Roller method treatment process suitable for total steel slag treatment and treatment device

Abstract

The invention discloses a roller method treatment process suitable for total steel slag treatment and a treatment device. The treatment process comprises the following steps: (1) a slag tank with slagis tightly held and shifted to a slag inlet position through a slag tank tilting mechanism; and the slag tank is tilted to pour out the slag with good fluidity into a rotating roller device by a feeding chute to realize the roller treatment; (2) when the slag in the slag tank cannot flow out due to no fluidity, high-viscosity slag and solid-state slag is pulled into the roller device by using a slag pulling machine; and (3) the slag at the bottom of the tank is poured into the roller device through tilting the slag tank by a large angle to realize the total steel slag treatment of the same roller device. The treatment device comprises a feeding system, the roller device (5), a slag particle conveying and storage system (7), a tail gas discharge and purification system (6), a cooling watercirculating system (8), a cold steel cleaning mechanism (10) and an electric control system (9); and the feeding system comprises the slag tank tilting mechanism (1), the slag tank (2), the slag (3)and the slag pulling machine (4).

Description

technical field [0001] The invention relates to a metallurgical slag treatment method and device, in particular to a drum method treatment process and a treatment device suitable for the treatment of all steel slag. Background technique [0002] Steel slag is one of the bulk by-products produced in the steel production process, accounting for about 10-30% of crude steel output; steel slag is mainly composed of calcium, magnesium, silicon, aluminum, iron and other metal oxides and phosphorus, sulfur non-metallic oxides and A complex mixture of various high-melting point polymers, mixed with 1-10% metallic iron with different particle sizes; the temperature of the steel slag just out of the furnace is as high as 1500 °C, most of which are in a molten state and have certain fluidity, but As the temperature drops, the viscosity of steel slag rises rapidly and releases a lot of heat. Due to the differences in the steelmaking process of each steel plant, the composition and tempe...

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Problems solved by technology

[0004] Chinese patents CN200420107540.1 and CN200810207918.8 propose an "inclined drum method metallurgical slag treatment device" and "inclined drum method high temperature slag treatment process and device", which mainly involve the body structure of the drum and a certain fluidity The molten slag is rapidly cooled by multi-media in the drum, crushed and transported out of the device. For the solid slag that does not have fluidity, especially the large tank bottom slag, this type of drum device cannot handle it.

CN200910050400.2 and WO 2012 / 024835 disclose a treatment method and device for high-temperature solid steel slag (tank bottom slag), by installing a large-capacity feed cylinder with a feed inlet in front of the existing working cylinder , using the buffering effect of the feeding cylinder to realize the one-time buckling of the tank bottom slag and the gradual processing function. In view of the structural limitations of the device, it is only suitable for processing the massive steel slag of the tank bottom slag type.

Chinese patent 99244833.6 discloses a replaceable slag receiving chute for a drum slag processing device lined with refractory materials. Chinese patent 201120266445.6 discloses a rotating funnel, which to a certain extent slows down the problem of high-temperature slag sticking and clogging the chute wall , but such a chute or funnel is only suitable for continuous and controllable slag feeding, in other words, due to the limitation of slag feeding diameter, this type of feeding chute or funnel is only suitable for small flow of slag flow or slag removal

CN201210197124.4, CN201310350518.3, CN02266663.X and CN200820151424.8 introduced schemes and devices for introducing massive solid steel slag into the drum from multiple angles; For the feed hopper, the side wall of the funnel is reinforced by setting radial ribs and axial ribs on the outside of the feed hopper, and a crushing frame is set up inside the funnel to pre-break the large steel slag to achieve the buffer function. The method and device can only be used in conjunction with the solid slag treatment drum device, and are used for the treatment of large solid steel slag, and cannot take into account the treatment of fluid slag

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