陽極焙燒
- 分類:工藝技術
- 發(fā)布時間:2020-10-23 14:31:34
- 訪問量:0
生陽極塊經板式輸送機送入焙燒車間,經碳塊編組站編為7塊一組,置于專用的編組架上,產品裝爐時由多功能機組一次夾2組碳塊(共14塊)裝入焙燒爐。填充料的裝、出爐操作,采用1臺多功能機組和1臺填充料專用裝出爐機組共同完成。生陽極的焙燒采用一臺54室敞開式焙燒爐,共設3個火焰系統(tǒng),每個火焰系統(tǒng)6室運轉,焙燒曲線為26~30h/室,每個爐室8個爐箱,爐箱尺寸5300mm(長)×800mm(寬)×5600mm(深),每箱裝3層,每層裝7塊,每個爐室裝168塊。焙燒爐用焦爐煤氣作為燃料。按編制的時間表,將裝好生陽極炭塊的焙燒爐室接入加熱系統(tǒng),加熱系統(tǒng)煙氣溫度為1200℃,整個加熱升溫過程用計算機進行控制。經156~180小時完成加熱焙燒后切斷熱源脫離加熱系統(tǒng),對爐室進行強制冷卻,冷卻到規(guī)定的時間后出爐。
生陽極炭塊裝入焙燒室時,需要在炭塊四周和頂部填充焦粉,以防止炭塊在高溫焙燒時接觸空氣氧化。加熱系統(tǒng)的火道采用負壓運行,部分填充焦粉、生陽極炭塊高溫焙燒過程原料瀝青中的揮發(fā)份等從焙燒室縫隙吸入火道被燃燒。
陽極焙燒分4個區(qū),工作區(qū)-冷卻區(qū)-加熱區(qū)-預熱區(qū)。6個室一周轉。工作區(qū)為1個室,冷卻區(qū)為1個室,加熱區(qū)為1個室,預熱區(qū)為3個室。工作區(qū)為裝、出陽極區(qū),冷卻在冷卻區(qū)由鼓風機強制通風冷卻,風在冷卻陽極的同時,自身也得到預熱,熱風作為加熱區(qū)的一次空氣助燃,燃燒后的廢氣進入預熱區(qū)預熱陽極。
焙燒陽極出爐時,首先用填充料裝出爐機組去除覆蓋在陽極上的填充料,然后用多功能機組將兩個爐箱內的陽極(共14塊)一次吊出送到清理站解組并清理,由陽極清理機組的機械刮刀機械清理,同時抽風吸塵。經清理及測試后合格的陽極炭塊送到碳塊庫由堆垛天車堆垛貯存,外售。
在焙燒過程中,從焙燒爐排出的含有瀝青焦油及粉塵的焙燒煙氣進入凈化系統(tǒng)處理。
The green anode block is sent to the roasting workshop by the plate conveyor, and is grouped into 7 blocks by the carbon block marshalling station, and placed on a special marshalling rack. When the product is installed in the furnace, the multifunctional unit clamps 2 sets of carbon blocks at a time (14 blocks in total) ) Put it into the roasting furnace. The filling and discharging operation of the filling material is jointly completed by a multi-function unit and a special filling and discharging unit. A 54-chamber open roasting furnace is used for the roasting of the green anode. There are 3 flame systems in total, each of which operates in 6 chambers. The roasting curve is 26-30h/chamber, and each furnace chamber has 8 furnace boxes. The size of the furnace box 5300mm(length)×800mm(width)×5600mm(depth), 3 layers per box, 7 pieces per layer, and 168 pieces per furnace. The roaster uses coke oven gas as fuel. According to the compiled timetable, the roasting furnace chamber with the raw anode carbon block is connected to the heating system. The flue gas temperature of the heating system is 1200 ℃, and the entire heating process is controlled by a computer. After 156 to 180 hours of heating and roasting, the heat source is cut off and separated from the heating system, the furnace chamber is forced to cool, and the furnace is cooled to a specified time and then out of the furnace.
When the raw anode carbon block is loaded into the roasting chamber, it is necessary to fill coke powder around and on the top of the carbon block to prevent the carbon block from being oxidized by air during high-temperature roasting. The fire channel of the heating system is operated under negative pressure, partially filled with coke powder and volatile matter in the raw material pitch of the raw anode carbon block high-temperature roasting process, sucked into the fire channel from the gap of the roasting chamber and burned.
Anode baking is divided into 4 zones, working zone-cooling zone-heating zone-preheating zone. 6 rooms turn around. The working area is 1 room, the cooling area is 1 room, the heating area is 1 room, and the preheating area is 3 rooms. The working area is the anode loading and exiting area. The cooling area is cooled by forced ventilation by a blower. The wind cools the anode while preheating itself. The hot air serves as the primary air in the heating area to assist combustion, and the burned exhaust gas enters the preheating area for preheating. Hot anode.
When the roasted anode is out of the furnace, first use the filling material to remove the filling material covering the anode, and then use the multifunctional unit to lift the anodes in the two furnace boxes (a total of 14 blocks) to the cleaning station for disassembly and cleaning , It is mechanically cleaned by the mechanical scraper of the anode cleaning unit, and at the same time, it is vacuumed and dusted. After cleaning and testing, the qualified anode carbon blocks are sent to the carbon block warehouse for storage by stacking cranes and sold outside.
In the roasting process, the roasting flue gas containing pitch tar and dust discharged from the roasting furnace enters the purification system for treatment.
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