CN2606114Y - Tubular copper cooler of blast furnace - Google Patents

Abstract

The utility model relates to a tubular copper cooler of blast furnace which belongs to the metallurgy field. The structure of the utility model is that: a cooler of a jointless copper tube of thick walls added with copper ventilated rib is arranged on the bosh, furnace bosh and the bottom of the stack, and a cooler of the jointless steel tube of thick walls inside lined with thin copper pipe and added with steed ventilated rib is arranged on the middle and upper part of the stack. A thin copper tube is lined to reduce the rust and scale deposit. Because the wall of the tubular copper cooler is much thinner than that of the copper cooler, the cooling effect is good and the serving lift of the blast furnace is longer than that of the copper cooler of blast furnace. After the tube is sealed around the furnace shell and away from a certain distance, the low-cement castable is poured. The baker can be opened after the furnace is dried. Because the cost is just one fifth of the copper cooler wall and the deep low-cement castable replaces the expensive firebrick, the fee for newly building and heavy repair is greatly reduced.

Description

Blast furnace tubular type copper water cooler

The utility model belongs to field of metallurgy, particularly the water cooler of blast furnace.

The rational and effective cooling is the key of blast furnace longevity.Traditional cooling stave is made with graphitic cast iron, replaces graphitic cast iron with spheroidal graphite cast iron afterwards, develops into steel cooling wall and copper cooling plate at present, up-to-date use be copper cooling wall.The common drawback of first three kind is that thermal conductivity is low, water coolant easily on irony fouling then aggravated total thermal conductivity and reduced.When making cooling stave, the coating for preventing that the carburizing of cast-iron cooling wall iron pipe from being done has increased entire thermal resistance again.Copper cooling plate and copper cooling wall good cooling results, but cost is too high, especially with copper cooling wall for very, this hangs back numerous producers.

The blast furnace tubular type copper water cooler that the utility model provides can replace copper cooling wall fully, and cost is 1/5th of a copper cooling wall.With tubular type copper water cooler matches be, replace expensive refractory brick with low cement deposit material, this has saved a spending again greatly.

The blast furnace tubular type copper water cooler that the utility model provides is by using the position to be divided into two kinds of structures.First kind is used for bosh, furnace bosh and the restoration of lower stack that heat flow rate per unit area is big, be easy to generate slag crust, and shown in accompanying drawing 1,2, material is a TU2 oxygen free copper thick-wall seamless; Second kind is used for the shaft middle and upper part, and material is the 20G thick-walled seamless steel pipes, and liner TU2 approaches copper pipe, and shown in accompanying drawing 3,4, the thin copper pipe of lining is in order to alleviate corrosion and fouling.Because tubular type copper water cooler is much thinner than copper cooling wall, so cooling performance can be better, and will be longer than the copper cooling wall blast furnace blast furnace campaign.Below with 1200m ³Blast furnace is an example, is described further in conjunction with the accompanying drawings.

Fig. 1 is a tubular type copper cooler construction.1 is  90 * 15 seamless copper pipes among the figure, material TU2, and width between centers 1800, two ends radius-of-curvature are 220, two ends straight section size is decided on hearth structure.2 for being welded on 150 * 70 * 10TU2 copper coin on the copper pipe, plays increase area of dissipation and fixing mould material.Fig. 2 is the enlarged view of A-A among Fig. 1.Fig. 3 is an edge copper pipe formula water cooler in the shaft middle and upper part.Outer tube is  89 * 12 material 20G weldless steel tubes, the same Fig. 1 of physical dimension.Fig. 4 is the enlarged view of B-B among Fig. 3, and 3 is  65 * 2.5TU2 seamless copper pipe among the figure, and the heating panel size is with among Fig. 12, and material is the Q235 steel.

During installation, the furnace shell perforate is passed at the pipe two ends, inside and outside two-sided welding, pipe is in furnace shell circumferential direction spacing about 200, and the pipe medullary ray is apart from furnace shell inwall about 210.After welding is finished, inject low cement deposit material, thick about 400, through seasoning in a few days, treat to get final product blow-on behind the whole baker.Requirement to low cement deposit material: 1500 ℃ of use temperatures, amount of water 6.5-7.5% burns 1450 ℃ * 3h of back velocity of variation ± 0.5%, 110 ℃ * 24h2.65g/cm of volume density ³, 1450 ℃ * 3h 2.60g/cm ³, compressive strength 11O ℃ * 24 35Mpa, 1450 ℃ * 3h 45Mpa, 110 ℃ * 24h of folding strength 4.5Mpa, 1450 ℃ * 3h5Mpa, AL2O3 content 〉=65%.

Pipe bends: but the copper pipe clod wash.Multiple-unit tube can bend with the medium frequency bending of pipe machine.

The welding of copper pipe and box hat: prefabricated some internal diameters are slightly smaller than the short steel pipes (being longer than furnace shell thickness 20) of copper pipe external diameter, burn and squeeze into the copper pipe joint place after red, will combine closely after the cooling.Welding short steel pipes and furnace shell perforate.

The thin copper pipe of edge in the steel pipe: thin copper pipe external diameter is chosen less than size 0.5-1.O, penetrate steel pipe after, end sealing is suppressed to 8-10Mpa to the other end water flowing, stops 5 minutes, approaches the copper pipe outer wall and will closely contact with the steel pipe inwall.

Claims (2)

1, a kind of blast furnace tubular type copper water cooler is characterized in that adding the copper heating panel at bosh, furnace bosh and restoration of lower stack with the heavy wall seamless copper pipe constitutes, and at the furnace shell circumferential direction with after the welding of furnace shell certain distance is finished, injects low cement deposit material.

2, blast furnace tubular type copper water cooler as claimed in claim 1 is characterized in that adding the steel heating panel in the shaft middle and upper part with the thin copper pipe of thick-walled seamless steel pipes liner constitutes, and at the furnace shell circumferential direction with after the welding of furnace shell certain distance is finished, injects low cement deposit material.

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