By pouring steel is planted smelt means and whether to need roast wait for a condition, intermediate bag distributes the following kinds of kinds roughly: (Wrap among 1) high temperature, for some setting of specific metallurgy process place uses magnesia brick liner to carry heat on the head to be controlled to 1500 ℃ . (2) heats up the bag intermediate, it is common intermediate bag, use firing brick or do not bake bricks or pouring expect liner, pouring before warm-up comes 800~1100 ℃ . (3) is cold intermediate bag, use heat insulation board to make packet of line, in pouring before can not use via warm-up.
Intermediate bag is comprised by fireproof material, include the following share roughly:
(1) heat-insulation layer (10? 30mm) , this are tightened be next to the intermediate carapace that include steel, normally asbestine of build by laying bricks or stones board, heat preservation brick or pledge gently pouring makings. The effect is adiabatic beaverboard well, thick make an appointment with 12mm, thermal conductance is low,
(Among 2) layer (100? 200mm) , layer and this heat-insulation layer photograph are contacted, its material is argillaceous brick commonly, line is among whole general, pouring stuff is ordinary pledge for tall aluminium.
(3) job layer (20? 50mm) , layer and this molten steel are contacted, it is crucial position. This liner material has half silicon stone of qualitative, candle is brick of qualitative, clay, tall aluminous brick, alkalescent brick (if magnesium is qualitative the zirconium stone brick such as the brick. Or use heat insulation board: Silicon pledges heat insulation board, magnesium pledges heat insulation board, magnesian olivine pledges heat insulation board. Or with coating: Magnesian qualitative, magnesian chromium reachs magnesian calcic qualitative coating to wait character, at present useful also and pouring expect intermediate bag liner,
(4) brick, enchase at intermediate bag bottom, bag water mouth is used among installation, its material pledges for tall aluminium normally.
(5) includes a copy, its material comparatives basically with working layer character, layer of the job end intermediate bag bag suffers molten steel to pound place easy attaint, the requirement is fought erode wear-resisting caustic, use tall aluminous brick commonly or compact tall aluminous brick and aluminous chromic brick, also use the magnesia brick of high strenth tar of tailor-made chunk. Molten steel pounds place also Zuo increases with zirconium stone brick.
(6) wraps a lid to enclothe inter bag to go up, can rise heat preservation and prevent the action such as molten steel flying to irrigate, its material uses clay to pledge normally character or tall aluminium pledges fireproof and pouring makings the lid that make a package.
(7) blocks broken bits wall (lasher) , this wall build by laying bricks or stones within intermediate bag, can be single wall, also can be double wall, the wall that block broken bits (lasher) material is qualitative, it is tall aluminous brick normally, also can make prefab piece, its purpose is to use those who block broken bits. Spend to raise the cleanness of molten steel, still can install molten steel filter on the wall that block broken bits.
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