CN2625392Y

CN2625392Y - Oxygen side-blowing direct lead-smelting furnace

Info

Publication number: CN2625392Y
Application number: CN 03246213
Authority: CN
Inventors: 杜天贞; 宾万达; 蔺公敏
Original assignee: HENAN XINXIANG CHINA UNITED CORP
Current assignee: HENAN XINXIANG CHINA UNITED CORP
Priority date: 2003-07-23
Filing date: 2003-07-23
Publication date: 2004-07-14
Anticipated expiration: 2013-07-23

Abstract

The utility model discloses an oxygen side-blown lead smelting furnace, comprising a hearth, a charging door, a jacket, a smoke extraction vent, a lead inlet port, and a slag hole. The utility model is characterized in that at least two upper air outlets in one line and two lower air outlets in one line are arranged at two sides of the upper and the lower parts of the furnace; the hearth bottom is divided into a high hearth bottom and a low hearth bottom, while an inclining plane is connected between the high hearth bottom and the low hearth bottom through a transitioning way. The lower air outlet is provided with a low tuyere and a high tuyere, the high hearth bottom is matched with the high tuyere of the lower air outlet, while the low hearth bottom is matched with the low tuyere of the lower air outlet. The utility model adopts the oxygen side-blown melting technology which has fewer demands to the charge. The gradation can reach 20mm and the water content can reach 8 percent. The furnace produces no matte, and the middle layer which is formed in the furnace can be avoided and eliminated by the high and low hearth bottoms and the higher and lower air outlets.

Description

Oxygen side-blown direct lead smelting furnace

Technical field:

The utility model relates to a kind of Non-ferrous Metallurgy industry and reclaims plumbous smelting furnace, especially a kind of bath smelting oxygen side-blown direct lead smelting furnace from lead sulfide mining and metallurgy refining with from the secondary raw material of lead.

Background technology:

In the plumbous industry of refining, since the eighties in last century, directly refining is plumbous without sintering abroad to have concentrate of lead sulfide ore successively.Oxidizing semlting adds electric furnace reduction dilution slag method-Kivcet stove as the oxygen flash, SKS (mountain, the mouth of a river) stove of oxygen bottom blowing smelting bath smelting process-QSL stove and China, and oxygen top blown smelting bath smelting process-Kaldo stove, ISA stove.These stoves have all been save sintering circuit when producing, smelt directly into stove with concentrate to obtain metallic lead, so these methods claim that again directly refining is plumbous.Bath smelting furnace can be divided into top blast stove and bottom convertor again by the position that blasts burner hearth with oxygen.

Directly refine plumbous metallurgical furnace, owing to utilized the oxidation reaction heat of lead ore concentrate self fully, thereby when melting, only need replenish small amount of fuel, energy-saving effect is very remarkable.Because metallurgical furnace has all utilized industrial oxygen, with the traditional method ratio, the exhaust gas volumn of generation is few, the SO in the flue gas ₂The concentration height, SO ₂Help recycling, solved problem of environmental pollution more up hill and dale.But these furnaces all also have weak point: furnace charge is required harsh, furnace charge will be finely ground to below the particle diameter 0.07mm, depth drying to water content less than 0.5%; oxygen top blown and bottom convertor; spray gun structure complexity, need nitrogen protection, the life-span is short, influences blowing time ratio.

Summary of the invention:

The utility model is intended to provide a kind of novel direct lead-smelting furnace, and it need not any processing treatment to raw material, and not severe to the moisture requirement of raw material.The secondary raw material of lead ore and lead can be finished smelting process directly into stove.This stove adopts oxygen blast from the side, and the air port need not nitrogen protection.

Task of the present utility model is achieved in that oxygen side-blown direct lead smelting furnace, and it includes: cupola well, charging opening, water jacket, smoke outlet, lead outlet, slag notch.It is characterized in that: the both sides, upper and lower of body of heater respectively have at least two be a row on exhaust outlet and at least two be a following exhaust outlet of arranging; Furnace bottom is divided at the bottom of the blast furnace and low furnace bottom, links to each other for the transition of domatic face at the bottom of the blast furnace with between the low furnace bottom; Low air port and high air port are arranged in the following exhaust outlet, and correspondence down the high air port in the exhaust outlet at the bottom of the blast furnace, and low furnace bottom correspondence down the low air port in the exhaust outlet.

The utility model adopts the oxygen side blow fused bath smelting technique, and not severe to the requirement of furnace charge, granularity can reach 20mm, and moisture content can be up to 8%, and stove does not produce matte, and height furnace bottom that the middle layer that forms in the cupola well can be provided with by stove and height air port are avoided and eliminated.

Description of drawings:

Fig. 1 looks cross-sectional view for the utility model right side, and Fig. 2 looks cross-sectional view for the utility model master, and Fig. 3 is an A-A sectional view among Fig. 1.Among the figure: 1. 10. domatic faces, 11. low furnace bottom 12. slag siphonic water-collecting wells 13. slag-drip openings 14. side's copper pipes 15. peep holes 16. water jackets 17. smoke outlets 18. safety were put plumbous mouthful 19. plumbous siphon 20. lead outlet at the bottom of exhaust outlet 3. secondary combustion zone 6. times exhaust outlet 6A. in 4. bubbling areas, 5. molten bath district hanged down the high air port of air port 6B. 7. safe slag notch 8. cupola wells 9. blast furnaces on the charging opening 2..

Embodiment:

The utility model is a kind of vertical heater, and its charging opening 1 is located at the top of stove, and furnace charges such as lead ore concentrate, flux, coal are added in the burner hearth from charging opening 1, for preventing mishap, can also be provided with standby charging opening at the side of charging opening 1.The both sides, top of body of heater respectively are provided with exhaust outlet 2, and the quantity of every exhaust outlet has two at least.Can in burner hearth, blast air or the oxygen-rich air that supplies secondary combustion by last exhaust outlet 2.Below secondary combustion zone 3, promptly the middle and lower part of body of heater is a bubbling area 4, joins furnace charge lead ore concentrate the body of heater, flux, coal etc. from furnace roof and carry out oxidation or reduction reaction in the slag blanket of bubbling.Smelting zone 5 is in the bottom of body of heater, and lead and slag are isolated in the overheated and melting of furnace charge acquisition high temperature melting in this district.Respectively there is exhaust outlet 6 both sides, bottom of body of heater, and the quantity of every exhaust outlet also has two at least, and following exhaust outlet 6 is not on a horizontal plane, and low air port 6A is lower, and 6B position, high air port is higher.Cupola well 8 is for refractory materials is built into, and the bottom of cupola well 8 not in one plane is not divided at the bottom of the blast furnace 9 and low furnace bottom 11, at the bottom of the blast furnace 9 and low furnace bottom 11 between connect by

domatic face

10,9 correspondences high air port 6B at the bottom of the blast furnace, stove low 11 correspondences in the end low air port 6A.The slag cylinder is inhaled well 12 in the bottom of body of heater, and its exit end is a slag-drip opening 13, owing to constantly add the pressure of furnace charge in the burner hearth, slag is discharged from slag-drip opening 13 continuously by slag siphonic water-collecting well 12.Stove headwall by the siphonic water-collecting well end is rearranged by the square copper pipe 14 of being with water-cooled.Peep hole 15 is in order to observe burning and the setting of air-flow situation in the burner hearth.16 minutes three joints of water jacket are provided with assembling and constitute body of heater, can select for use different metallic substance to make as required.Build in the top of water jacket 16 the refractory brick insulation is arranged.The gas that produces during secondary combustion chamber 3 burning is sent to cooling dust collecting system and sulfur dioxide reclaiming system by flue interface 17, smelt the lead finished by plumbous siphon 19 outside lead outlet 20 Continuous Flow are come out of the stove.It is when need blowing out Maintenance and Repair that safe slag notch 7 and safety are put plumbous mouthful 18, respectively slag and plumbous and be provided with in the emptying stove.

When lead-smelting furnace is worked, under the effect of water jacket 16 internal recycle water coolants, make the slag in the stove on the furnace wall, form one deck duricrust, water jacket is protected, with the waterproof jacket scaling loss.Oxygen then blasts the molten bath from following exhaust outlet, meanwhile, furnace charges such as lead ore concentrate, secondary lead raw material and flux, coal are sent into burner hearth from charging opening 1, fall into smelting zone 5 and melt rapidly and form molten slag, under the effect that blasts pressure and chemical reaction of oxygen, gas makes the fierce bubbling splash of slag, finishes oxidation or reduction reaction in bubbling area 4.In smelting zone 5, the lead sulfide in the lead ore concentrate is reduced into metallic lead, grows up rapidly, descends in the slag high degree of agitation, separates with slag by the quite zone below the air port, converges at the cupola well bottom at last, discharges from lead outlet 20 by plumbous siphon 19.Slag is then discharged from slag-drip opening 13 by slag siphonic water-collecting well 12.Exhaust outlet 2 need blast quantitative air or oxygen-rich air on stove, to guarantee sulfide perfect combustion, makes the carbon monoxide perfect combustion in the furnace gas become carbonic acid gas when retailoring when oxidizing semlting.The gas that is produced during the stove internal combustion is sent to cooling dust collecting system and sulfur dioxide reclaiming system from smoke outlet 17.In the time of need observing situation in the stove, can observe so that in time adjust by the combustion gas flowing situation in 15 pairs of stoves of peep hole.When the needs blowing out, safe slag notch 7 and safety are put plumbous mouthful 18 open, the slag in the stove, plumbous emptying.

Claims

1. oxygen side-blown direct lead smelting furnace, it includes cupola well, water jacket, air port, charging opening, smoke outlet, lead outlet, slag notch, it is characterized in that: the both sides in the upper and lower of body of heater respectively have at least two to be that last exhaust outlet of the row and at least two are a following exhaust outlet of arranging; Furnace bottom is divided at the bottom of the blast furnace and low furnace bottom, is linked to each other by the domatic face at the bottom of the blast furnace with between the low furnace bottom.

2. oxygen side-blown direct lead smelting furnace according to claim 1 is characterized in that: be provided with low air port and high air port in the following exhaust outlet, low air port correspondence low furnace bottom, and high air port correspondence at the bottom of the blast furnace.