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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

The nickel pig iron base material produced by the nickel-iron electric furnace has made an important contribution to the development of stainless steel. In the production of submerged arc furnaces in 2012, nearly 3.95 million tons of high-grade ferronickel base materials were continuously sent to stainless steel plants, ensuring a substantial increase in stainless steel output by 11.69%. In recent years, TISCO and Baosteel have used nickel metal in the total nickel pig iron, and the market has accounted for 30%-50% of the total nickel metal consumption. The high-standard sealed electrode paste produced by Rongxin Carbon in Gongyi City can ensure the long-term continuous and stable operation of the nickel submerged arc furnace. The physical and chemical indexes of Rongxin Carbon Special Airtight Paste in Gongyi City     project Product name Special paste for ferronickel 1# electrode paste 2# electrode paste 3# electrode paste 4# electrode paste Ash content (%,m/m)≤ 3 4

Build a furnace The main aluminum refractory material is high-alumina brick masonry. Three layers of graphite carbon bricks are built on the bottom of the furnace, and one layer of graphite carbon bricks are built on the walls of the furnace. A layer of electrode paste is knotted at the bottom of the furnace before starting the furnace, with an average thickness of 200mm. Raw material preparation Bauxite Content: AL2O3 55%-90% SIO2 20%-30%. Granularity: 30-120mm Rinse clean Bituminous coal Compared with other alloys in the smelting of silicon-aluminum-iron alloy submerged arc furnace electrode paste smelting, the application of the original agent is the most unique. Among the reducing agents used, bituminous coal accounts for more than 80%. Composition: 15%-25% volatile, less than 20% ash, less than 55% fixed carbon, good slagging performance. Silica In fact, the normal smelting of silicon-aluminum-ferroalloy does not have high requirements for silica. We have used it from 90%

At present, when domestic submerged arc furnaces are used to produce ferrosilicon, manganese and chromium ferroalloys, standard electrode pastes are usually used. With the widespread use of large-capacity submerged arc furnaces and closed electric furnaces, the number of large-scale electric furnaces has continued to increase; and the output of ferroalloys has increased significantly, many silico-manganese alloy submerged arc furnaces are gradually switching to closed electrode pastes. In order to ensure that the self-baking electrode can be sintered early. There are also some silicomanganese alloy manufacturers, which are electric furnace nickel-iron manufacturers. According to the needs of our factory, they usually prefer to choose high-standard sealed electrode paste that is more suitable for them. Among them, the main point is that the high-standard electrode paste is easy to bake, has stable performance and quality, and can ensure the baking quality of the electrode, so as to prev

 Firewood The main purpose of wood baking is to dry the moisture in the furnace and to initially bake the electrodes. Compared with coke and electric baking, wood baking has a larger baking area but a lower temperature, so the time is longer, generally lasting three to five days. Before the firewood is baked, the electrode paste is cushioned with refractory bricks to prevent adhesion. In the early stage of wood baking, the flame height does not exceed the furnace mouth. In the later stage, the electrode is baked with a high fire to make the wood burn evenly and violently. Burnt Before the coke is baked, a circle of flower wall with clay bricks is used to hold the coke around the electrode, and the height is lower than that of the furnace mouth. A layer of 100mm thick coke powder is placed on the bottom of the furnace to prevent oxidation at the bottom of the furnace. During the coking process, always observe the melting of the electrode paste, the height of the electrode paste, the cha