Experimental method for studying the reaction of fine ore in motion

Abstract

The invention relates to an experimental method for studying the reaction of fine ore in motion. The method comprises the following steps of: S1. adjusting the position of a discharge port of a feed pipe and a collecting port of a collecting pipe in a reactor pipe to obtain the temperature distribution of a number of quasi-constant temperature zones, then according to the experimental requirements, selecting constant temperature zones and the position of the discharge port of the feed pipe and the feed-collecting port of the feed-collecting pipe that the constant temperature zones correspond to; S2. According to the needs, adjusting the position of the discharge port of the feed pipe and / or the feed-collecting port of the feed-collecting pipe in the reactor pipe,so as to set the temperature, length and / or temperature error of the constant temperature zones; and S3. ensuring the fine ore is reacted in the constant temperature zones. The experimental method for studying the reaction of fine ore in motion has the advantages of implementing all reactions of fine ore in the constant temperature zones, and making the temperature difference of the constant temperature zones smaller through adjustment and selection.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to an experimental method 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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