CN104928473A - Method for reducing concentration of carbon monoxide in tail gas of Ausmelt furnace - Google Patents
Method for reducing concentration of carbon monoxide in tail gas of Ausmelt furnace Download PDFInfo
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- CN104928473A CN104928473A CN201510396835.8A CN201510396835A CN104928473A CN 104928473 A CN104928473 A CN 104928473A CN 201510396835 A CN201510396835 A CN 201510396835A CN 104928473 A CN104928473 A CN 104928473A
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- carbon monoxide
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- spray gun
- ausmelt furnace
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Abstract
The invention discloses a method for reducing the concentration of carbon monoxide in tail gas of an Ausmelt furnace and belongs to the technical field of non-ferrous metal metallurgy. The spray gun oxygen-enriched top-blown submerged smelting technology is adopted. The method comprises the steps of measuring the concentration of carbon monoxide in tail gas of the Ausmelt furnace, and reducing the coal consumption of a spray gun when the measured value of the concentration of carbon monoxide is overhigh; keeping the Ausmelt furnace in the production state constantly, keeping molten bath level at 1500-1900 mm, increasing powdered coal consumption by 50 g each time the molten bath level increases by 100 mm, and keeping molten bath temperature at 1280-1360 DEG C; measuring the oxygen concentration of the spray gun, and reducing the oxygen concentration of the spray gun by 3% of the measured value; keeping the number of revolution of an exhaust fan of the Ausmelt furnace at 1200 rpm. By the adoption of the method, generation of carbon monoxide in tail gas is reduced step by step at source and during production at the same time, the safety of the Ausmelt furnace during production is improved greatly, and potential safety hazards are reduced.
Description
Technical field
The invention belongs to non-ferrous metallurgy technology field, particularly relate to a kind of method that Ausmelt furnace oxygen-enriched top blowing smelting furnace reduces carbon monoxide concentration.
Background technology
Ausmelt furnace feeds intake production period, and because many-sided reason makes tail gas carbon monoxide content often exceed standard, system cannot run well to cause that electricity gathers dust etc., there is larger potential safety hazard.This process is very large to Australia's stove Influence of production, sums up what time below:
1., when Ausmelt furnace tail gas carbon monoxide exceeds standard, electricity gathers dust and there is explosion hazard, jeopardizes production safety.
2., when Ausmelt furnace tail gas carbon monoxide exceeds standard, qualified flue gas acid preparing can not be provided for vitriol works.
3. when Ausmelt furnace tail gas carbon monoxide exceeds standard, if there is leakage, larger on surrounding enviroment impact.
Therefore, need badly in the middle of prior art and a kind of novel technical scheme will solve this problem.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of Ausmelt furnace to reduce the method for carbon monoxide concentration in tail gas, gradually reduce the generation of carbon monoxide in tail gas in source and production process simultaneously, greatly improve the security of Ausmelt furnace production period, reduce the risk that there is potential safety hazard.
Ausmelt furnace reduces a method for carbon monoxide concentration in tail gas, it is characterized in that: comprise the following steps,
The concentration of carbon monoxide in step one, measurement Ausmelt furnace tail gas, carbon monoxide concentration observed value is higher than after 3000ppm, reduce spray gun Coal-fired capacity 100kg, and each all minimizings spray gun Coal-fired capacity 100kg, to tail gas, carbon monoxide concentration is lower than 3000ppm, or spray gun Coal-fired capacity is lower than 3000kg/h;
Step 2, maintenance Ausmelt furnace continue to be in production status, and face, molten bath is 1500mm ~ 1900mm, and face, molten bath height often raises 100mm, and coal amount increases 50kg, and improving bath temperature is 1280 DEG C ~ 1360 DEG C;
Step 3, measurement spray gun oxygen concentration, reduce 3% of observed value, increase spray gun air capacity to 12000Nm by spray gun oxygen concentration
3/ h ~ 13000Nm
3/ h, spray gun amount of oxygen is 5000Nm
3/ h ~ 6000Nm
3/ h;
Step 4, the exhaust blower revolution of Ausmelt furnace is improved 50rpm, and all improve 50rpm, be 1200rpm to exhaust blower revolution at every turn, and the exhaust blower revolution of maintenance Ausmelt furnace is 1200rpm;
Step 5, after described step one to step 4 operation, measure the concentration of carbon monoxide in Ausmelt furnace tail gas, concentration, higher than 3000ppm, keeps rifle head submergence pool depth to be 50mm ~ 100mm; Concentration, lower than 3000ppm, keeps Ausmelt furnace to continue this state of operation.
Adopt spray gun oxygen-enriched top blowing submergence melting technology.
The weight entering nickel in stove concentrate of Ausmelt furnace is 4% ~ 14% of concentrate weight, and the weight of copper is 0.5% ~ 5% of concentrate weight, and the weight of sulphur is 10% ~ 24% of concentrate weight.
In spray gun fire coal, the weight of fixed carbon is 38% ~ 45% of coal-fired weight, and the weight of fugitive constituent is 28% ~ 38% of coal-fired weight.
By above-mentioned design, the present invention can bring following beneficial effect: a kind of Ausmelt furnace reduces the method for carbon monoxide concentration in tail gas, gradually reduce the generation of carbon monoxide in tail gas in source and production process simultaneously, greatly improve the security of Ausmelt furnace production period, reduce the risk that there is potential safety hazard.The control of spray gun air quantity in step 3, can play the object of carbon monoxide in dilution tail gas; To the control of exhaust blower revolution in step 4, flue gas can be made to discharge along flue faster, and reduce fire door leap up fire phenomenon thus reduce the generation of carbon monoxide.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated:
Fig. 1 is the operating process schematic diagram that a kind of Ausmelt furnace of the present invention reduces the method for carbon monoxide concentration in tail gas.
Embodiment
Embodiment one,
Ausmelt furnace reduces a method for carbon monoxide concentration in tail gas, as shown in Figure 1, comprises the following steps,
The concentration of carbon monoxide in step one, measurement Ausmelt furnace tail gas, carbon monoxide concentration observed value is higher than after 3000ppm, reduce spray gun Coal-fired capacity 100kg, and per minute all reduces spray gun Coal-fired capacity 100kg, to tail gas, carbon monoxide concentration is lower than 3000ppm, or spray gun Coal-fired capacity is lower than 3000kg/h;
Step 2, maintenance Ausmelt furnace continue to be in production status, and face, molten bath is 1600mm, and face, molten bath height often raises 100mm, and coal amount increases 50kg, improve bath temperature and ensure Australia's slag smooth discharge, and bath temperature is 1300 DEG C;
Step 3, measurement spray gun oxygen concentration, reduce 3% of observed value, increase spray gun air capacity to 12000Nm by spray gun oxygen concentration
3/ h, spray gun amount of oxygen is 5000Nm
3/ h;
Step 4, the exhaust blower revolution of Ausmelt furnace is improved 50rpm, and per minute all improves 50rpm, is 1200rpm to exhaust blower revolution, and the exhaust blower revolution keeping Ausmelt furnace is 1200rpm;
Step 5, after described step one to step 4 operation, measure the concentration of carbon monoxide in Ausmelt furnace tail gas, concentration, higher than 3000ppm, keeps rifle head submergence pool depth to be 80mm; Concentration, lower than 3000ppm, keeps Ausmelt furnace to continue this state of operation.
Embodiment two,
Ausmelt furnace reduces a method for carbon monoxide concentration in tail gas,
The concentration of carbon monoxide in step one, measurement Ausmelt furnace tail gas, carbon monoxide concentration observed value is higher than after 3000ppm, reduce spray gun Coal-fired capacity 100kg, and per minute all reduces spray gun Coal-fired capacity 100kg, to tail gas, carbon monoxide concentration is lower than 3000ppm, or spray gun Coal-fired capacity is lower than 3000kg/h;
Step 2, maintenance Ausmelt furnace continue to be in production status, and face, molten bath is 1800mm, and face, molten bath height often raises 100mm, and coal amount increases 50kg, improve bath temperature and ensure Australia's slag smooth discharge, and bath temperature rises to 1320 DEG C;
Step 3, measurement spray gun oxygen concentration, reduce 3% of observed value, increase spray gun air capacity to 13000Nm by spray gun oxygen concentration
3/ h, spray gun amount of oxygen is 5000Nm
3/ h;
Step 4, the exhaust blower revolution of Ausmelt furnace is improved 50rpm, and per minute all improves 50rpm, is 1200rpm to exhaust blower revolution, and the exhaust blower revolution keeping Ausmelt furnace is 1200rpm;
Step 5, after described step one to step 4 operation, measure the concentration of carbon monoxide in Ausmelt furnace tail gas, concentration, higher than 3000ppm, keeps rifle head submergence pool depth to be 60mm; Concentration, lower than 3000ppm, keeps Ausmelt furnace to continue this state of operation.
The method that a kind of Ausmelt furnace of the present invention reduces carbon monoxide concentration in tail gas adopts spray gun oxygen-enriched top blowing submergence melting technology.
The weight entering nickel in stove concentrate that a kind of Ausmelt furnace of the present invention reduces the method Ausmelt furnace of carbon monoxide concentration in tail gas is 4% ~ 14% of concentrate weight, the weight of copper is 0.5% ~ 5% of concentrate weight, and the weight of sulphur is 10% ~ 24% of concentrate weight.
The weight that a kind of Ausmelt furnace of the present invention reduces fixed carbon in the method spray gun fire coal of carbon monoxide concentration in tail gas is 38% ~ 45% of coal-fired weight, and the weight of fugitive constituent is 28% ~ 38% of coal-fired weight.
In a kind of Ausmelt furnace reduction of the present invention tail gas, the operation of the method steps one of carbon monoxide concentration can reduce the generation of carbon monoxide from source, due in Ausmelt furnace generative process, operator will according to face, molten bath height, emission behaviour controls bath temperature, spray gun Coal-fired capacity is added and subtracted particularly important with regard to what show in this process, when face, molten bath is low and emission behaviour is better, can suitably reduce spray gun Coal-fired capacity.
Claims (4)
1. Ausmelt furnace reduces a method for carbon monoxide concentration in tail gas, it is characterized in that: comprise the following steps,
The concentration of carbon monoxide in step one, measurement Ausmelt furnace tail gas, carbon monoxide concentration observed value is higher than after 3000ppm, reduce spray gun Coal-fired capacity 100kg, and each all minimizings spray gun Coal-fired capacity 100kg, to tail gas, carbon monoxide concentration is lower than 3000ppm, or spray gun Coal-fired capacity is lower than 3000kg/h;
Step 2, maintenance Ausmelt furnace continue to be in production status, and face, molten bath is 1500mm ~ 1900mm, and face, molten bath height often raises 100mm, and coal amount increases 50kg, and improving bath temperature is 1280 DEG C ~ 1360 DEG C;
Step 3, measurement spray gun oxygen concentration, reduce 3% of observed value, increase spray gun air capacity to 12000Nm by spray gun oxygen concentration
3/ h ~ 13000Nm
3/ h, spray gun amount of oxygen is 5000Nm
3/ h ~ 6000Nm
3/ h;
Step 4, the exhaust blower revolution of Ausmelt furnace is improved 50rpm, and all improve 50rpm, be 1200rpm to exhaust blower revolution at every turn, and the exhaust blower revolution of maintenance Ausmelt furnace is 1200rpm;
Step 5, after described step one to step 4 operation, measure the concentration of carbon monoxide in Ausmelt furnace tail gas, concentration, higher than 3000ppm, keeps rifle head submergence pool depth to be 50mm ~ 100mm; Concentration, lower than 3000ppm, keeps Ausmelt furnace to continue this state of operation.
2. a kind of Ausmelt furnace according to claim 1 reduces the method for carbon monoxide concentration in tail gas, it is characterized in that: adopt spray gun oxygen-enriched top blowing submergence melting technology.
3. a kind of Ausmelt furnace according to claim 1 reduces the method for carbon monoxide concentration in tail gas, it is characterized in that: the weight entering nickel in stove concentrate of Ausmelt furnace is 4% ~ 14% of concentrate weight, the weight of copper is 0.5% ~ 5% of concentrate weight, and the weight of sulphur is 10% ~ 24% of concentrate weight.
4. a kind of Ausmelt furnace according to claim 1 reduces the method for carbon monoxide concentration in tail gas, and it is characterized in that: in spray gun fire coal, the weight of fixed carbon is 38% ~ 45% of coal-fired weight, the weight of fugitive constituent is 28% ~ 38% of coal-fired weight.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4985068A (en) * | 1989-11-27 | 1991-01-15 | Midrex International Bv, Rotterdam, Zurich Branch | Method and apparatus for smelting iron oxide |
| CN102268557A (en) * | 2011-08-02 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | One-step oxidizing smelting, retailoring and slag fuming volatilization method for lead sulphide concentrate |
| KR101242696B1 (en) * | 2010-12-28 | 2013-03-12 | 주식회사 포스코 | Burning control method of combustion chamber |
| CN103388042A (en) * | 2013-07-23 | 2013-11-13 | 山东莱钢永锋钢铁有限公司 | Carbon monoxide lance position operation method for converter blowing |
-
2015
- 2015-07-08 CN CN201510396835.8A patent/CN104928473B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4985068A (en) * | 1989-11-27 | 1991-01-15 | Midrex International Bv, Rotterdam, Zurich Branch | Method and apparatus for smelting iron oxide |
| KR101242696B1 (en) * | 2010-12-28 | 2013-03-12 | 주식회사 포스코 | Burning control method of combustion chamber |
| CN102268557A (en) * | 2011-08-02 | 2011-12-07 | 云南锡业集团（控股）有限责任公司 | One-step oxidizing smelting, retailoring and slag fuming volatilization method for lead sulphide concentrate |
| CN103388042A (en) * | 2013-07-23 | 2013-11-13 | 山东莱钢永锋钢铁有限公司 | Carbon monoxide lance position operation method for converter blowing |
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