Novel vertical roasting-combined lengthwise graphitization furnace

Abstract

The invention discloses a novel vertical roasting-combined lengthwise graphitization furnace. The furnace comprises a furnace body, wherein a plurality of furnace boxes are arranged in the furnace body side by side. The furnace is characterized in that two adjacent furnace boxes form a power transmission loop. A furnace bottom supporting pier, a cooling water tank, a furnace bottom main conductivecopper plate and a furnace bottom conductive electrode are sequentially arranged at the bottom of each furnace box from bottom to top, an upper conductive electrode, an upper connecting copper conductor and an upper electrode pressing balance weight are sequentially arranged at the top of each furnace box from bottom to top, the upper connecting copper conductor communicates with the upper conductive electrodes of two adjacent furnace boxes, a furnace wall with a discharge flue is arranged between the furnace bottom conductive electrode and the upper conductive electrode, and a wall door is arranged on one face of the front side of the furnace wall with the discharge flue. According to the invention, secondary sintering and graphitization are combined for production, a secondary sinteredproduct does not need to be graphitized after being cooled, a production period is shortened by about 20 days, the process of repeated roasting at a temperature below 850 DEG C is avoided, and a largeamount of energy is saved.

Description

technical field [0001] The invention relates to the technical field of graphitization furnaces, in particular to a novel vertical roasting combined with inner series graphitization furnace. Background technique [0002] High-power and ultra-high-power graphite electrodes are indispensable and important raw materials in electric furnace steelmaking, and play a very important role in national economic production; the production process is batching, kneading, forming, roasting, impregnation, secondary roasting, Graphitization and processing; among them, kneading, roasting, secondary roasting and graphitization processes are typical energy-consuming processes; at present, all high-power and ultra-high-power graphite electrodes must undergo final roasting before entering the graphitization process. [0003] Existing secondary baking and graphitization production equipment for high-power and ultra-high-power graphite electrodes are mainly tunnel kilns and graphitization furnaces; ...

AI Technical Summary

Problems solved by technology

[0006] 1. Secondary baking and graphitization are carried out separately, so that the electrode is repeatedly heated before 850 degrees Celsius, which wastes a lot of energy and time;

[0007] 2. The existing inner series graphitization furnace adopts horizontal type, which occupies a large area;

[0008] 3. The existing technology must use the push cylinder to ensure the normal power transmission of the electrode column, the operation is complicated and the cost is increased;

[0009] 4. Waste of energy. After the existing graphitization furnace bottom is paved, it will not be re-paved for each furnace. The bottom of the furnace will be replaced after a period of operation. , its resistivity is getting smaller and smaller, and part of the electricity will go away from the furnace bottom material during the power transmission process, resulting in waste of electricity;

[0010] 5. The homogeneity of product quality is poor. As mentioned in Article 4, due to the small number of furnace bottom material replacements and the gravity of the upper material, the stacking density of the upper and lower layers of the electrode column has a large gap in density, which is easy to form a furnace bottom bias flow, resulting in There is a temperature difference between the upper and lower layers of the electrode, which affects the homogeneity of the electrode;

[0011] 6. Since a large amount of thermal insulation material needs to be added to the furnace, a multifunctional crane must be used to meet environmental protection requirements and increase investment costs

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