention relates to the technical field of magnetite beneficiation, in particular to a new process for pre-selection of weakly magnetic and low-grade iron ore by roller mill and strong magnetic wet type. Background technique [0002] The pre-selection technology of raw ore is a very effective measure to improve the grade of raw ore, reduce the energy consumption of grinding and improve the economic benefits of ore dressing. The majority of mineral processing workers have been making unremitting efforts to realize the maximization of raw ore feeding and selected grade. Before 2000, Due to the limitation of the capacity of mineral processing equipment such as crushers and magnetic separators, only raw ore pre-selection technologies such as dry pre-selection and wet pre-selection of strong magnetic iron ore products have been widely used in magnetite processing plants. The domestic weak magnetic iron ore pre-selection technology was first used in Mei...
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IPC IPC(8): B03B7/00
Inventor 韦锦华周惠文孙雷达
Owner ANSTEEL GRP MINING CO LTD
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