2016 Hot Sale Aod Argon Oyxgen Decarburizing Furnace

AOD Argon oxygen furnace and BOF Basic Oxygen Furnace, Converter Supply capacity from 2tons to 150tons, Please do not hesitate to let me know what capacity do you need.
 
AOD Argon oxygen furnace is a kind of Refining Furnace, which is characterized by side-blowing oxygen through the bottom tuyere with an immersion way. When the tuyere center is blown in with oxygen, argon and mixed gas of nitrogen, the proportion of argon and oxygen should be adjusted, then, it can achieve the purpose of decarburizing and retaining of chrome. Argon and nitrogen are used as cooling gas for tuyere ring to extend the life of tuyere. It can get the best operation by controlling the flow of the tuyere ring. And the flow of the tuyere center and tuyere ring can be controlled in master-control room.
The burning loss of tuyere, refractories and chrome is influenced greatly by the temperature of molten steel. So we can offer a special online temperature measuring system to buyers.
 
We adopt secondary combustion of top lance technology. It can increase the volume of cold material putting into the AOD and shorten the duration of smelting, and guarantee the continuous casting for multiple furnaces at last.
 
We also use the charging system with a weigh on its multiple bunkers, which can be directly connected with control system of computer. Then the smelting cycle will be shortened and labor intensity will be reduced. 
 
This equipment has a control system of intellectualized smelting process, which can decrease the consumption of all kinds of raw materials and gas during the smelting, and guarantee a stable quality of products.
 
New security design for smelting
It is aiming at the plugging of lance and the back-flow of molten steel which caused by electricity interruption during smelting process.
 
AOD series Refining Furnaces have a function to keep pressure of tuyere and contain uninterruptable power output to stop the above accidents, consequently improve the safety of smelting process.
 
The decarburization step is controlled by ratios of oxygen to argon or nitrogen to remove the carbon from the metal bath. The ratios can be done in any number of phases to facilitate the reaction. The gases are usually blown through a top lance (oxygen only) and tuyeres in the sides/bottom (oxygen with an inert gas shroud). After a desired carbon and temperature level have been reached the process moves to reduction. Reduction recovers the oxidized elements such as chromium from the slag. Desulphurization is achieved by having a high lime concentration in the slag and a low oxygen activity in the metal bath.
 
BOF Basic oxygen furnace (BOF), is a tiltable vessel lined with refractories such as magnesia carbon brick. Auxiliary equipment includes a chute for scrap charging, hoppers for alloys and fluxes, a lance for injecting pure oxygen gas, a sub-lance for measuring the temperature and carbon concentration of the molten steel, lifting devices for the lance and sub-lance, equipment for tilting the vessel, and equipment for recovering and cleaning the exhaust gas. The BOF capacity is expressed as the weight of crude steel that can be decarburized per heat. Most BOFs in China have a capacity of 150-300 tons.
 
Top Blown Process (BOP)
In the top blown process a water cooled oxygen lance is lowered from the top of the furnace and blows oxygen at supersonic speed into the melt. The majority steelmakers utilize top-blown oxygen steelmaking.
 
Bottom Blown Furnace (Q-BOP)
In the bottom-blown processes, oxygen is introduced through a number of tuyeres in the bottom of the furnace. In the Q-BOP process, the oxygen tuyeres are cooled by injecting hydrocarbon gas through an outer pipe surrounding the oxygen pipe. Most bottom-blown processes use methane or propane as the hydrocarbon coolant, but fuel oil is also used. A principle advantage of the Q-BOP process is that it reduces the height requirements of the process allowing a lower profile building to be constructed.
 
Combination Processes
One class of combination blown process uses top-blown oxygen with inert gas (argon and Nitrogen) injection through the bottom by means of tuyeres or permeable elements. In the second class of combination furnaces, there are both top and bottom oxygen lances; the bottom lances can also be used for inert gas injection during stirring.
 
The injected pure oxygen gas first oxidizes silicon and then carbon in hot metal. When the carbon concentration of the hot metal is decreased to about 1%, the oxidation of iron begins in parallel with that of carbon. The oxidation of iron becomes marked at carbon concentrations of less than 0.1%, decreasing both the oxygen efficiency for decarburization and the decarburization rate, while increasing iron loss into the slag.