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 Electrode paste manufacturing includes such production processes as medium crushing and screening, grinding, batching, kneading and molding cooling. ① Medium crushing screening The project is equipped with a medium crushing and screening system for calcined anthracite. The calcined anthracite is fed by electromagnetic vibrating feeder, and then sent to a double-layer horizontal vibrating screen and a single-layer horizontal vibrating screen by belt conveyor and bucket elevator. After screening, the materials with particle size greater than 10mm are returned to the intermediate bin, and then fed by electromagnetic vibrating feeder to the double roller crusher. Re sieving after medium crushing. 10-6mm and 6-3mm grain size materials can be directly into the corresponding batching bin, or can be returned to the double roller crusher to be finely crushed to less than 3mm, which is convenient for flexible production adjustment. There are 3 kinds of particle size materials, i.e. 10-

 Use process and consumption of electrode paste in terms of use characteristics, electrode paste is a continuous self baking electrode. During use, its outer layer is a cylinder made of 1-2mm thick steel plate. The electrode paste is regularly added into the cylinder. With the progress of production, the electrode paste is gradually softened, melted and roasted. During roasting, a large amount of volatiles are released. After entering the conductive clip of the electrode, due to the high-temperature effect, it is from semi coking to complete coking, * and becomes a conductive carbon electrode. The electrode paste is baked into a conductive electrode by various heat of the electric furnace itself, so it is called a self baking electrode. During the working process of the electrode, a section of cylinder is connected to the top of the electrode at regular intervals, and a certain amount of electrode paste is added, and the process is repeated.

 　　The so-called oven drying is an operation that uses heating method to gradually adapt the furnace lining and electrode to charging smelting. Its main purpose is to dry the furnace lining and roast the electrode paste. The quality of oven drying will not only affect the service life of the furnace lining, but also directly affect whether the electric furnace can be put into operation smoothly. Therefore, the oven drying system table should be formulated in detail and strictly implemented in the opening plan. 　　Coke oven 　　There are three methods in the stage of oven drying: wood drying, oil drying and coke drying. This paper only introduces the coke drying. As the name implies, coke baking is a method of baking the furnace by using the combustion heat of coke. Large metallurgical coke with less ash shall be used to make fuel (particle size > 150mm). During the baking of electrode paste, it shall be ensured that the coke burns close to the electrode and is added in time. I

 When the sintering temperature of the electrode paste is between 300 and 800 degrees, because the volatile matter of the coal tar pitch has been discharged, the remaining coal tar pitch has been carbonized to form a network, and it is fused with various electrode paste raw materials, and the mechanical strength reaches the standard value. Our Rongxin Carbon technicians have calculated that the compressive strength of the electrode paste at this time is 17-33 MPa, the flexural strength is 7--17 MPa, and the tensile strength is 4--8 MPa. After the electrode below the copper tile of the submerged electric furnace enters the smelting process, the temperature of the electrode will rise further due to the further increase in the temperature of the raw material, and the mechanical strength will increase with the rise in temperature. The temperature of other materials rises to 1500 degrees. When the mechanical strength drops sharply, such as heat-resistant alloys, the mechanical strength of c

 Coke is one of the most important raw materials for making electrode paste, especially graphitized electrodes. The most valuable coke is low-ash coke (sometimes called ash-free coke), and its ash content does not exceed 1%. These cokes include petroleum coke and pitch coke. The first type is coke obtained by coking petroleum residue, and the second type is coke produced by processing coal pitch in a chemical coking industrial furnace. The solid carbon-containing product obtained by high-temperature treatment of petroleum residue is called petroleum coke. Due to the different raw materials and production methods, the content of these products is also different. At present, there are two types of petroleum coke with different properties, one is kettle-type petroleum coke, and the other is delayed coking petroleum coke. The former contains 3 to 7% of volatile matter, and the latter contains 10 to 18% of volatile matter. The residue obtained by coking coal tar pitch in the same coke oven

 70% of aluminum electrolytic cell failures occur in pre-baked anodes. Anode failures that often occur in electrolyzers include: partial overheating of the anode, uneven current distribution, anode dropout, anode long bag, anode crack fault, anode block shedding, a large amount of carbon slag falling into the electrolyte to make it carbon-containing, oxidation and combustion around the anode, and The anode is tilted and so on. These failures are mainly caused by the quality of pre-baked anodes and improper electrolysis operations. 1. The anode drops off. The pre-baked anode may cause the anode carbon block to separate from the steel claw due to the poor casting of the phosphorus pig iron or the defect of the anode carbon bowl. When this phenomenon occurs, it is necessary to remove the carbon anode from the electrolytic cell and replace it with a new pre-baked anode. When the anode carbon block has large cracks, the block will also be cracked. 2. Long anode bag. Due to the uneven intern

 Electrode paste is also called self-baking electrode. It is a kind of semi-finished electrode material made of electric forging coal, residual electrode, etc. as aggregate, and asphalt, tar, etc. as binder. In the process of use, the electrode paste needs to be injected into the submerged arc furnace. When it is heated to about 400 degrees, the electrode paste melts and then completes sintering to become a solid. When it is heated to 800 degrees, the arc combines with the original ore to generate huge heat to complete the ore Smelting. The so-called airtight paste is only for the type of submerged arc furnace. Submerged arc furnace is divided into closed type, semi-closed type and open type. These different types of submerged arc furnaces use electrode pastes. Because of the different furnace types, over time, the electrode pastes applied to closed submerged arc furnaces are called closed electrode pastes, or closed pastes for short; they are used in open or semi-closed arc furnaces.

 Nickel-iron electrode paste has always been regarded as a high-end product in the electrode paste market. For a long time, the formula of nickel-iron electrode paste has been a mystery. At present, there are only a few electrode paste factories that can produce high-standard sealed electrode pastes that meet the needs of ferronickel production. The formula of the nickel-iron high-standard airtight paste is the same as that of the ordinary national standard electrode paste, and the raw material ratio is different. The terminal price of the electrode paste processed by our factory for a trading company to one of the largest alloy plants in Asia in Jiangsu is close to 4,000 yuan/ton. The price of ordinary electrode paste is only between 3000-3500. The raw materials of nickel-iron smelted electrode paste are indeed a little higher than the cost of ordinary electrode paste. Regarding the amount of electrode paste, our factory's high-standard sealed paste reaches 8-10kg/ton of nickel-ir

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

Crushing and screening Laterite ore has low nickel content and uneven lumpiness. The particle size is finer, and there are also large blocks with a particle size of more than 100 millimeters. It is necessary to consider the installation of cone, jaw crusher or counter-roll crusher and screening equipment, so that the high-standard closed paste electric furnace ore and other charge can meet the technical requirements of use. Pre-drying Laterite ore imported from Indonesia and the Philippines usually contains 32-40% moisture. About 20% of the physical water should be dried at 120°C for 2 hours to remove. Use closed paste submerged arc furnace, hot blast stove, rotary furnace hot flue gas to dry laterite, blast furnace or closed submerged arc furnace gas or to strengthen production equipment (7-8% crystalline water, decomposed and removed at 400℃, after half an hour.) Block The powdered red clay is sintered, pelletized, and briquetted into the electrode paste submerged arc furnace, w

The electrode is the only channel for the electric furnace to input electric energy, and it can also be said to be the heart of the electric furnace. Therefore, making the electrode have good working conditions is the key to the successful opening of the furnace. Large-scale submerged arc furnaces generally use self-baking electrodes. Self-baking electrodes use anthracite, pitch, etc. as raw materials to make electrode paste at a certain temperature, and then put the electrode paste into the installed electrode shell and then sinter and coke. . Therefore, to make a reasonable oven system, it is necessary to understand the sintering characteristics of the electrode paste. Sintering process of Rongxin carbon electrode paste self-baking electrode The self-baking electrode sintering process is a process in which the binder decomposes and gradually discharges volatiles as the temperature increases. The sintering of the electrode can be roughly divided into three stages. The first stage

 The height of the electrode paste refers to the height from the upper end of the electrode clip to the top of the electrode paste. If the electrode paste is too high, the coarse and fine particles in the electrode paste are prone to stratification, or the electrode cylinder will be swollen due to too much pressure of the paste column. If the electrode paste column is too low, the pressure of the paste column is too small and the filling is poor, and it is difficult to obtain Dense electrodes. The electrode paste is consumed too quickly. The proper height of the electrode paste column is beneficial to improve the quality of electrode firing and reduce consumption. Electrode paste is the conductive electrode of various submerged electric furnaces, and it is an indispensable product in industrial production. We at Rongxin Carbon have read many domestic and foreign materials, but we have not found any materials that specifically discuss the mechanical strength of electrode pastes. In orde

The Manufacturing Refine Of Graphite Block Material Quick Index Hidden 1 The production process of graphite block product 2 ① Tool crushing as well as screening 3 ② Grinding. The production of graphite block product consists of manufacturing procedures such as tool crushing and also evaluating, grinding, batching, kneading and also forming as well as cooling. graphite block material. ① Medium Squashing And Screening. This job is geared up with a medium squashing and also evaluating system for calcined anthracite. The calcined anthracite is fed by an electro-magnetic vibrating feeder, and sent out to a double-layer straight vibrating display and also a single-layer horizontal vibrating screen using a belt conveyor and a bucket elevator. The products are screened as well as processed. The fragment size is more than 10mm. Return to the intermediate bin, and then feed the product from the electromagnetic shaking feeder right into the double-roll crusher. Sieving again after medium crushin