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Drying furnace of metallization ball and drying method thereof

A technology of metallized pellets and drying furnaces, applied in drying, dryers, furnaces, etc., can solve the problems of pellet fragmentation and limited production efficiency, and achieve cost saving, good replaceability, and drying high efficiency effect

Inactive Publication Date: 2008-03-05
大连熔融还原设备制造有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

To dry the pellets with high water content, since the pellets are heated externally, there are strict requirements on the drying speed. If the drying speed is too fast, the pellets will be broken. This limits the production efficiency of pellet processing equipment to produce pellets. Therefore, drying pellets has always been the direction of efforts in this industry.

Method used

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  • Drying furnace of metallization ball and drying method thereof
  • Drying furnace of metallization ball and drying method thereof

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Embodiment Construction

[0035] Now in conjunction with accompanying drawing, the present invention is further described as follows:

[0036] As shown in Fig. 1 and Fig. 2, the drying furnace of the metallized pellets has an annular furnace body and an annular furnace bottom, and the inner side of the furnace body is lined with an insulating material, so that the sides and the upper part of the furnace body are closed. The upper part of the furnace body is equipped with a bellows, the lower part of the furnace body is matched with the annular furnace bottom, sealed with sand, and equipped with a windshield;

[0037] The annular furnace bottom constitutes an annular gas outlet box, steel grids are placed on the top of the furnace bottom, the inner ring side wall of the furnace bottom is connected with the rotating flue, and the bottom of the furnace bottom is fixedly connected with two sets of coaxial box-shaped steel boxes with different radii. Structural support beams, ring-shaped tracks are fixedly ...

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Abstract

The invention relates to a metallized pellet drying furnace and drying method. Its drying heating source is rotary hearth furnace flue gas; the temperature of flue gas is 300-350 degrees centigrade. The drying process is following: putting the pellets uniformly on steel grid by distributing device; starting driving system; support wheel group rotating; matched rail, box-shape support beam connected with the rail and ring shaped hearth rotating together around central shaft, the steel grid rotating synchronically along with the hearth; the said flue gas entering into air box via.

Description

technical field [0001] The invention relates to a drying equipment for the iron and steel industry, in particular to a drying furnace for metallized pellets. Background technique [0002] Pellet drying is an intermediate operation before entering the rotary hearth furnace for the smelting reduction stage. The purpose is to enable the dried pellets to safely withstand the temperature stress during the preheating phase of the rotary hearth furnace. The pellets added with bentonite contain 10%-15% water. On the one hand, these moisture can lead to plastic deformation of the pellets, and on the other hand, due to the influence of the "cracking temperature" (generally 400-450°C) of the pellets, it will cause cracks in the preheating stage (preheating temperature is higher than 900°C). or "burst". Therefore, before the pellets enter the smelting reduction stage, drying must be carried out to make the moisture content below 3%, so as to meet the requirements of the process. [...

Claims

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Application Information

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IPC IPC(8): F26B17/32F26B3/06
Inventor 张宜平赵国顺徐绍德
Owner 大连熔融还原设备制造有限公司
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