CN212713694U - Blast furnace recycling smelting equipment for lead-containing materials - Google Patents
Blast furnace recycling smelting equipment for lead-containing materials Download PDFInfo
- Publication number
- CN212713694U CN212713694U CN202021996373.6U CN202021996373U CN212713694U CN 212713694 U CN212713694 U CN 212713694U CN 202021996373 U CN202021996373 U CN 202021996373U CN 212713694 U CN212713694 U CN 212713694U
- Authority
- CN
- China
- Prior art keywords
- lead
- furnace
- recovery system
- blast furnace
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A blast furnace recovery smelting device for lead-containing materials belongs to the technical field of environmental protection and comprises a blast furnace, a powder storage tank, a mixer, a coal injection distributor, a lower annular flue, an upper annular flue, a furnace gas lead recovery system I, a furnace gas lead recovery system II, an air blower I, an air blower II and a nitrogen sweeper. The utility model discloses utilize blast furnace smelting process to smelt the recovery to containing lead material, utilize the lead vapor atmospheric pressure difference that flue gas temperature difference produced in the blast furnace, will contain lead furnace gas part and introduce lead recovery system and retrieve repeatedly. The utility model discloses when smelting steel, carry out recovery processing to old and useless battery, kill two birds with one stone. And lead pollution to coal gas and slag is avoided, the lead content of molten iron is not increased, and the energy consumption is low. The utility model has no secondary pollution risk, and lead emission is almost zero; the existing iron-making blast furnace is utilized for transformation, so that the investment is low and the operation cost is low; no waste is produced.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, in particular to contain blast furnace recovery smelting equipment of lead material.
Background
In recent years, due to the rapid development of automobiles and electric vehicles, the amount of waste storage batteries is increased sharply, the waste batteries mainly contain lead metal and lead sulfate waste liquid except a part of plastic shells, and because lead is heavy metal, the battery waste belongs to dangerous waste. The existing lead-containing hazardous waste treatment technology has the problem of flue gas treatment, because the low-temperature steam pressure of lead is very high, heavy metals in the flue gas hardly reach the standard, particularly, the treatment of lead sulfate waste liquid is almost a lead smelting process, the process pollution is difficult to control, and the energy consumption is high. Therefore, in order to solve the problem of environmental protection, the development of an environment-friendly lead-containing material smelting technology is urgently needed.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a contain blast furnace recovery smelting equipment of lead material, utilize blast furnace smelting process to contain lead material and smelt the recovery, utilize the lead vapor pressure difference that flue gas temperature difference produced in the blast furnace, lead recovery system is introduced to the furnace gas part that will contain lead and retrieve repeatedly, then in the burner gas after will retrieving lead refeeds back stove, lead vapor that is not caught gets into the stove after in-process is caught by low temperature furnace charge along with stove gas rising, then follow the furnace charge down again by gasification, be retrieved once more, lead can't escape from the stove, the furnace gas is blast furnace gas, go out whole recycle behind the blast furnace, the lead component that does not contain in the blast furnace gas of recovery, consequently, gas combustion does not have lead pollution to take place. The specific technical scheme is as follows:
a blast furnace recycling smelting device for lead-containing materials comprises a blast furnace 1, a powder storage tank 2, a mixer 3, a coal injection distributor 4, a lower annular flue 5, an upper annular flue 6, a furnace gas lead recycling system I12, a furnace gas lead recycling system II 13, a blower I14, a blower II 15 and a nitrogen sweeper 16;
a feed inlet 7 is formed in the top end of the blast furnace 1, and a lead discharging port 8 is formed in the furnace wall of the bottom end of the blast furnace; a melting section of the blast furnace 1 is provided with a furnace wall blowing feeding hole 9, a transition section is provided with a furnace wall air guiding hole 10 at the furnace temperature of 800-650 ℃, and a transition section is provided with a furnace wall air returning hole 11 at the furnace temperature of 600-350 ℃;
the powder storage tank 2 is provided with a gas conveying system; the coal injection distributor 4 is connected with a coal injection gun;
the furnace gas lead recovery system I12 consists of a lead collector 12.1 and a lead collecting groove 12.2 arranged at the bottom of the lead collector 12.1, wherein the upper part of the lead collector 12.1 is provided with a diffusion pipe, and the diffusion pipe is provided with a diffusion valve 12.3; the lead collecting tank 12.2 is provided with a lead discharging pipe, and the lead discharging pipe is provided with a discharge valve 12.4;
the furnace gas lead recovery system II 13 consists of a lead collector 13.1 and a lead collecting groove 13.2 arranged at the bottom of the lead collector 13.1, wherein the upper part of the lead collector 13.1 is provided with a diffusion pipe, and the diffusion pipe is provided with a diffusion valve 13.3; the lead collecting tank 13.2 is provided with a lead discharging pipe, and the lead discharging pipe is provided with a discharge valve 13.4;
the feed inlet 7 of the blast furnace 1 is connected with an external waste storage battery polar plate treatment system 25 through a pipeline; a feed port at the top end of the powder storage tank 2 is connected with an external waste storage battery waste liquid dried substance crushing system 26 through a pipeline, and the waste storage battery waste liquid dried substance crushing system 26 is connected with a waste storage battery waste liquid treatment system 27;
a discharge port at the bottom end of the powder storage tank 2 is connected with an inlet of a mixer 3 through a pipeline, an outlet of the mixer 3 is directly connected with a coal injection distributor 4, the coal injection distributor 4 is connected with a coal injection gun through a branch pipe, and the coal injection gun is inserted into a furnace wall injection feed hole 9;
the furnace wall air introducing hole 10 is connected with a lower annular flue 5 through a branch pipe, and the lower annular flue 5 is connected with a flue gas inlet of a furnace gas lead recovery system I12 and a flue gas inlet of a furnace gas lead recovery system II 13 through a three-way pipeline branch; the smoke outlets of the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 are connected with an annular flue 6 in a combining way through a three-way pipeline, and the upper annular flue 6 is connected with a furnace wall air return hole 11 through a branch pipe;
the nitrogen sweeper 16 is respectively connected with the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 through pipelines, and a valve 16.1 is arranged on a connecting pipeline of the nitrogen sweeper 16 and the furnace gas lead recovery system I12; a valve 16.2 is arranged on a connecting pipeline of the nitrogen sweeper 16 and the furnace gas lead recovery system II 13;
the air blower I14 is connected with the furnace gas lead recovery system I12 through a pipeline, and the air blower II 15 is connected with the furnace gas lead recovery system II 13 through a pipeline;
a branch connecting pipeline of the lower annular flue 5 and the furnace gas lead recovery system I12 is provided with a first smoke inlet valve I17 and a second smoke inlet valve I18; a branch connecting pipeline of the annular flue 5 and the furnace gas lead recovery system II 13 is provided with a first smoke inlet valve II 19 and a second smoke inlet valve II 20; a branch connecting pipeline of the furnace gas lead recovery system I12 and the upper annular flue 6 is provided with a first smoke outlet valve I21 and a second smoke outlet valve I22; a branch connecting pipeline of the furnace gas lead recovery system II 13 and the upper annular flue 6 is provided with a first smoke outlet valve II 23 and a second smoke outlet valve II 24;
a valve is arranged on a connecting branch pipe of the lower annular flue 5 and the furnace wall air-introducing hole 10; a valve is arranged on a connecting branch pipe of the upper annular flue 6 and the furnace wall air return hole 11;
valves are arranged on the connecting and combining pipelines of the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 and the upper annular flue 6;
the number of the furnace wall blowing feeding holes 9 is N, and N is more than or equal to 2; the number of the coal injection guns is the same as that of the furnace wall injection feeding holes 9; the coal injection gun is a heat-resistant stainless steel pipe;
the number of the furnace wall air holes 10 is M, and M is more than or equal to 2; the inner side of the lower annular flue 5 is provided with holes with the same number as the furnace wall air-guiding holes 10;
the number of the furnace wall air return holes 11 is M, and M is more than or equal to 2; the inner side of the upper annular flue 6 is provided with holes with the same number as the furnace wall air return holes 11;
and motors of the blower I14 and the blower II 15 are variable frequency motors.
A blast furnace recovery smelting method of a lead-containing material adopts the blast furnace recovery smelting equipment of the lead-containing material, and the method comprises the following steps:
splitting the waste storage battery, pretreating a polar plate of a large lead plate in a waste storage battery polar plate treatment system 25, and cutting the large lead plate into small blocks convenient for feeding to obtain a pretreated polar plate material; waste liquid in the waste storage battery consists of lead sulfate, sulfuric acid and water, the waste liquid is pretreated in a waste storage battery waste liquid treatment system 27, the waste liquid is mixed with lime powder to prepare mixed solid of calcium sulfate, calcium hydroxide, calcium oxide and lead sulfate, then the mixed solid is crushed in a waste storage battery waste liquid dried matter crushing system 26, and the crushing granularity is less than or equal to 80 meshes to obtain pretreated powder;
adding the pretreated plate material into a blast furnace 1 through a feeding system through a feeding hole 7; adding the pre-treatment powder into a powder storage tank 2 through a pipeline, conveying the pre-treatment powder into a mixer 3 through the pipeline by a gas conveying system of the powder storage tank 2 for mixing, then spraying the pre-treatment powder into a coal injection distributor 4 along with injected fuel, distributing the pre-treatment powder to a coal injection gun through the coal injection distributor 4, and finally spraying the pre-treatment powder into a blast furnace 1 through a furnace wall injection feeding hole 9;
normally smelting iron in a blast furnace 1, wherein smelting furnace materials comprise sintered ore, pellet ore, porous coke and smelting solvent, the temperature of molten iron at the bottom of the blast furnace is 1400-1500 ℃, the temperature of a coal injection tuyere area, namely the temperature of a furnace wall injection feeding hole 9 area is 1800-2300 ℃, the smoke discharge temperature at the furnace top is 150-250 ℃, and the reducing atmosphere is in the furnace;
(1) the metal lead in the pole plate material added through the feed inlet 7 starts to melt at 327 ℃, passes through the furnace burden, flows to the lower part of the furnace and sinks into the furnace bottom; meanwhile, a small amount of lead is vaporized and raised at high temperature in the downward flowing process, lead steam is adsorbed by a plurality of layers of porous coke and sinter in the raising process or is cooled and solidified on the surface of a furnace charge by a low-temperature furnace charge, then the lead steam descends along with the furnace charge, the temperature rises after descending, the lead is vaporized again, finally the lead is balanced in different temperature areas, lead-containing flue gas at a temperature area of 800-650 ℃ in the blast furnace 1 is led out through a furnace wall air-leading hole 10 and enters a lower annular flue 5;
(2) the lead sulfate sprayed into the mixed powder in the blast furnace 1 is rapidly decomposed into sulfur oxide and lead oxide at the temperature of over 1800 ℃, then the lead oxide is changed into gas and is reduced into metallic lead by carbon monoxide and carbon, the metallic lead is vaporized, and the lead vapor is condensed into liquid lead when meeting low-temperature furnace burden after rising, and then flows downwards and sinks into the furnace bottom; the sulfur oxide is reduced into hydrogen sulfide and carbonyl sulfide which are discharged out of the furnace along with furnace gas, and the hydrogen sulfide and the carbonyl sulfide are captured and removed by a coal gas desulfurization link or absorbed by molten iron, so that the molten iron is increased in sulfur; calcium sulfate in the mixed powder enters the slag; calcium hydroxide in the mixed powder is decomposed into water and calcium oxide, and the calcium oxide enters a bottom molten pool along with iron dropping from the soft melting zone and is captured by slag to become a slagging material;
and 4, recovering:
starting the furnace gas lead recovery system I12 or the furnace gas lead recovery system II 13, firstly connecting the nitrogen sweeper 16 with a high-pressure nitrogen source, opening a nitrogen valve 16.1 or a nitrogen valve 16.2, opening a diffusion valve 12.3 or a diffusion valve 13.3, injecting nitrogen into the furnace gas lead recovery system I12 or the furnace gas lead recovery system II 13, and replacing air with nitrogen; then, starting the blower I14 or the blower II 15; then opening a first smoke outlet valve I21 and a second smoke outlet valve I22 or opening a first smoke outlet valve II 23 and a second smoke outlet valve II 24, finally gradually opening a first smoke inlet valve I17 and a second smoke inlet valve I18, or gradually opening a first smoke inlet valve II 19 and a second smoke inlet valve II 20, and controlling the smoke output to be 20-30% by controlling the smoke inlet valves; leading out flue gas to enter a furnace gas lead recovery system I12 or a furnace gas lead recovery system II 13 through a pipeline, cooling and capturing lead, zinc, cadmium and light metal oxides and salts, and leading the cooled lead liquid, zinc, cadmium and light metal oxides and salts to flow into a lead collecting tank 12.2 or a lead collecting tank 13.2; the unliquefied flue gas in the furnace gas lead recovery system I12 or the furnace gas lead recovery system II 13 enters the upper annular flue 6 through a pipeline and is led back to the blast furnace 1 through the furnace wall air return hole 11.
In the method, the pressure of the smoke led out from the furnace wall air-leading hole 10 and decompressed by the pipeline resistance and the resistance of the furnace gas lead recovery system is larger than the pressure of the smoke in the furnace at the furnace wall air-returning hole 11;
in the method, the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 adopt tubular or plate heat exchange for cooling;
in the method, the cooling media of the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 are air-cooled, and the air source is provided by an air blower I14 or an air blower II 15.
The utility model discloses a contain blast furnace recovery smelting equipment of lead material, compared with the prior art, beneficial effect is:
firstly, there will be a small amount of lead in the normal iron-making furnace charge, there is partial lead deposit at the bottom of the furnace, so lead in the molten iron is basically the saturated state, the utility model discloses the equipment can not produce the loss of lead, can improve lead recovery volume.
And secondly, mixing the waste liquid in the storage battery with lime powder, reacting calcium oxide in the lime powder with sulfuric acid in the waste liquid to generate calcium sulfate, reacting water in the waste liquid with calcium oxide to generate calcium hydroxide, forming the mixture into dry lead sulfate, calcium hydroxide and calcium oxide, crushing the mixture into powder, facilitating feeding and maintaining a stable blast furnace smelting environment.
Thirdly, because the addition of lead sulfate and calcium sulfate, there is partial sulphur to be absorbed by the molten iron and get into the molten iron, makes the molten iron resulfurize, so the utility model discloses the molten iron sulphur content of equipment output is than higher, and the molten iron of production can be used for the foundry goods production that requires not high to the sulphur.
Fourthly, because the temperature of the top of the blast furnace is lower, the temperature generally can not exceed 250 ℃, and the vapor pressure of lead is almost zero at the temperature. The lead recovery treatment is completed in the blast furnace, so the vapor pressure of lead in the upper part of the blast furnace is in an unsaturated state, and zinc and cadmium metals which are more active than lead exist in the furnace, so lead oxide is not generated. Lead can not be detected in the coal gas in actual operation, and the normal operation of the blast furnace is ensured.
And fifthly, because the lead sulfate sprayed into the furnace is decomposed into gaseous substances and does not have a chance to enter the slag, the lead does not cause the over-standard discharge of the blast furnace slag. In actual operation, the lead content of the slag is not increased, so that the slag is ensured to be harmless.
Six, the utility model discloses equipment draws forth the flue gas mode and sets up a plurality of induced air holes around the blast furnace oven, and the trompil is more, and it is better to remove the plumbous effect, and is less to blast furnace operation influence, and the quantity of specific trompil is decided according to equipment size and cost, and the design is nimble.
Seventhly, the utility model discloses a two sets of burner gas lead recovery systems, the implementation is used one and is equipped with, and alternate use prevents that equipment from becoming invalid, the continuous production of being convenient for.
And eighthly, the equipment for recovering lead is attached to the iron-making process, is not special lead production equipment, and has no requirement on recovery rate, so that the temperature drop of coal gas can be reduced as much as possible under the condition of ensuring the air permeability of furnace charge, the heat loss is reduced, more furnace gas is required to be led out when the air permeability of the blast furnace is poor, the lead vapor pressure in the furnace is reduced at an accelerated speed, and less furnace gas can be led out when the air permeability of the blast furnace is normal. Flexible adjustment and operation cost saving.
Nine, when smelting steel, carry out recovery processing to old and useless battery, kill two birds with one stone. And lead pollution to coal gas and slag is avoided, and the content of lead in molten iron is not increased, so that the method is a very good process in terms of metal yield and pollutant emission, and the energy consumption is low. No secondary pollution risk exists, and lead emission is almost zero; the existing iron-making blast furnace is utilized for transformation, so that the investment is low and the operation cost is low; no waste is produced.
Ten, the utility model discloses when retrieving lead, still can retrieve low temperature gasifiable metals such as partial zinc, cadmium, also can desorption partly light metal oxide and salt, to improving blast furnace gas permeability, improve material reaction activity, reduce system resistance, improve and smelt intensity significance.
Eleven, can solve the problem that influence the air permeability of the supplies in the high lead ore smelting and high lead waste smelting, therefore this apparatus is suitable for other high lead supplies to smelt too, can regard as a lead smelting apparatus too.
And twelfth, the problem that the furnace burden is blocked by the enriched paste of the light metal oxides in the blast furnace smelting can be solved, so that the equipment and the method are suitable for iron-containing waste treatment of hydrometallurgy.
Drawings
FIG. 1 is a schematic structural view of a blast furnace recycling smelting device for lead-containing materials in embodiment 1 of the present invention: in the figure, 1-blast furnace, 2-powder storage tank, 3-mixer, 4-coal injection distributor, 5-lower annular flue, 6-upper annular flue, 7-top feed inlet, 8-lead discharge outlet, 9-furnace wall blowing feed inlet, 10-furnace wall air guide hole, 11-furnace wall air return hole, 12-furnace gas lead recovery system I, 12.1-lead collector, 12.2-lead collecting tank, 12.3-blow-off valve, 12.4-discharge valve, 13-furnace gas lead recovery system II, 13.1-lead collector, 13.2-lead collecting tank, 13.3-blow-off valve, 13.4-discharge valve, 14-blower I, 15-blower II, 16-nitrogen cleaner, 16.1-nitrogen valve, 16.2-nitrogen valve, 17-smoke inlet valve I, 18-smoke inlet two-way valves I, 19-smoke inlet one-way valves II, 20-smoke inlet two-way valves II, 21-smoke outlet one-way valves I, 22-smoke outlet two-way valves I, 23-smoke outlet one-way valves II, 24-smoke outlet two-way valves II, 25-waste storage battery plate treatment system, 26-waste storage battery waste liquid drying matter crushing system, 27-waste storage battery waste liquid treatment system, and arrows indicate the logistics direction.
FIG. 2 is a cross-sectional view of a lower annular flue of a blast furnace recycling and smelting device for lead-containing materials, which is obtained in example 1 of the present invention: in the figure, 1-blast furnace, 5-lower annular flue and 10-furnace wall air-guiding hole;
FIG. 3 is a sectional view of an upper annular flue of a blast furnace recycling and smelting device for lead-containing materials, which is obtained by the following steps: in the figure, 1-blast furnace, 6-upper ring flue, 11-furnace wall return air hole;
Detailed Description
The present invention will be further described with reference to the following embodiments and accompanying fig. 1-3, but the present invention is not limited to these embodiments.
Example 1
A certain iron and steel enterprise performs storage battery recovery and transformation in a 230 cubic meter blast furnace.
As shown in the figure 1-3, the blast furnace recovery smelting equipment for the lead-containing material comprises a blast furnace 1, a powder storage tank 2, a mixer 3, a coal injection distributor 4, a lower annular flue 5, an upper annular flue 6, a furnace gas lead recovery system I12, a furnace gas lead recovery system II 13, a blower I14, a blower II 15 and a nitrogen sweeper 16;
a feed inlet 7 is formed in the top end of the blast furnace 1, and a lead discharging port 8 is formed in the furnace wall of the bottom end of the blast furnace; a melting section of the blast furnace 1 is provided with a furnace wall blowing feeding hole 9, a transition section 780 ℃ furnace temperature position is provided with 8 furnace wall air guiding holes 10, and a furnace wall air returning hole 11 is arranged 3.5 meters above the furnace wall air guiding holes 10 and at a furnace temperature of 500 ℃;
the powder storage tank 2 is provided with a gas conveying system; the coal injection distributor 4 is connected with a coal injection gun;
the furnace gas lead recovery system I12 consists of a lead collector 12.1 and a lead collecting groove 12.2 arranged at the bottom of the lead collector 12.1, wherein the upper part of the lead collector 12.1 is provided with a diffusion pipe, and the diffusion pipe is provided with a diffusion valve 12.3; the lead collecting tank 12.2 is provided with a lead discharging pipe, and the lead discharging pipe is provided with a discharge valve 12.4;
the furnace gas lead recovery system II 13 consists of a lead collector 13.1 and a lead collecting groove 13.2 arranged at the bottom of the lead collector 13.1, wherein the upper part of the lead collector 13.1 is provided with a diffusion pipe, and the diffusion pipe is provided with a diffusion valve 13.3; the lead collecting tank 13.2 is provided with a lead discharging pipe, and the lead discharging pipe is provided with a discharge valve 13.4;
the feed inlet 7 of the blast furnace 1 is connected with an external waste storage battery polar plate treatment system 25 through a pipeline; a feed port at the top end of the powder storage tank 2 is connected with an external waste storage battery waste liquid dried substance crushing system 26 through a pipeline, and the waste storage battery waste liquid dried substance crushing system 26 is connected with a waste storage battery waste liquid treatment system 27;
a discharge port at the bottom end of the powder storage tank 2 is connected with an inlet of a mixer 3 through a pipeline, an outlet of the mixer 3 is directly connected with a coal injection distributor 4, the coal injection distributor 4 is connected with a coal injection gun through a branch pipe, and the coal injection gun is inserted into a furnace wall injection feed hole 9;
the furnace wall air introducing hole 10 is connected with a lower annular flue 5 through a branch pipe, and the lower annular flue 5 is connected with a flue gas inlet of a furnace gas lead recovery system I12 and a flue gas inlet of a furnace gas lead recovery system II 13 through a three-way pipeline branch; the smoke outlets of the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 are connected with an annular flue 6 in a combining way through a three-way pipeline, and the upper annular flue 6 is connected with a furnace wall air return hole 11 through a branch pipe;
the nitrogen sweeper 16 is respectively connected with the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 through pipelines, and a valve 16.1 is arranged on a connecting pipeline of the nitrogen sweeper 16 and the furnace gas lead recovery system I12; a valve 16.2 is arranged on a connecting pipeline of the nitrogen sweeper 16 and the furnace gas lead recovery system II 13;
the air blower I14 is connected with the furnace gas lead recovery system I12 through a pipeline, and the air blower II 15 is connected with the furnace gas lead recovery system II 13 through a pipeline;
a branch connecting pipeline of the lower annular flue 5 and the furnace gas lead recovery system I12 is provided with a first smoke inlet valve I17 and a second smoke inlet valve I18; a branch connecting pipeline of the annular flue 5 and the furnace gas lead recovery system II 13 is provided with a first smoke inlet valve II 19 and a second smoke inlet valve II 20; a branch connecting pipeline of the furnace gas lead recovery system I12 and the upper annular flue 6 is provided with a first smoke outlet valve I21 and a second smoke outlet valve I22; a branch connecting pipeline of the furnace gas lead recovery system II 13 and the upper annular flue 6 is provided with a first smoke outlet valve II 23 and a second smoke outlet valve II 24;
a valve is arranged on a connecting branch pipe of the lower annular flue 5 and the furnace wall air-introducing hole 10; a valve is arranged on a connecting branch pipe of the upper annular flue 6 and the furnace wall air return hole 11;
valves are arranged on the connecting and combining pipelines of the furnace gas lead recovery system I12 and the furnace gas lead recovery system II 13 and the upper annular flue 6;
the coal injection distributor 4 is provided with 8 branch pipes connected with 8 coal injection guns, and the 8 coal injection guns are respectively inserted into 8 furnace wall injection feeding holes 9;
and motors of the blower I14 and the blower II 15 are variable frequency motors.
A blast furnace recovery smelting method of a lead-containing material adopts the blast furnace recovery smelting device of the lead-containing material, and comprises the following steps:
splitting the waste storage battery, pretreating a polar plate of a large lead plate in a waste storage battery polar plate treatment system 25, and cutting the large lead plate into small blocks convenient for feeding to obtain a pretreated polar plate material; waste liquid in the waste storage battery consists of lead sulfate, sulfuric acid and water, the waste liquid is pretreated in a waste storage battery waste liquid treatment system 27, the waste liquid is mixed with lime powder to prepare mixed solid of calcium sulfate, calcium hydroxide, calcium oxide and lead sulfate, then the mixed solid is crushed in a waste storage battery waste liquid dried matter crushing system 26, and the crushing granularity is less than or equal to 80 meshes to obtain pretreated powder;
adding the pretreated plate material into a blast furnace 1 through a feeding system through a feeding hole 7; adding the pre-treatment powder into a powder storage tank 2 through a pipeline, conveying the pre-treatment powder into a mixer 3 through the pipeline by a gas conveying system of the powder storage tank 2 for mixing, then spraying the pre-treatment powder into a coal injection distributor 4 along with injected fuel, distributing the pre-treatment powder to a coal injection gun through the coal injection distributor 4, and finally spraying the pre-treatment powder into a blast furnace 1 through a furnace wall injection feeding hole 9;
normally smelting iron in a blast furnace 1, wherein smelting furnace materials comprise sintered ore, pellet ore, porous coke and smelting solvent, the temperature of molten iron at the bottom of the blast furnace is 1400-1500 ℃, the temperature of a coal injection tuyere area, namely the temperature of a furnace wall injection feeding hole 9 area is 1800-2300 ℃, the smoke discharge temperature at the furnace top is 150-250 ℃, and the reducing atmosphere is in the furnace;
(1) the metal lead in the pole plate material added through the feed inlet 7 starts to melt at 327 ℃, passes through the furnace burden, flows to the lower part of the furnace and sinks into the furnace bottom; meanwhile, a small amount of lead is vaporized and raised at high temperature in the downward flowing process, lead steam is adsorbed by a plurality of layers of porous coke and sinter in the raising process or is cooled and solidified on the surface of a furnace charge by a low-temperature furnace charge, then the lead steam descends along with the furnace charge, the temperature rises after descending, the lead is vaporized again, finally the lead is balanced in different temperature areas, lead-containing flue gas at a temperature area of 800-650 ℃ in the blast furnace 1 is led out through a furnace wall air-leading hole 10 and enters a lower annular flue 5;
(2) the lead sulfate sprayed into the mixed powder in the blast furnace 1 is rapidly decomposed into sulfur oxide and lead oxide at the temperature of over 1800 ℃, then the lead oxide is changed into gas and is reduced into metallic lead by carbon monoxide and carbon, the metallic lead is vaporized, and the lead vapor is condensed into liquid lead when meeting low-temperature furnace burden after rising, and then flows downwards and sinks into the furnace bottom; the sulfur oxide is reduced into hydrogen sulfide and carbonyl sulfide which are discharged out of the furnace along with furnace gas, and the hydrogen sulfide and the carbonyl sulfide are captured and removed by a coal gas desulfurization link or absorbed by molten iron, so that the molten iron is increased in sulfur; calcium sulfate in the mixed powder enters the slag; calcium hydroxide in the mixed powder is decomposed into water and calcium oxide, and the calcium oxide enters a bottom molten pool along with iron dropping from the soft melting zone and is captured by slag to become a slagging material;
and 4, recovering:
the lead recovery is carried out by adopting a furnace gas lead recovery system I12, firstly, a nitrogen sweeper 16 is communicated with a high-pressure nitrogen source, a nitrogen valve 16.1 is opened, a relief valve 12.3 is opened, nitrogen is injected into the furnace gas lead recovery system I12, and air is replaced by the nitrogen; then, starting an air blower I14; then opening a first smoke outlet valve I21 and a second smoke outlet valve I22, finally gradually opening a first smoke inlet valve I17 and a second smoke inlet valve I18, and controlling the smoke output to be 20-30% by controlling the smoke inlet valves; the introduced flue gas enters a furnace gas lead recovery system I12 through a pipeline, the temperature is reduced and the lead, the zinc, the cadmium, the light metal oxides and the salts are captured, and the cooled lead liquid, the zinc, the cadmium, the light metal oxides and the salts flow into a lead collecting tank 12.2; the unliquefied flue gas in the furnace gas lead recovery system I12 enters the upper annular flue 6 through a pipeline and is led back to the blast furnace 1 through the furnace wall air return hole 11; the pressure of the smoke led out from the furnace wall air-leading hole 10 after being decompressed through the pipeline resistance and the furnace gas lead recovery system resistance is larger than the pressure of the smoke in the furnace at the furnace wall air-returning hole 11.
In the method, the lead collector 12.1 adopts plate type heat exchange.
In the method, the medium for cooling is air-cooled, and the air source is provided by an air blower I14.
The pretreated plate material of the embodiment is uniformly added along with the charging materials of the blast furnace, the coke ratio is adjusted according to the addition amount, and the coke ratio is adjusted by 45 kilograms according to the increase of lead per ton; the coke ratio of the charging material is increased by 150 kilograms of coke per ton of powder, fine adjustment is carried out according to furnace temperature change in the operation process, and the coke ratio is actually increased by 120 kilograms per ton of powder.
After the equipment operates for 4-5 hours, opening a discharge valve of the furnace gas lead recovery system I to discharge lead for the first time, and then periodically discharging lead according to the lead collection speed and the volume of a lead collection tank; the equipment operates for 8 hours to discharge lead from the bottom of the blast furnace for the first time, and then the lead is discharged once or twice every day, which is determined according to the amount of the lead-containing materials input in smelting.
When the furnace gas lead recovery system I operates for two months, the blockage of a lead discharge port occurs once, and the operation of the furnace gas lead recovery system I is stopped and maintained; meanwhile, the furnace gas lead recovery system II is started to recover, so that continuous production is not delayed.
According to the calculation of the input and output for two months, the total lead recovery rate of the lead recovered by the upper lead collector and the lead discharged from the lead discharge port at the bottom of the blast furnace is more than 99 percent. The crude lead collected by the lead removing equipment contains partial zinc and cadmium metals, and the three metals are separated during refining.
In the process of operating the equipment for four months, except the blockage of the lead discharging port of the lead equipment by the primary furnace gas, no problem occurs, the operation is normal, and the influence on the air permeability of the furnace burden caused by the treatment of lead waste materials is avoided. The lead removing system can discharge 5 tons of lead at most every day, the air permeability of the furnace charge is poor when the lead is not discharged, and the air permeability of the furnace charge is improved quickly after the lead is discharged. The blast furnace gas has no lead component and the slag has no lead concentration change;
the amount of the mixed powder is at most 55 tons per day during the operation of the blast furnace, and at most 100 tons of pole plate waste is added from the top of the blast furnace.
Claims (7)
1. A blast furnace recycling smelting device for lead-containing materials is characterized by comprising a blast furnace (1), a powder storage tank (2), a mixer (3), a coal injection distributor (4), a lower annular flue (5), an upper annular flue (6), a furnace gas lead recycling system I (12), a furnace gas lead recycling system II (13), a blower I (14), a blower II (15) and a nitrogen sweeper (16);
a feed inlet (7) is formed in the top end of the blast furnace (1), and a lead discharging port (8) is formed in the furnace wall at the bottom end; a melting section of the blast furnace (1) is provided with a furnace wall blowing feeding hole (9), a furnace wall air guiding hole (10) is arranged at the furnace temperature of 800-650 ℃ of the transition section, and a furnace wall air returning hole (11) is arranged at the furnace temperature of 600-350 ℃ of the transition section;
the powder storage tank (2) is provided with a gas conveying system; the coal injection distributor (4) is connected with a coal injection gun;
the furnace gas lead recovery system I (12) consists of a lead collector (12.1) and a lead collecting groove (12.2) arranged at the bottom of the lead collector (12.1), wherein the upper part of the lead collector (12.1) is provided with a diffusing pipe, and the diffusing pipe is provided with a diffusing valve (12.3); the lead collecting groove (12.2) is provided with a lead discharging pipe, and the lead discharging pipe is provided with a discharging valve (12.4);
the furnace gas lead recovery system II (13) consists of a lead collector (13.1) and a lead collecting groove (13.2) arranged at the bottom of the lead collector (13.1), wherein the upper part of the lead collector (13.1) is provided with a diffusing pipe, and the diffusing pipe is provided with a diffusing valve (13.3); the lead collecting groove (13.2) is provided with a lead discharging pipe, and the lead discharging pipe is provided with a discharging valve (13.4);
the feed inlet (7) of the blast furnace (1) is connected with an external waste storage battery plate treatment system (25) through a pipeline; a feed inlet at the top end of the powder storage tank (2) is connected with an external waste storage battery waste liquid dried substance crushing system (26) through a pipeline, and the waste storage battery waste liquid dried substance crushing system (26) is connected with a waste storage battery waste liquid treatment system (27);
a discharge port at the bottom end of the powder storage tank (2) is connected with an inlet of the mixer (3) through a pipeline, an outlet of the mixer (3) is directly connected with the coal injection distributor (4), the coal injection distributor (4) is connected with a coal injection gun through a branch pipe, and the coal injection gun is inserted into a furnace wall injection feed hole (9); the furnace wall air-introducing hole (10) is connected with a lower annular flue (5) through a branch pipe, and the lower annular flue (5) is connected with a flue gas inlet of a furnace gas lead recovery system I (12) and a flue gas inlet of a furnace gas lead recovery system II (13) through a three-way pipeline branch; the smoke outlets of the furnace gas lead recovery system I (12) and the furnace gas lead recovery system II (13) are connected with the annular flue (6) through a three-way pipeline in a combined mode, and the upper annular flue (6) is connected with the furnace wall air return hole (11) through a branch pipe;
the nitrogen sweeper (16) is respectively connected with the furnace gas lead recovery system I (12) and the furnace gas lead recovery system II (13) through pipelines, and a valve (16.1) is arranged on a connecting pipeline of the nitrogen sweeper (16) and the furnace gas lead recovery system I (12); a valve (16.2) is arranged on a connecting pipeline of the nitrogen sweeper (16) and the furnace gas lead recovery system II (13);
the air blower I (14) is connected with the furnace gas lead recovery system I (12) through a pipeline, and the air blower II (15) is connected with the furnace gas lead recovery system II (13) through a pipeline;
a branch connecting pipeline of the lower annular flue (5) and the furnace gas lead recovery system I (12) is provided with a first smoke inlet valve I (17) and a second smoke inlet valve I (18); a branch connecting pipeline of the annular flue (5) and the furnace gas lead recovery system II (13) is provided with a first smoke inlet valve II (19) and a second smoke inlet valve II (20); a branch connecting pipeline of the furnace gas lead recovery system I (12) and the upper annular flue (6) is provided with a first smoke outlet valve I (21) and a second smoke outlet valve I (22); and a branch connecting pipeline of the furnace gas lead recovery system II (13) and the upper annular flue (6) is provided with a first smoke outlet valve II (23) and a second smoke outlet valve II (24).
2. The blast furnace recovery smelting equipment for lead-containing materials according to claim 1, wherein a valve is arranged on a connecting branch pipe of the lower annular flue (5) and the furnace wall air-introducing hole (10); and a valve is arranged on a connecting branch pipe of the upper annular flue (6) and the furnace wall air return hole (11).
3. The blast furnace recovery smelting equipment for lead-containing materials according to claim 1, wherein valves are arranged on the connecting and combining pipelines of the furnace gas lead recovery system I (12) and the furnace gas lead recovery system II (13) and the upper annular flue (6).
4. The blast furnace recovery smelting equipment for lead-containing materials according to claim 1, wherein the number of the furnace wall blowing feeding holes (9) is N, and N is more than or equal to 2; the number of the coal injection guns is the same as that of the furnace wall injection feeding holes (9); the coal injection gun is a heat-resistant stainless steel pipe.
5. The blast furnace recovery smelting equipment for lead-containing materials according to claim 1, wherein the number of the furnace wall gas guiding holes (10) is M, and M is more than or equal to 2; the inner side of the lower annular flue (5) is provided with holes with the same number as the furnace wall air-guiding holes (10).
6. The blast furnace recovery smelting equipment for lead-containing materials according to claim 1, wherein the number of the furnace wall return air holes (11) is M, and M is more than or equal to 2; the inner side of the upper annular flue (6) is provided with holes with the same number as the furnace wall air return holes (11).
7. The blast furnace recycling smelting equipment for lead-containing materials according to claim 1, wherein motors of the blower I (14) and the blower II (15) are variable frequency motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021996373.6U CN212713694U (en) | 2020-09-14 | 2020-09-14 | Blast furnace recycling smelting equipment for lead-containing materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021996373.6U CN212713694U (en) | 2020-09-14 | 2020-09-14 | Blast furnace recycling smelting equipment for lead-containing materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212713694U true CN212713694U (en) | 2021-03-16 |
Family
ID=74941830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021996373.6U Active CN212713694U (en) | 2020-09-14 | 2020-09-14 | Blast furnace recycling smelting equipment for lead-containing materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212713694U (en) |
-
2020
- 2020-09-14 CN CN202021996373.6U patent/CN212713694U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111910083A (en) | Blast furnace recycling smelting equipment and method for lead-containing material | |
| CN110438277B (en) | Cyclone flash reduction direct steelmaking system and process | |
| CN112593093B (en) | Nickel smelting device and nickel smelting method | |
| CN101575654B (en) | Process and device for preparing iron alloy containing nickel and nickel-chromium | |
| WO2021042699A1 (en) | Double-melt bath organic solid waste blowing gasification device | |
| CN103114206A (en) | Method and device for recovering valuable elements from lead-silver-bismuth slag in copper smelting | |
| CN102277463B (en) | Reduction furnace and device for producing direct reduced iron | |
| CN101296858B (en) | A method for producing hydrogen and/or other gases from steel plant wastes and waste heat | |
| CN115449579A (en) | Low-carbon smelting reduction iron-making method and device | |
| CN214694260U (en) | Direct smelting process device for iron-containing zinc-containing solid waste in iron and steel plant | |
| CN102268502A (en) | Spongy iron preparation method by smelting refractory iron ore (slag) with reduction rotary kiln | |
| CN212335216U (en) | Fly ash processing system is smelted to blast furnace | |
| CN207016812U (en) | Coal, gas integral flash iron-smelting furnace | |
| CN212713694U (en) | Blast furnace recycling smelting equipment for lead-containing materials | |
| CN216141595U (en) | Side type powder feeding top-blown furnace system | |
| CN101565767A (en) | Method for melting reduction iron making | |
| CN114216124A (en) | Waste circuit board recycling system and process | |
| CN1302122C (en) | Reduction smelting method in a shaft furnace with recovery of volatile secondary metals | |
| KR101863983B1 (en) | Method and apparatus for making liquid iron and steel | |
| CN204342823U (en) | A kind of smelting equipment with waste heat recycling system | |
| CN109628676A (en) | A kind of abbreviated system directly producing pure molten iron | |
| CN205528962U (en) | Handle lead -zinc srnelter slag's rotary hearth furnace | |
| CN115449573B (en) | Energy-saving environment-friendly blast furnace and blast furnace ironmaking process | |
| CN214612705U (en) | Nickel smelting device | |
| CN111850195B (en) | Method for treating zinc-containing solid waste of steel plant by environment-friendly improved blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |