CGM Online

 In order to make the electrode work normally at very high temperature in the electric arc furnace, the electrode itself needs to have good conductivity, oxidation resistance and thermal shock resistance. Only the electrode paste produced with carbon raw materials can meet the harsh smelting requirements under continuous arc light high temperature of more than 3000 degrees. Therefore, the electrode paste occupies a very important position in the above ore thermoelectric furnace, so it is called the "heart" of this kind of electric furnace.

 The following points should be paid attention to when installing the electrode paste airtight paste: 1. Do not allow debris to enter the electrode 2. Proper paste height 3. Work harder 4. Appropriate temperature 5. Prevent overhang Before filling, the electrode paste should be broken, generally broken into small pieces of 80~100mm, so that the electrode paste block can pass between the two ribs smoothly. If the particle size is too large, the electrode paste suspension failure is likely to occur; if the particle size is too small, it is easy to cause the phenomenon of spraying. Use a forklift truck or special tools to transport the electrode paste to the calcium carbide furnace, and use an electric hoist to hoist the electrode paste into the electrode bucket. Pay attention to the safety of hoisting during loading. When installing electrode paste, be careful not to scatter the electrode paste on the equipment outside the electrode barrel, so as to avoid accidents of electric fire. Ever

Feeding, power distribution and material level management during the start-up process of the silicon-aluminum-iron alloy electrode paste electric arc furnace Feeding After the electrode paste electric furnace is completed, start to gradually add materials to the furnace. During the opening of the furnace, all activities, whether it is feeding, level management, or power distribution, must be carried out around raising the furnace temperature. For the first feeding, the three electrode columns must be buried, and the feeding amount is large. Therefore, the raw materials are mixed evenly, and the feeding should be evenly thrown around the click. Partial feeding is strictly prohibited. The material level management should be in place in time, and the material should be discharged in time according to the smelting situation. Since the furnace temperature is low when the furnace is turned on, it is most likely to cause three-phase disconnection, which will cause difficulties for the firs

Raw materials analysis and market conditions of nickel-iron submerged arc furnace using high-standard closed paste electrode paste The domestic nickel oxide ore resources are extremely limited. At present, the domestic laterite resources for the production of nickel pig iron and ferronickel with high-standard airtight electric furnaces come from South Pacific island countries such as Indonesia and the Philippines. Enterprises purchase nickel ore from the market according to suitable production processes and equipment conditions. Laterite Dewatering The purchased laterite ore usually contains about 33% of the physical water and crystal water. It is extremely uneconomical to directly charge nickel ore into a high-standard closed paste electric furnace to smelt ferronickel. Inefficient and useless to use large amounts of heat. At present, the domestic enterprises engaged in smelting ferronickel with electrode paste electric furnaces almost all dry laterite ore. It is more economical

It is more difficult to smelt silicon-aluminum-ferroalloy in a closed electrode paste submerged arc furnace, and only a good start can make the future smelting road smoother. Therefore, adequate preparation, high-quality raw materials, careful operation, and excellent technology are all necessary guarantees for opening the furnace. The ferrosilicon-aluminum alloy produced by the submerged thermal method, as a steelmaking deoxidizer, has been gradually recognized by major steel mills and more and more manufacturers because of its good deoxidizing effect and can effectively reduce steelmaking costs. At present, the types of furnaces for the production of ferrosilicon-aluminum alloys are mostly concentrated in the range of 1800KVa to 6300kVA. Its production capacity accounts for more than 80% of all submerged arc furnaces producing silicon-aluminum-ferroalloys, and its smelting technology in small furnaces is also becoming more mature. However, the rise in electricity prices and the pre

 According to the quality requirements, raw materials and process conditions of the products, the cathode carbon blocks in China are basically divided into three categories: ordinary cathode carbon block, semi graphite carbon block and graphite carbon block. Anthracite calcined at 1250 ~ 1350 ℃ is the main raw material of common cathode carbon block. The semi graphite carbon block can be divided into two types according to different production processes. One is to use high-quality high-temperature electric calcined anthracite, or to use more graphite fragments or even all graphite fragments as aggregate. The formed green products are only roasted (the roasting temperature does not exceed 1200 ℃) and no longer enter the graphitization furnace for heat treatment. This kind of carbon block is called semi graphite carbon block. The other uses more easily graphitized coke as aggregate, raw products are roasted and then put into graphitization furnace for heat treatment at 180