Carbon Additive for Casting Speed Fusibility of 10kg/min Graphite Recarburizing Agent

Graphite recarburizer/recarburizing agent/carburetant used for casting

Graphite recarburizer, there are many coarse hypereutectic graphite in the traditional process. The coarse graphite is hereditary, the melting temperature is low, the coarse graphite is not easy to be eliminated, and the coarse graphite from the liquid to the solid cast iron structure , On the one hand to reduce the strength of cast iron can be achieved, reducing the performance of the material, on the other hand the original solidification process should be generated by the expansion of the expansion of the role of weakening, so that the liquid coagulation process tends to shrink.

Recarburizing agent, in the cupola melting, should try to reduce the amount of pig iron charge, the use of carbon agent to ensure high carbon equivalent, the relative increase in the amount of scrap. In this way, under the conditions of high temperature melting, carburizing can be obtained with good activity and graphitization more significant carbon. In the casting reflects the shape of graphite is better, which is conducive to improving mechanical properties, reduce the tendency to shrink, improve processing performance.

Carburetant used for casting, furnace smelting, the same by the amount of low-iron or even zero, to carburizing the way to obtain high-quality iron liquid. From the material performance point of view, in the past that a large proportion of the practice of the amount of iron, with the same composition of the amount of high scrap compared to its mechanical properties should be lower half of the grade. Therefore, the new process of adding carbon agent smelting is superior to the traditional ratio of the large amount of pig iron, regardless of cost or finished product performance.

Graphite recarburizer/recarburizing agent/carburetant used for casting

1, the chemical composition of pure, high carbon, low sulfur, harmful ingredients minimal, high absorption rate.

2, the product of a high degree of graphitization, to improve the nuclear iron nucleation capacity, in the breeding of ductile iron to increase the number of ink ball, iron in the electric furnace to increase the crystal nucleus, so that the distribution of graphite in the casting refinement, uniform.

3, the particle size is moderate, porosity, absorption speed.

4, excellent performance, stability.

High-quality carbon agent can help reduce the cost of smelting production, improve the quality of smelting metal and castings, so that users get cost and quality of the two significant benefits.

Graphite recarburizer/recarburizing agent/carburetant used for casting

In the smelting process, due to improper ingredients or improper loading and decarbonization and other reasons, sometimes caused by carbon content in steel did not meet the requirements of the top, then to increase the carbon content of molten steel. Commonly used carbon agent with carbon pig iron, electrode powder, petroleum coke powder, charcoal powder and coke powder. In the case of converter smelting and high-carbon steels, petroleum coke containing little impurities is used as carbon. On the top blowing converter steel with carbon requirements is fixed carbon is high, ash, volatile and sulfur, phosphorus, nitrogen and other impurities content is low, and dry, clean, granular moderate.

The fixed carbon component is:
W (C)> 96%, volatiles ≤ 1.0%, w (S) ≤ 0.5%, w (moisture) ≤ 0.55%, particle size 1 - 5mm.
Granularity is too easy to burn easily, too thick to join after floating in the molten steel surface, not easily absorbed by molten steel. For the induction furnace particle size of 0.2-6mm, of which steel and other ferrous metal particle size in the 1.4-9.5mm, high carbon steel requires low nitrogen, particle size of 0.5-5mm, and so the specific needs of the furnace according to the specific type of smelting The type of detail and so the specific judgment and selection.

Graphite recarburizer/recarburizing agent/carburetant used for casting

1. Furnace input method:
recarburizer is suitable for melting in the induction furnace, but according to the specific requirements of the use of technology are not the same.
(1) in the IF furnace smelting in the use of carbon agent, according to the ratio or carbon equivalent requirements with the material added to the lower part of the furnace, the recovery rate of up to 95%
(2) If the carbon content is insufficient to adjust the carbon content, first slag in the furnace, plus carbon agent, through the molten iron temperature, electromagnetic stirring or artificial stirring to dissolve the carbon absorption, the recovery rate of about 90%, if The use of low-temperature carbon increase process, that is, only part of the furnace melting, molten iron liquid temperature is low, all the carbon agent added to the molten iron at one time, while the solid charge into the molten iron will not let it exposed iron Liquid surface. This method of iron liquid carbon up to 1.0% or more.
2. Furnace outside the carbon:
(1) package within the sprayed graphite powder
The use of graphite powder to do carbon agent, blowing into the amount of 40kg / t, is expected to make iron liquid carbon content from 2% to 3%. With the iron content of molten iron gradually increased, the utilization of carbon decreased, the temperature of carbon before the carbon temperature of 1600 ℃, the average after the increase of 1299 ℃. The use of nitrogen as a carrier, but in industrial production conditions, with compressed air more convenient, and compressed air in the air to produce CO, the chemical reaction heat can compensate for part of the temperature drop, and CO to restore the atmosphere conducive to Improve the carbon effect.
(2) the use of carbon agent when the iron
Can be 100-300 purpose graphite powder recarburizer into the bag, or from the trough with the flow into the molten iron after the full mixing, as far as possible to dissolve the carbon absorption, carbon recovery rate of about 50%.

Graphite recarburizer/recarburizing agent/carburetant used for casting, For casting, cast iron, cast steel, castings will have a requirement for carbon, then the carbon as the name suggests is to increase the carbon content of iron liquid, for example, in the melting of the commonly used charge for the pig iron, scrap, Pig iron has a high carbon content, but the purchase price is higher than that of scrap. Therefore, it is necessary to increase the amount of scrap and reduce the amount of pig iron and increase the amount of carbon, which can reduce the cost of casting.

Graphite recarburizer/recarburizing agent/carburetant used for casting

1. Petroleum Coke recarburizer

2. Low Nitrogen recarburizer

3. Graphited recarburizer

1. Artificial graphite

2. Oil coke

3. Natural graphite

4. Coke and anthracite

Graphite recarburizer/recarburizing agent/carburetant used for casting

The recarburizers can be packed in a variety of standards such as 5 kg, 25 kg, 30 kg, 50 kg and 1 tonne high density polyethylene package.Jumbo bags packing: 0.75-1.15MT. or as customers' requirements.