Ultra-large-specification square graphite electrode and preparation method thereof

Abstract

The invention relates to an ultra-large-specification square graphite electrode. The ultra-large-specification square graphite electrode is prepared from a dry material, green scrap, stearic acid and intermediate-temperature modified asphalt according to the weight ratio of 100: 5: 0.2-0.5: 18.5. The dry material consists of mixed coke large particles, medium particles, powder and graphite scrap. The preparation method comprises the following steps: during preparation, pulverizing and sieving the graphite scrap and petroleum coke to obtain particles with different granularity and powder; mixing the sieved graphite scrap with the petroleum coke according to the ratio to obtain the dry material; and then adding the green scrap in the dry material according to the ratio; and pouring the mixture in a blending system and stirring the mixture; and carrying out mixing and kneading, forming, roasting, graphitizing and machining to obtain the finished product. The quality index and the use performance of the produced ultra-large-specification square graphite electrode reach the national standard. The ultra-large-specification square graphite electrode is accepted by consumers when used, and fills a gap of the field of ultra-large-specification square graphite electrodes.

Description

A kind of ultra-large graphite square electrode and preparation method thereof technical field The invention belongs to the technical field of graphite electrode preparation, and in particular relates to a super-large-sized graphite square electrode and a preparation method thereof. Background technique Neither vibration-formed graphite electrodes nor extrusion-formed graphite electrodes can meet the needs of an alloy smelting furnace of an American company. The market needs high-quality 800X900X3500mm ultra-large graphite square electrodes. Due to the limitations of extrusion equipment and process technology, the current domestic There is no manufacturer that can produce 800X900X3500mm ultra-large graphite square electrodes. To meet the technical indicators, the general process is pressing, roasting, graphitization, and machining. The breakthrough of the invention lies in the use of pitch with high coking value, special process and special equipment, the product structure...

AI Technical Summary

Problems solved by technology

Neither vibration-formed graphite electrodes nor extrusion-formed graphite electrodes can meet the needs of an alloy smelting furnace of an American company. The market needs high-quality 800X900X3500mm ultra-large graphite square electrodes. Due to the limitations of extrusion equipment and process technology, the current domestic There is no manufacturer that can produce 800X900X3500mm ultra-large graphite square electrodes. To meet the technical indicators, the general process is pressing, roasting, graphitization, and machining

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