Can pig iron pour cold water at high temperature?
When many mills, process, basic task of steelmaking is decarburization, dephosphorization, desulphurization, deoxidation, removal of harmful gases and non metallic inclusions, increasing the temperature and composition adjustment. Summarized as: "four" (carbon, oxygen, phosphorus and sulfur), "two" (go to gas inclusions), "two adjust" (composition and temperature). The main techniques used are: oxygen, slagging, heating, adding deoxidizing and alloying agents.
(1) tapping on the furnace, tapping the slag, examining the lining and tilting equipment, and making necessary repairs and repairs;(2) tilting furnace, plus scrap steel, molten iron, rock furnace (vertical position);(3) throw guns blown open, also joined the first batch of slag (furnace noise first, from the mouth out of red smoke and flame spraying black; 35 minutes after the last manganese oxide, carbon and oxygen reaction gradually strong, flame becomes large increase in brightness; and melting, noise reduction);(4) 3 adding second batches of slag to continue blowing (with the decrease of the blast of carbon steel, about 12 minutes later, the flame is weak, stopped blowing) after 5min;(5) tilting furnace, temperature measurement, sampling, and determination of time or blowing steel;
In the converter converter. The converter like pear shaped wall, refractory, furnace side holes (vents), compressed air from the hole in the furnace, also known as side blown converter. First, at the level of converter, inward injection of liquid iron and 1300 DEG C, adding a certain amount of raw lime, and then air the bubbling and vertical rotating converter. Then the reaction surface of the liquid iron, iron, silicon, manganese oxides (FeO, SiO2, MnO) generated by convection in molten steel and slag, slag, furnace in the whole reaction. A few minutes later, only when molten steel with silicon and manganese. A small amount of oxidation, to produce the steel of carbon monoxide (exothermic) seething. Carbon export spillover, due to the combustion of carbon monoxide and a huge flame. Finally, phosphorus is also oxidized, and further formation of iron phosphate of lime. Ferrous phosphate, phosphoric acid to form a stable Calcium and calcium sulfide, into the slag. When lowered, phosphorus and sulfur flame extinction, brown iron oxide occurs when steam furnace, show that the steel has been tempered. Then we should immediately stop the blast, and the horizontal position of the converter when molten steel is poured into the bag, and deoxidation deoxidizer. The whole process takes about 15 minutes if the oxygen. From the bottom blowing, it is in the bottom blown converter; oxygen from BOF.
