Steel, decarbonization

Apart from physical agents such as temperature and the mechanical action of gases, chemical agents also cause the erosion. Monni [50] noticed that the erosiveness of smokeless powder decreases with the addition of charcoal, probably because the additional quantity of carbon thus introduced serves to carbonize the steel which may undergo decarbonization under the influence of C02 at a high temperature, according to the reaction ... 

The decarbonization of steel increases the porosity of the metal. The adsorption of gases in the pores may intensify the erosive action since the gases enter the pores at high pressures and temperatures and then expand, they blow up the pores. 

Decarbonization. This operation is performed on cast iron, to convert it into steel or soft iron The articles to bo decarbonized are packed in finely-powdered hematite, or native oxide of iron, to which iron filings are often added, and exposed for some time to a strong red heat, by which tho excess of carbon is abstracted or burnt out The process somewhat resembles annealing or cementation. 

Like in the Sleipner field (North Sea), the CO2 is anticipated to be captnred and stored appropriately. Additional CO2 capture is possible in the power and other energy intensive sectors. Specific possibilities for the mitigation of CO2 emissions include decarbonization of blast furnace gas in the iron and steel industry, and in the hydrogen production. 

At first, a reactor was constructed from a steel tube to be operated at 870 K and 100 atm, but it burst after 80 h. Closer inspection revealed that dissolution of hydrogen had caused embrittlement of the steel, which, together with decarbonization, caused this fatal result. The solution found by Bosch was equally... 

The burner is located at the front of the LEPOL grid, and receives 20% of the total flow of coal. In order to withstand the new thermal loads, the bricks situated in the decarbonation zone have been replaced by others, richer in alumina the grate plates are now in 30 % chromium steel. The temperature of the grate is controlled and triggers an alarm in the case of too high a temperature. The height of the layer has risen from 18 to 24 cm and the rate of decarbonation from 24 to 47 %. 

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