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Raw material technology of graphite carburizer

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 　　Graphite means that the molecular structure of carbon products is changed and arranged regularly by high temperature or other means. This molecular arrangement makes the molecular spacing of carbon wider, which is more conducive to decomposition and nucleation in molten iron or steel. The graphite carburizers on the market now generally come from two ways, one is the cutting of waste materials of graphite electrodes, and the other is the 3000 degree graphitization of petroleum coke. 　　There are many kinds of raw materials and production processes of carburizers. It is not said in the market that graphite powder is used for pressing molding. This production method needs to add too much binder for molding, and the carbon content generally cannot meet the requirements of high-quality carburizer. The pressed graphite powder is a solid block without a porous structure, so its absorption speed and absorption rate are not as good as those of calcined and calcined carbonaceous agents. High
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Effect of anthracite carburizer on melting

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 　　The same chemical composition uses different melting processes, different compositions and proportions, the metallurgical quality of molten iron is completely different, and good carburization effect is obtained. The electric furnace uses carbon enhancement technology, and the anthracite carburizer has three main effects on melting. 　　1、 The hot metal carbonization technology can increase the graphite crystal nucleus in the smelting process, especially in the electric furnace smelting process. The addition of cupola in the iron carbide smelting process can increase the long-term nucleation of graphite solution and reduce the oxidation of hot metal. 　　2、 Increasing carbon emissions is the best measure to prevent or reduce the shrinkage trend of enterprises. Due to the role of graphite in the solidification process of expanded molten iron, good graphitization tends to reduce the shrinkage of molten iron. 　　3、 Under the condition of high carbon content, in order to obtain high-strength
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Inspection of graphite heater

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　　The graphite heater shall be inspected and managed in the early stage before use, otherwise, the graphite heater may explode during use. 　　The following should be done: 　　1. First of all, check whether the graphite heater has cracks in the early stage of work. If there are no cracks, put the graphite heater above liubaidu and dry it sufficiently; 　　2. There shall be no ponding around the furnace and in the pit in front of the furnace, and there shall not be too many irrelevant objects piled near the graphite heater; 　　3. Strictly check whether there are explosives in the charge, preheat and keep dry when adding charge, and add graphite heater slowly.
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What is the mechanical strength of electrode paste

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　　The mechanical strength of electrode paste includes compressive strength, flexural strength and tensile strength 　　The height of the electrode paste refers to the height from the upper end of the electrode clamp to the top end of the electrode paste. If the electrode paste is too high, the coarse and fine particles in the electrode paste are prone to delamination, or the electrode cylinder is expanded due to too high paste column pressure. If the electrode paste column is too low, it is difficult to obtain a dense electrode due to too low paste column pressure and poor filling. The electrode paste is consumed too fast. Proper height of electrode paste column is beneficial to improve the quality of electrode baking and reduce consumption. 　　The mechanical strength of the electrode paste includes compressive strength, flexural strength and tensile strength. The mechanical strength of carbon products is anisotropic, that is, the composition of raw material particles of carbon products i
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Physical and chemical properties of expanded graphite

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 　　Expanded graphite is a product of deep processing of graphite. Expanded graphite can be used to produce packing rings, various types of gaskets, and can also be directly pasted on various metal surfaces to effectively solve gas-phase sealing. 　　Expanded graphite has good corrosion resistance, high and low temperature resistance, good compression resilience and high strength. Expanded graphite is very easy to adsorb oil, organic molecules and hydrophobic substances. After oil absorption, it floats on the water surface, which is easy to catch and recover. It can be reused and processed easily. 　　Expanded graphite gasket can be widely used for static sealing of pipeline, valve, pump, pressure vessel, tower, heat exchanger, condenser, etc. It has good expansibility, high temperature resistance, heat insulation, lubricity and chemical stability.
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Analysis of nitrogen content of carburizer

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　　1. Ordinary calcined petroleum coke is a carburizer. Because it has not been calcined at high temperature, the calcination temperature may be low and the time may be short. The nitrogen content is generally about 1000ppm, and the sulfur content is also high. It is impossible to draw clear marks on white paper. 　　2. High temperature calcined petroleum coke carburizer, nitrogen content is 300-500ppm, sulfur is much lower than the former. Clear marks can be left on white paper. 　　3. The nitrogen content of coal carburizing agent varies according to the quality of coal, and is generally 2000-7000ppm, that is, 0.2-0.7%. 　　4. The best high-temperature calcined petroleum coke carburizer with nitrogen content of 100ppm. Sulfur is lower than the former. It can leave clear marks on white paper and feel comfortable, just like 6B pencil. 　　5. Graphite column particle carburizer is a kind of carburizer that uses graphite powder and binder to extrude into cylindrical particles. This kind of carbur
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Introduction to sintering of electrode paste

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  　　Continuous automatic baking electrode is composed of   electrode paste   and iron shell. The electrode is consumed continuously when working in the carbide furnace, so it needs to be continuously discharged to supplement. When the electrode is lowered to the lower part of the conductive jaw plate, it is calcined at about 1000 ℃ to carbonize the   electrode paste . Because the electrode iron shell can continue to be welded without power failure in the electric furnace, the   electrode paste   is continuously added to the iron shell, and it is sintered in the carbide furnace, so it is called continuous automatic baking electrode. 　　Self burning electrodes are widely used in carbide furnaces and ferroalloy furnaces. The characteristic of this electrode is that the diameter can be expanded to 2 meters. It is very convenient and inexpensive to connect on the carbide furnace without screw joints. This creates favorable conditions for the development of  calcium carbide furnace  to large
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