Experiment apparatus used for researching reaction of fine ore during motion

Abstract

The invention relates to an experiment apparatus used for researching reaction of fine ore during motion. The experiment apparatus comprises a tubular vertical furnace, a reacting furnace pipe is arranged in a hearth of the tubular vertical furnace, a filling tube is stretched into the reacting furnace pipe from the top of the tubular vertical furnace in a slide and sealing mode, a discharge hatch is movable at the position in the reacting furnace pipe; a material receiving pipe is stretched into the bottom of the tubular vertical furnace in the slide and sealing mode, a material receiving port is movable at the position in the reacting furnace pipe; a constant-temperature area with adjustable position and / or length is provided between the discharge hatch and the material receiving port, the ore powder is introduced into the constant-temperature area through the discharge hatch of the filling tube, and then is introduced into the material receiving pipe through the material receiving port after being reacted. The ore powder is subjected to a reaction during a movement process in the constant-temperature area, the temperature difference of the constant-temperature area is little through adjustment and selection.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to an experimental device for studying the reaction of fine ore in motion. Background technique [0002] Due to the natural fragility of most iron ores, a large amount of fine ore is often produced during the mining, crushing and screening of iron ore. Therefore, fine ore accounts for a large proportion of the iron ore in the world. Big. In addition, for some low-grade iron ores, in the smelting process, they will also be first made into fine ore. For example, some low-grade iron ores found in China, North America and Russia need to be crushed into fine powder first, and then go through the beneficiation process to obtain concentrate particles with acceptable grade levels. The obtained concentrate particles generally have a size of less than 0.15 mm. [0003] In the traditional ironmaking process, powdered ore needs to be sintered or pelletized to be processed into large-sized...

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Problems solved by technology

Among them, the first two methods cannot avoid the bonding phenomenon of fine ore particles at high temperature, while the tubular dripping furnace method avoids the mutual bonding of molten fine ore particles by flying a small amount of fine ore through the constant temperature zone.

But the application of tube dripping brings another problem at the same time: how to get a constant temperature zone with small temperature difference

The former tube-type dripping furnace has a relatively low temperature and a large temperature difference between the parts above the constant temperature zone and below the constant temperature zone in the furnace, so it has a greater impact on the research results of the isothermal method; although the latter one uses water-cooled feeding tubes and water-cooled +Air-cooled feed pipe prevents fine ore from reacting in the uneven temperature area at both ends of the furnace, but the water-cooled equipment takes away a lot of heat in the furnace, especially due to the high cooling intensity of water-cooled+air-cooled feed pipe, close to The temperature at the upper end of the water-cooled + air-cooled feed pipe is much lower than when the water-cooled + air-cooled feed pipe is not used. Therefore, there is still a very large temperature difference in the constant temperature area in this set of equipment, which has great influence on the accuracy of the experimental results. big impact

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