Reduced iron powder briquetting device

Abstract

The invention provides a reduced iron powder briquetting device. The reduced iron powder briquetting device according to the present invention includes: a feed box, arranged on the upper part of a pair of rollers, for supplying reduced iron powder supplied by a double screw feeder between the pair of rollers; cheek plates, respectively It is arranged on the side of the pair of rollers to prevent the reduced iron powder from being extruded from the side of the roller due to the pressure of the pair of rollers; and the blocking part is combined with the feed box to block the reduced iron powder The powder is squeezed toward the middle portion of the rollers by the pressure of the pair of rollers.

Description

technical field [0001] The present invention relates to a reduced iron powder briquetting device, and more particularly relates to a reduced iron powder briquetting device, wherein a baffle plate is arranged in a feed box, so that the production capacity of a twin-screw type briquetting device can be obtained, and the The left and right rollers are used as the reference to ensure the supply characteristics similar to the single screw type. Background technique [0002] A smelting reduction ironmaking method has recently been developed as an alternative to the blast furnace method. [0003] This smelting reduction ironmaking method is to produce molten iron by pressing reduced iron powder (DRI: DirectReducedIron: DRI) passing through a fluidized furnace into lump reduced iron (HotCompactedIron: HCI) and then loading it into a melting and gasifier. [0004] That is, pressure is applied to powdery reduced iron powder at a temperature of about 700° C. to 800° C. to make lumpy r...

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Problems solved by technology

[0010] When the plate production is discontinuous during the process, gas is ejected at the center of the roll width, and the reduced iron powder is discharged due to the gas flow rate, causing the density of the reduced iron powder to change instantly in the closed space composed of the screw rod, the cheek plate and the roll. If it is lower than the minimum required amount, press forming cannot be realized, or when more than two screws are used, the pressure applied according to the direction of rotation is different or the phenomenon of inclination to the side is aggravated, and the middle part of the roller is not easy to perform press forming

[0011] Therefore, the twin-screw wide-width type reduced iron powder briquetting device developed to increase the production capacity of the reduced iron powder briquetting device has increased the maximum production capacity, but the possibility of discontinuous production has also increased due to the wide width characteristic.

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