Detailed analysis of the wide range of applications of instant recarburizers

The instant recarburizer believes that most of the petroleum coke produced in China is low-sulfur coke, which is mainly used for aluminum smelting and graphite production, and also mainly used for the production of carbon products, such as graphite electrodes, anode arcs, steelmaking, non-ferrous metals, Used for aluminum smelting; making silicon carbide products, such as various grinding wheels, sand skins, sandpaper, etc.; making commercial calcium carbide for the production of synthetic fibers, acetylene and other products, and can also be used as fuel, but it requires hierarchical impact when used as fuel It can be burned after being made into coke powder by the JZC-1250 equipment. The main fuels that use coke powder are glass factories, coal water slurry plants, etc. Which quick-dissolving recarburizer is better to find petroleum coke? The purpose of calcination is to produce higher-quality carbon materials. For example, the calcined high-sulfur calcined coke sulfur 3.0% can be used as a pre-baked anode for aluminum, and the low-sulfur calcined coke can be used as a recarburizer, generally ash. For low-demand use such as cast iron, deep processing of petroleum coke can obtain graphitized petroleum coke, which is a high-quality carbon material and can be used as a recarburizer and other purposes. High-efficiency fast-dissolving recarburizer believes that recarburizer can be used as a graphite series inoculant in nodular cast iron. It mainly produces graphite and carbon micro-aggregates. The inoculation effect is long-lasting. It is mainly aimed at spheroidal graphite and has limited effect on metal substrates. Therefore, the quantity of silicon-containing inoculants used in normal inoculation treatment of ductile iron must be guaranteed and strengthened. Which is the best instant recarburizer for ductile cast iron, as long as the inoculation treatment is sufficient, especially for graphite. The higher the carbon equivalent, the more graphite nuclei are formed, the faster the spheroidal graphite grows and the smaller the spherical comparison, the lower the carbon content of the molten iron and the crystallized austenite, the ferrite spheroidal graphite cast iron The carbon content is generally w(c)=3.5%---4.3%, and the carbon equivalent is CE-4.5%--4.9%. The general value principle: is proportional to the wall thickness of the casting (the silicon content should be considered comprehensively. Value influence).

When smelting castings, the choice of recarburizer is very important, but the method of use and ratio are also very important. How to choose a good recarburizer and use the right method is very simple! Generally, when using it, it depends on the size of the furnace. It is also the key to choose the size of different particles. Generally, the particle size is more than 1-5mm. When using recarburizers in cupola smelting, the amount of pig iron charge should be reduced as much as possible. At the same time, the charge should be free of oil and rust. Recarburizer to ensure high carbon equivalent, and can relatively increase the amount of scrap steel, it is necessary to choose graphitized smelting recarburizer, that is, graphitized recarburizer to show graphitization, which quick-dissolving recarburizer is better found at high temperature Under the conditions of smelting, carburizing can be used to obtain good activity, reflecting the shape of graphite on the casting, which is conducive to improving mechanical properties, reducing shrinkage tendency, and improving processing performance. Generally, it is added together with other furnace materials. Put 20-40 kg of remaining molten iron into a plastic bag to fill the recarburizer into the molten iron surface. How often is the recarburizer required to be prepared by adding 4 kg of recarburizer for every 100 kg of scrap steel added. This ratio is used to prepare for recarburization. The agent is the appropriate ratio. In the process of high-efficiency synthetic cast iron smelting, due to the large amount of scrap added and the low content of C in the molten iron, recarburizers must be used to increase recarburization. The carbon in the recarburizer is in the form of elemental carbon. The melting temperature is 3727°C. Therefore, the carbon in the recarburizer is mainly dissolved in the molten iron by dissolution and diffusion. Which is good for the quick-dissolving recarburizer. It has been found that when the graphite recarburizer content in the molten iron is 2.1%, the graphite can be directly in the iron. The direct dissolution of the semi-graphitized recarburizer basically does not exist, but as time passes, the carbon gradually diffuses and dissolves in the molten iron. For the recarburization of the induction furnace smelting cast iron, crystalline graphite is used. The recarburization rate of recarburization is significantly higher than that of semi-graphitized recarburizers.