CN2538806Y

CN2538806Y - Double-blasting fast-smelting blast furnace

Info

Publication number: CN2538806Y
Application number: CN 01279863
Authority: CN
Inventors: 卢云光
Original assignee: Individual
Current assignee: No 12 Building 10 Dadukouyueguang Village Chon
Priority date: 2001-12-28
Filing date: 2001-12-28
Publication date: 2003-03-05
Anticipated expiration: 2011-12-28

Abstract

The utility model relates to a double heating and fast refining blast furnace, which can settles the disadvantages of single heating, slow refining, low yield, high consumption and low benefit of the prior high furnaces. On the prior blast furnaces, the big circular air duct and the pipe branches of the air port are all arranged on a circumference plane, and the hot blast sent into the furnace is also centralized on the plan. Just when the charge goes to the filmy high temperature melting zone, the charge can be melted and then sink into the crucible. Refining iron with coke is the second combustion of coal, so the consumption is great and the firepower is not enough. With the added coal dust or coal gas, the effect of the prior blast furnaces is not ideal yet. The utility model is characterized in that: at the proper position above the present big circular air duct, another same big circular air duct and a plurality of pipe branches of the air port are added; a wind brake is arranged on the chief pipe connecting the air duct and the hot blast stove, so as to regulate the air volume and the temperature in the furnace. Adopting the double air ducts to refine pig iron, the utility model has the advantages of double heating, fast refining, high yield, low consumption and high profit. The efficacy of the prior technology is increased greatly.

Description

Double-blasting fast-smelting blast furnace

Affiliated technical field

The utility model relates to a kind of smelting new technology of existing blast furnace, can realize the Double-blasting fast-smelting blast furnace of fast refining, high yield, low consumption, high benefit.

Background technology

As everyone knows, existing blast furnace all is to adopt a big circular duct of circle and more piece arm to be communicated with the air port of furnace wall, and the wind conveying pipe of hotblast stove is communicated with big circular duct and hot blast cooked a meal into smelts operation in the stove.This single tube air supply mode follows so far and did not change.Found the state so far, especially "Patent Law" is since the execution on April 1 in 85 year, and former patent newspaper now be intellectual property newspaper, invent and authoritative newpapers and periodicals such as innovation, there is no to step on the change report of air supply line system of blast furnace both domestic and external.Its subject matter is: ore fusion slowly, grow, yield poorly, consume height, of poor benefits, the potentiality that can not give full play to blast furnace tap to tap time.

Summary of the invention

Technical problem to be solved: the key of blast-furnace smelting is: strong wind, high temperature, fine fodder.At present, the blast furnace of state-owned big-and-middle-sized iron and steel enterprise has generally all reached this requirement, and still, its effect is still not ideal enough, and the annual utilization coefficient is difficult to reach more than 1: 2.Its reason of opinion: the one, the refining of cooking a meal of single airduct air feed, its air port all on a planar circumferential line, cause furnace high-temperature melting range section shallow, and blast furnace is very high, hot blast is cooked a meal in the stove also mainly in this shallow-thin layer, and charge goes downwards to could be burnt here for liquid and sinks to cupola well; The 2nd, coke ironmaking is burning for the second time, and it is relatively poor that its heat is imitated function, especially lacks flame resistivity and reserve strength, more do not have robust flame to upper punch, the above crude fuel of pre-heating duct, and cupola well also can be suffered from cold sometimes, produces some faults.Generally speaking, the firepower deficiency, oligopepsia, output are not high.Therefore, blast furnace both domestic and external is all adding Coal powder spray or coal gas.At present ubiquitous be singly cook a meal, refining slowly, low yield, high consumption, poor benefit problem.

Solve the technical scheme that its technical problem adopts: the technical scheme that the utility model adopted is: under the prerequisite that does not change at the existing air supply line of blast furnace system and other each position, set up a new air supply line system identical with former pipeline, adopt the refining of cooking a meal of two airducts, the capacity of its stove stomach and digestion ability are comparable to be twice originally.The two-tube wind of cooking a meal is means, and refining high yield soon is purpose, realizes by blast furnace, so cry: Double-blasting fast-smelting blast furnace.Its technical characterictic is: the appropriate location (deciding according to the blast furnace size) on the big circular duct of the existing circle of blast furnace, newly establish identical therewith airduct and the air port arm of a circle, be fixed on the steel bracing frame on the outer cover of steel plate of blast furnace circumference, should there be the suitable gradient that dips down in its arm and air port, ore speed hot melt is separated, and wind power energy affects crude fuel descending, can prevent that the air port from stopping up and the hanging fault; Newly-increased air port of going up the circle airduct should enclosed down between the air port of airduct, the air port should be arranged in a crossed manner up and down, can not overlap, can form cook a meal refining zone of a hot blast that increases newly thus, the expansion section s of stove gastric capacity just, can not only keep the up and down hot blast rate in zone and the equilibrium of temperature, and can will go up the thermophilic digestion regional integration that infracommissure becomes the original twice speed heat of ratio, softening, semi-molten, running down, just can give full play to the potentiality of blast furnace; Newly-increased circular duct leads between the house steward of hotblast stove, and air lock should be installed, so that regulate hot blast rate and temperature in the stove.

Beneficial effect against existing technologies: the beneficial effects of the utility model are: many one times of the hot blast rate of supply blast furnace, the fast hot melt of crude fuel separate layer thicken one times, high temperature melting zone expand be twice, ore scorification speed is fast again, the temperature in the stove also can significantly improve, can reduce or avoid the obstruction in iron notch, slag notch, air port to damage fault, can give full play to the potentiality of blast furnace, reach two and cook a meal, the purpose of refining, high yield soon.Significantly technique effect will inevitably produce significant output value benefit.Can not only increase considerably pig iron output, and can reduce consumption, especially can reduce coke ratio, because of the burnt amount of iron output and consumption is inverse ratio, output is high more, and coke ratio is low more, not only can save a large amount of coke, and blast furnace need not add Coal powder spray or coal gas again, reach dual energy-conservation purpose.High yield, low consumption, high benefit are total beneficial effects.

Description of drawings

Fig. 1: the blast furnace front view, only painted cupola well, furnace bosh, three positions of shaft, furnace roof and this case are irrelevant, the Therefore, omited; Fig. 2; It is the vertical view of Fig. 1; Fig. 3: be the vertical cross-sectional of Fig. 1, promptly therefrom analyse and observe to the iron notch right side from the hotblast stove left side.Blast furnace is a round, and is identical all around, be built on the reinforced concrete seat, the Therefore, omited left and right side view and upward view.The label 1-11 of Fig. 2 and Fig. 3 is consistent with the label 1-11 of Fig. 1.

Fig. 1-1 is an iron notch; Fig. 1-2 is the cupola well position; Fig. 1-3 is a slag notch; Fig. 1-4 is the original big circular duct of blast furnace; Fig. 1-5 is the arm and the air port of original big circular duct; Fig. 1-6 is the furnace bosh position; The big circular duct of Fig. 1-7 for newly establishing; Fig. 1-8 is the arm and the air port of the big circular duct newly established; Fig. 1-9 is the shaft position; Fig. 1-10 is the house steward that original big circular duct is communicated with hotblast stove, and hot blast house steward thus leads to the big circular duct of Fig. 1-4, again in stove is cooked a meal in Fig. 1-5 arm and air port; The house steward that Fig. 1-11 is communicated with hotblast stove for the big circular duct newly established, hot blast is the big circular duct newly established towards Fig. 1-7 of house steward thus, again in stove is cooked a meal in Fig. 1-8 arm and air port.

Embodiment

1, with reference to existing big circular duct, carry out second big circular duct of circle and the air port arm in advance, there is the suitable gradient that dips down in its arm and air port.

2, calculate wind speed, the air quantity of existing blower fan in advance, can be enough? so that take measures;

Can 3, appearance air quantity, the wind-warm syndrome of many hotblast stoves reach requirement? also should carry out prediction work.

4, utilize the blast furnace overhaul chance, install the big circular duct of second circle.The igniting baker is finished in overhaul, treat that stove fire is vigorous after, progressively open the air lock that encloses airduct again, the Double-blasting fast-smelting blast furnace commencement of commercial operation.

5, state-owned iron and steel enterprise blast furnace is more, and the overhaul time is in turn arranged.Machinery, equipment leave the factor of assurance about 50% when design, above-mentioned 2,3 is for precautions averts perils.

Claims

A kind of Double-blasting fast-smelting blast furnace, be that a same air supply line system is set on the air supply line system of blast furnace, be fixed on the steel bracing frame on the outer cover of steel plate of blast furnace circumference, just be and be Double-blasting fast-smelting blast furnace, it is characterized in that: air supply line system that this kind blast furnace is many, manifest is that two pipelines are vertically overlapping, two airducts laterally arranged side by side are the cook a meal innovation blast furnace of refining of air feeds simultaneously, on enclose the arm of airduct and lead to into that should there be downward obliquity in the interior air port of stove, enclose up and down the air port of airduct should be arranged in a crossed manner can not be overlapping, the newly-increased big circular duct of circle of going up should be installed air lock towards between the house steward of hotblast stove.