RU47891U1 - TECHNOLOGICAL LINE FOR THE PRODUCTION OF AGLOMERATE - Google Patents

Abstract

The invention is aimed at increasing the amount of sludge used in the agglomeration of blast furnace and converter gas treatment by reducing the negative impact of sludge on the performance of the pelletizing process, and improving the quality of the sinter. These results are achieved in that the pelletizing of the charge is carried out in 2 stages. The technological line consists of devices for dosing charge components (charge bins, with charge batchers (1, 2)) - iron ore components (ore fines and concentrates), sludge, fluxing additives (limestone, lime), solid fuel; mixing (drum mixers (3)); pelletizing (drum or bowl pelletizing machines (4, 6)); sintering machines (5) for sintering. The processing line further comprises a pelletizer for re-pelletizing the charge after the first pelletizing step.

Description

The utility model relates to ferrous metallurgy, namely to the preparation of raw materials for blast furnace smelting.

A known line for the production of fluxed sinter on sinter machines [1, 2, 3] includes: devices for dispensing charge components (charge bins, charge batchers (1)) - iron ore components (ore fines and concentrates), fluxing additives (limestone, lime ), solid fuel; mixing (drum mixers (3)); pelletizing (drum or bowl pelletizing machines (4)); and sintering machines (5) for sintering.

A disadvantage of the known production line is the formation of large charge granules when fine-dispersed sludges of blast furnace and converter gas purifiers are introduced into the charge, and, accordingly, the sintering conditions and the quality of the sinter are worsened, and the sintering charge cannot be pelletized in two stages.

The objective of the claimed utility model is to provide the possibility of increasing the number of sludge blast furnace and converter gas purification in the sinter charge without compromising the performance of the sintering process and quality of the sinter.

The problem is solved by pelletizing the sinter mixture in 2 stages: stage 1 - pelletizing of all components of the mixture except sludge; Stage 2 - introduction of sludge into the charge and re-pelletizing of the charge.

The essence of the claimed utility model is as follows.

The processing line further comprises a hopper with a dispenser for sludge with a dispenser (2) and a pelletizer for the second pelletizing stage (6).

The technological line works as follows.

In the batch preparation department, the components of the batch for sintering are dosed (from the bins (1)), then the batch is mixed in drum mixers (3) and pelletized in drum or bowl pelletizers (4). Sludges from blast furnace and converter gas purifiers from a separate hopper (2) are metered and fed into the charge after the first pelletizing stage. After this, the mixture is re-pelletized in a drum or bowl pelletizer (6), placed on an agglomeration machine (5) and sintered. Next, the finished sinter is served for shipment to consumers or for further processing (crushing, cooling and sorting).

The advantage of this production line is the possibility of pelletizing the mixture in 2 stages.

Thus, the technical solution fully fulfills the task.

In fig. numbers indicate:

1 - charge silos;

2 - silo hopper;

3 - drum mixer;

4, 6 - drum or bowl pelletizer;

5 - sintering machine;

Sources of information

1. Agglomeration of ore materials. Scientific publication / Korotich V.I., Frolov Yu.A., Bezpronsky G.N. Yekaterinburg: GOU VPO "USTU-UPI", 2003.400 p.

2. Wegman E.F. Ore and concentrate mineralization. - M.: Metallurgy, 1981. - 240 p.

3. E.F. Wegman et al. - metallurgy of cast iron. M: Metallurgy, 1989.

Claims (2)

1. A technological line for the production of sinter, including charge hoppers with charge batchers, a mixer, a pelletizer, an agglomeration machine, characterized in that it further comprises a pelletizer for the second pelletizing stage. 2. The line according to claim 1, characterized in that it contains a separate hopper for sludge, allowing them to be fed into the charge after the first pelletizing stage.