High-water content and high-powder-containing lump ore high-efficiency powder removal method and device for realizing the powder removal method

Abstract

The invention discloses a high-water-content and high-powder-content lump ore effective powder removing method and a device for achieving the same. The high-water-content and high-powder-content lump ore effective powder removing method is characterized in that the feature that lump ores are low in viscosity after being wetted is utilized, and high-water-content and high-powder-content lump ores are wetted and then are subjected to two-stage screening through a double-layer screen to remove powder in the lump ores. The device for achieving the high-water-content and high-powder-content lump ore effective powder removing method comprises a double-layer vibration screen, an incoming material rubber belt used for conveying the lump ores, a feeding rubber belt used for conveying the lump ores to the double-layer vibration screen for screening and a water spraying system arranged on the upper potion of the feeding rubber belt and used for spraying water on the lump ores and wetting the lump ores transferred to the feeding rubber belt from the incoming material rubber belt. Conveying rubber belts used for conveying oversize are arranged at the side end of an upper layer screen of the double-layer vibration screen and the side end of a lower layer screen of the double-layer vibration screen respectively. An ore pulp collection hopper used for collecting undersize of the lower layer screen and a ceramic filter used for dewatering of ore pulp in the ore pulp collection hopper are sequentially arranged at the bottom of the lower layer screen of the double-layer vibration screen. According to the high-water-content and high-powder-content lump ore effective powder removing method and the device, screening is performed through the double-layer screen in a wetting method, operation is simple, and the screening efficiency is high.

Description

technical field [0001] The invention relates to the field of metallurgical mine engineering, in particular to a method for efficiently removing powder from lump ore with high water content and high powder content and a device for realizing the powder removal method. Background technique [0002] With the changes in the iron ore resource market and the requirements for ironmaking cost control, the demand for 8-25mm lump iron ore (hereinafter referred to as lump ore) in iron and steel enterprises continues to rise. However, the texture of imported lump ore is relatively soft, the transportation distance is long, and the number of unlucky shipments is frequent. When the lump ore reaches the user, the powder content is generally around 25%, and the highest is 35%. [0003] At present, domestic iron and steel enterprises basically use vibrating screens to directly sieve lump ore, the oversized material is smelted in the blast furnace, and the undersized material is returned to si...

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Problems solved by technology

In order to reduce the powder content of the lump ore in the rainy season, domestic iron and steel enterprises also use water washing to wash the lump ore. For example, Jinan Iron and Steel Co., Ltd. has established a set of off-line jigging method water washing and grading treatment system for the lump ore with high fine slime content. The washing time is long, the processing capacity is relatively small, the water consumption and sewage treatment volume are large, and the operating cost is relatively high

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