Converter of refine copper plant uses fireproof material and operation method introduction

March 15, 2024Nov 25, 2024
Because have technique,refine copper plant uses converter simple, operate easy, efficiency advanced characteristic, be grown by refine copper plant consequently period in the blowing process that uses extensively at cupreous milometer.  Boast refine system The blowing system of converter has 3 kinds: Odd furnace blowing, furnace exchange blowing and period commutative blowing. Current, home uses furnace of only station blowing to exchange blowing more.


The operation method of converter of blowing of sulfur of copper of refine copper plant and optimize odd furnace blowing The factory has two converter only commonly, among them an operation, one reserves. After exercise of one furnace blowing is finished, join cupreous milometer afresh, have another stove second blowing works. Furnace exchanges blowing When the factory has 3 converter commonly, one reserves, two work alternately.  After 2 furnace end complete furnace blowing to work, a furnace has another stove instantly second blowing works. But a furnace can end in 2 furnace cupreous milometer is joined beforehand before blowing, 2 furnace can cast the back row that person blowing works to give ancestor copper in a furnace, shortened thereby stop play time. Period commutative blowing  When the factory has 3 converter commonly, one reserves, m of two alternant exercise is in the S1 of a furnace period with between S2 period, the B2 that thrust deep into the enemy forces has 2 stove period blowing. cuttings pick-up, put blister copper, clear the exercise arrangement such as wind eye is in another converter investment sends wind blowing junior travel. Only brief when two converter switch works halt is blown, shortened stop play time. For the copper of 50% with grade of 145t of every furnace processing milometer is exemple, by 3 kinds blowing system undertakes comparative, blow rate required is 32000m3/h(standard reference conditions) .
3 kinds blow what refine spends to compare Gui Ye is used period commutative blowing, its purpose depends on raising the rate when converter workshop sends wind, what improvement supplies flue gas to vitriolic workshop is successional, assure to show fast fusion furnace to discharge cupreous milometer equably quite. 2) fuse-element temperature Furnace life is a of converter job stand or fall important technology economic norms. The main reason that lining mars has 3: Chemistry is eroded, machinery is marred and thermal stress. 3 when converter mars main reasons are concerned with temperature. Accordingly, in actual unit process of cargo bandling, should stop high temperature work. According to the property of fireproof material, commonly control of slagging period temperature is in (℃ of 1250 ± 10) , build control of cupreous period temperature to be in (℃ of 1180 ± 10) . The main factor that affects furnace temperature has:
(1) copper milometer is measured. Initiative temperature and the time that begin blowing have cupreous milometer to concern directly, initiative temperature jumps over cupreous milometer amount of milometer of tall, copper is larger, the time that comes to blow is shorter, criterion furnace temperature is higher; Conversely, criterion furnace temperature is lower. (2) flux adds rate. Flux increases person rate faster, can make fuse-element temperature local reduce, add rate too slow, the quantity of heat that chemical reaction emits can't make temperature lifts quickly. (3) blast intensity. When blast intensity is in reasonable wind makings to compare, reaction is stronger, bring about fuse-element temperature to rise significantly; Blast intensity is too small, the oxygen that reaction place needs in short supply, what frit temperature spends is elevatory will be restricted. (Cold makings measures 4) . In Piao of process of cupreous milometer blowing, adding person cold makings is to use up the excess quantity of heat that reaction generates, shun high temperature work, in order to reduce the loss that furnace wall uses fireproof data. Cold makings quantity is the main factor that decides converter heats up condition, cold makings quantity is too little, criterion the temperature inside furnace is high, unfruitful quicken liner brick use up; Cold makings quantity is overmuch, criterion the temperature inside furnace is too low, cause difficulty to blowing process, perhaps cannot form good slag, or blowing time singularly is lengthened.
3) the operation stays wind time Operation clearance stops wind time to will affect fuse-element temperature, time stopping wind is longer, temperature drops bigger. The effect that indicated time stopping wind to be led to the gearshift when place temperature differring inside lining. Time stopping wind is longer, rate of the gearshift when lining temperature is older. 4) aerobic content limits Although oxygen boosting blowing can make productivity gets rising, can solve use flue gas to make acerbity issue, but the oxygen content of blast of all cupreous converter oxygen boosting on eye preexistence bound still under 30% . Prep above of the content that be like oxygen this level, criterion the attaint of the fireproof stuff that converter a place with a draught takes can be increased.
Converter is intermittent type operation with blowing of fireproof material converter, inside each cycle, have for many times stop wind to enter makings exercise pouring broken bits, the temperature inside the furnace in blowing process is 1200 ~1300 ℃ , and stop wind to enter makings, broken bits, when pouring blister copper, inside furnace inspiratory and much cold air, temperature drops quickly, the furnace temperature when general feed in raw material drops 300 ~500 ℃ , converter furnace temperature can fluctuate in ℃ of 800 ~ 1500.    Because the fireproof material of this converter liner wants,have very good heatproof shake property. Air of the high pressure when converter is operated is blown through blast tuyere. In form all round blast tuyere churn strongly, high temperature fuse-element has to lining extremely strong erode action, the fireproof material because of this converter especially the fireproof material of blast tuyere area should have very good wearability. In the meantime, the slagging agent of a few cold makings and solid state is added even when converter smelt, stone stone slagging is joined when blowing, slag bases has FeO, SiO2, CaO. The broken bits in blowing be arrive from weak acid alkali sex, so requirement lining has the good performance that fights basic slag.
Of magnesian chromic brick be able to bear or endure urgent cold urgent hot sex is good, wearability is good, it is better to have fight basic slag to erode performance, accordingly, converter liner basically is magnesian chromic fireproof material. Of liner fragile place basically is the place such as blast tuyere and blast tuyere area, mouth and end wall. Especially blast tuyere and blast tuyere area, use condition is most slashing, also be the most fragile place. Lengthen blast tuyere and blast tuyere area to use the service life of fireproof material, can reduce the corrode damage of whole converter lining already, also can improve converter furnace life substantially. For the accuracy of the integral sex of blast tuyere and blast tuyere position, at present blast tuyere brick all becomes whole with hypostatic brick build by laying bricks or stones, special broach gets reoccupy wind eye, material uses electric frit recombine character magnesian chromic brick or chromic brick of direct union magnesium.    Cylindrical shell and end wall use chromic brick of high grade magnesium or magnesia brick in section of broken bits line. Mouth bricklaying is the position with structural the weakest intensity, especially of mouth and circular cylindrical shell have sex place, because of appearance big, brick seams the treatment difficulty of complex, brick much and master hard, mouth is the feed in raw material, passageway that pours broken bits, smoke evacuation, technology operation is very frequent, temperature change is frequent, jab of gush of cupreous broken bits, flue gas erodes, mouth clears collide mechanically and wear away, cu2S, of SO2 erode very serious, liner work requirement is very abominable. For this, step should be taken on the structure, reduce a brick as far as possible model, reduce the weak point on the structure. Choose to go up character in material, choose chromic brick of direct union magnesium entirely, improve the integral life of body of heater.
Get in Touch
Fill out the short form below and we will be in touch.
linkedin facebook pinterest youtube rss twitter instagram facebook-blank rss-blank linkedin-blank pinterest youtube twitter instagram question-circle