Air leakage on sintering and high fat loss analysis and management

Air leakage on sintering with high temperature 2020 - fat loss analysis and management 11 - 04 Pan Zhong ( Angang steel knit fish lap steel branch equipment security, yingkou 115007). 【 Abstract 】 Analyzed the anshan Cun fish circle two 405 m2 sintering machine and related equipment the reasons of air leakage and the relationship between the air leakage and high temperature sintered fat consumption. Of sintering pallet, the chute, oil circuit, electromagnetic oil feeder equipment such as deterioration of control and adjustment of lubrication control program, leakage rate, a significant reduction in consumption greatly reduced, economic benefit is remarkable. 【 Keywords 】 Sintering machine. Grease; Air leakage; Power consumption 1 introduction sintering is a very important process in the process of smelting, air leakage rate is one of the important indicators to measure precision of sintering machine. As the equipment of old, air leakage rate of sintering machine, the first production of 43. More than 75% to a peak of 60%, and the high temperature of sintering machine fat loss is increasing year by year, and fat volatile sulfide gas produced after high temperature causes a certain to the surrounding environment pollution. In order to make the air leakage on sintering is controlled, in 2014 and 2015 respectively to two special smelting, the air leakage on sintering air leakage rate of the overall decline in 2016, the dosage of the sintering machine high temperature grease was greatly reduced. 2 2 air leakage reason analysis and treatment measures. 1 car seal car is an important part of sintering machine is characterized by large weight, number, parts, easy to damage. The car under the sealing device is the key to control air leakage parts. Ideally, slide and car plate full contact, the pressure of the slideway is zero. But in the use of a certain period of time, after sealing device appear different damage, reason mainly has the following points: ( 1) After the car off the wheels did not change in time, can lead to a car on one side of the sink, See figure 1) , swim of car seal plate and slide rapid wear. Back when the car wheel, swim plate of the sealing device and ramp gap has formed. （ 2) Car swim wear plate to a certain degree of the sealing device, falls off the round pin, swim plate overall loss ( See figure 2) 。 （ 3) Car between tourism board and board slot into sundry, sludge. Swim in the plate groove spring aging, unable to free expansion, loss of elasticity. Cars will appear after the death of swimming board crowded bigger air leakage passage ( See figure 3) 。 Dynamic air leakage points, the above several ways form for the above problems to solve, is the best way to use during the annual repair of car wheel to conduct a comprehensive inspection, according to the 'standard of point check' for bearings, bushings, wheels, etc for inspection and replacement. In the case of money allows, suggest to seal all replacement, so that we can guarantee the life of the sealing device and expansion in the same range. Be replaced under the sealing device according to the damage to repair as a spare. If fee nervous, for sealing device one by one, the sealing device of elastic, swim wear, bolt connection will be careful check, use the standard for replacement. 2. 2 sintering machine slideway sintering machine slideway is in the car down to the bottom of the sealing device, fixed above the bellows of sintering machine, the material chosen as 55 steel, and tempering heat treatment in order to ensure its through resistance. On each slide has oil hole and the groove, timing, fixed-point lubrication station lubrication pump through tubing sintering temperature grease evenly into each slide groove and the surface. In order to reduce the car is harmful to the track's friction sealing device, usually on sintering machine slideway forced lubrication, this can reduce the sintering machine current. But as the swim wear plate and the slide, especially slide use 12 months to 18 months, the thickness of the slide from original 30 mm wear to only about 15 mm ( See figure 4) , seal failure in great quantities, cause most of the grease as the flue gas by the wind. Can track inspection and replacement, often only in in the captain of the sintering time when stop, need to put the plane on the way go all of the car. Slide must keep track spacing after replacement, namely swim plate on the next plane and orbital plane wheel radius, the process need to constantly adjust the track level. Finally, through the system to oil, to determine the state of oil and lubricating oil in tank ( See figure 5) 。 2. 3 sintering machine lubrication system lubrication system failure is also a important reason of sinter machine leakage, wear, such as solenoid valve core body jam after the oil spill, As shown in figure 6, 7) O electrical aspects mainly coil is broken, identifier, or sensor failure, will cause electromagnetic valve failure. Is mainly is connected to the slide wire head line disconnect, the high temperature oil embolism, wire head stuck debris cause oil drainage not free, slide and swim plate wear and tear. So, every time all want to on line, electromagnetic valve fault inspection and handling. It is essential to ensure normal oil supply system maintenance project. Finally, through the control program ( See figure 8) Determine whether the automatic control system and alarm system failure. In addition, according to the different levels of regional oil, reasonable adjustment of each part to oil is also one of the effective measures to reduce oil consumption. 3 conclusion through figure 9 and statistical analysis of the data in table 1, 2013 and 2014, the air leakage rate of around 60% on average, fat consumption in sintering temperature is in 900000 yuan on average, after air leakage control system, control in 43, 2016. 30000 yuan. So, to reduce the air leakage rate of sintering machine is an important link in the smelting enterprise saving energy and reducing consumption, are also important measures to reduce the environmental pollution. （ Information source: metallurgical equipment net)