CN204080058U - The mixed gas of Sweet natural gas and nitrogen is adopted to reduce the device of oxygen-bearing copper liquid - Google Patents
The mixed gas of Sweet natural gas and nitrogen is adopted to reduce the device of oxygen-bearing copper liquid Download PDFInfo
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- CN204080058U CN204080058U CN201420472531.6U CN201420472531U CN204080058U CN 204080058 U CN204080058 U CN 204080058U CN 201420472531 U CN201420472531 U CN 201420472531U CN 204080058 U CN204080058 U CN 204080058U
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Abstract
The utility model provides a kind of mixed gas of Sweet natural gas and nitrogen that adopts to reduce the device of oxygen-bearing copper liquid, and comprising: natural gas supply device (1), it is connected with mixing tank (5) by natural gas flow control valve group (3); Nitrogen supply (NS) device (2), it is connected with mixing tank (5) by nitrogen flow control valve group (4); Mixing tank (5), it is connected with reduction jet pipe (6); Smelting furnace (8), for splendid attire oxygen-bearing copper liquid to be restored; PLC control module (11), its one end is connected with natural gas flow control valve group (3) and nitrogen flow control valve group (4), the other end is connected with the Monitoring equipment being placed in smelting furnace (8), for controlling the blending ratio of described Sweet natural gas and nitrogen.
Description
Technical field
The application belongs to copper weld pool field, reduces the device of oxygen-bearing copper liquid in particular to a kind of mixed gas of Sweet natural gas and nitrogen that adopts.
Background technology
Reclaimed copper fusion process comprises fusing, is oxidized, skims and reduction phase.For improving the purity of copper, carry out removing impurities by oxidation with being blown into pressurized air, then reduce deoxidation with reductive agent.In conventional regeneration copper weld pool reduction process, people usually adopt poling.But because timber resources is valuable, be protection of the environment, reduction process gradually adopts substitute gas poling.
At present, use Sweet natural gas to carry out reduction and there is following drawback: the utilization ratio of (1) Sweet natural gas is low, and the recovery time is long; (2) Sweet natural gas and copper liquid react not exclusively, produce a large amount of black smoke and cause environmental pollution; (3) the Sweet natural gas hydrogen that cracking produces in copper liquid is easily absorbed by copper liquid, makes copper occur some micropores, affects quality product; (4) due in reduction process gas discharge do not make appropriate and adjustment in time, cause some time period Sweet natural gas of reduction process excessive, make copper liquid temperature too high.The more high easier oxygen intake of copper liquid temperature is oxidized again.Require index for making the oxygen level of copper liquid be reduced to, corresponding reduction process will be elongated.
Utility model content
For solving the drawback in above-mentioned copper weld pool technique, the utility model adopts the mixed gas of Sweet natural gas and nitrogen to reduce oxygen-bearing copper liquid, and according to the blending ratio of the parameter regulation Sweet natural gas of monitoring and nitrogen.
Particularly, first, Sweet natural gas and nitrogen are carried out premix in a mixing tank.The gas discharge and the nitrogen flow that enter mixing tank are come accurately to control by natural gas flow control valve group and nitrogen flow control valve group respectively.
Therefore, the utility model provides a kind of mixed gas of Sweet natural gas and nitrogen that adopts to reduce the device of oxygen-bearing copper liquid, it is characterized in that, comprising:
Natural gas supply device (1), it is connected with mixing tank (5), for providing Sweet natural gas to mixing tank (5) by natural gas flow control valve group (3);
Nitrogen supply (NS) device (2), it is connected with mixing tank (5), for providing nitrogen to mixing tank (5) by nitrogen flow control valve group (4);
Mixing tank (5), it is connected, for providing the mixed gas of Sweet natural gas and nitrogen to copper liquid (7) with reduction jet pipe (6);
Smelting furnace (8), for splendid attire oxygen-bearing copper liquid to be restored;
PLC control module (11), its one end is connected with natural gas flow control valve group (3) and nitrogen flow control valve group (4), the other end is connected with the Monitoring equipment being placed in smelting furnace (8), for controlling the blending ratio of described Sweet natural gas and nitrogen.
According to one preferred embodiment, the Monitoring equipment (14) that the oxygen level of the copper liquid (7) that the Monitoring equipment being placed in smelting furnace (8) described in is selected from the Monitoring equipment (13) of the Monitoring equipment (10) of flue outlet (9) place's smoke temperature change of described smelting furnace (8) and the change of CO concentration in flue gas or the furnace temperature change of described smelting furnace (8) and furnace gas CO change in concentration or described smelting furnace (8) changes.
According to one preferred embodiment, the utility model adopts the mixed gas of Sweet natural gas and nitrogen reduce the device of oxygen-bearing copper liquid to comprise one or many and reduce jet pipe, and described reduction jet pipe passes through in charging opening (12) insertion smelting furnace (8).
According to another preferred embodiment, the utility model adopts the mixed gas of Sweet natural gas and nitrogen to reduce the device of oxygen-bearing copper liquid to comprise reduction jet pipe, described reduction jet pipe (6) is inserted in smelting furnace (8) by smelting furnace furnace roof (15), and the length direction namely along smelting furnace (8) is especially evenly distributed on furnace roof (15).
According to one preferred embodiment, the side of described smelting furnace (8) is provided with burns rifle (16), and for melting and oxidation stage, and copper liquid heats up again.
The mixed gas of employing Sweet natural gas provided by the utility model and nitrogen reduce the method and apparatus of oxygen-bearing copper liquid can effectively improve Sweet natural gas utilization ratio about 30%, improve copper liquid quality and shorten the recovery time and be about 20-40%.
Accompanying drawing explanation
Fig. 1 adopts the mixed gas of device Sweet natural gas of the present invention and nitrogen to reduce a kind of schematic diagram of embodiment of oxygen-bearing copper liquid.
Fig. 2 adopts the mixed gas of device Sweet natural gas of the present invention and nitrogen to reduce a kind of schematic diagram of embodiment of oxygen-bearing copper liquid.
Fig. 3 adopts the mixed gas of device Sweet natural gas of the present invention and nitrogen to reduce a kind of schematic diagram of embodiment of oxygen-bearing copper liquid.
Fig. 4 adopts the mixed gas of device Sweet natural gas of the present invention and nitrogen to reduce a kind of schematic diagram of embodiment of oxygen-bearing copper liquid.
Fig. 5 adopts the mixed gas of device Sweet natural gas of the present invention and nitrogen to reduce a kind of schematic diagram of embodiment of oxygen-bearing copper liquid.
Fig. 6 adopts the mixed gas of device Sweet natural gas of the present invention and nitrogen to reduce a kind of schematic diagram of embodiment of oxygen-bearing copper liquid.
Embodiment
Adopt the mixed gas of Sweet natural gas and nitrogen to reduce the method for oxygen-bearing copper liquid with device of the present utility model to comprise the following steps: reduce passing in oxygen-bearing copper liquid after described Sweet natural gas and nitrogen pre-mixing, the blending ratio of wherein said Sweet natural gas and nitrogen is regulated by the parameter of monitoring again.
According to one preferred embodiment, described in aforesaid method, parameter is selected from:
(1) change of CO concentration in the furnace temperature change of the smelting furnace of oxygen-bearing copper liquid described in splendid attire and furnace gas; Or
(2) the flue outlet place smoke temperature change of the smelting furnace of oxygen-bearing copper liquid described in splendid attire and the change of CO concentration in flue gas; Or
(3) change of oxygen level in described oxygen-bearing copper liquid.
Then by the mixed gas delivery of Sweet natural gas and nitrogen to reduction jet pipe.Finally reduction jet pipe is imbedded in copper liquid and reduce.Reduction jet pipe inserts in smelting furnace by charging opening, also can be arranged on smelting furnace top, and the jet pipe that will reduce during reduction inserts in copper liquid.When not needing, reduction jet pipe shifts out smelting furnace.
The utility model is mixed into nitrogen and inserts in copper liquid again in Sweet natural gas.The existence of nitrogen, enhances the stirring intensity to copper liquid, adds the touch opportunity of Red copper oxide in Sweet natural gas and copper liquid, improves the dynamic performance of Sweet natural gas, thus improves the utilization ratio of Sweet natural gas, alleviates environmental pollution.The existence of nitrogen decreases the solubleness of hydrogen at copper liquid, but also copper liquid surface can be stoped to contact with air, prevents again the phenomenon of dissolved oxygen to occur.So not only can improve copper liquid quality, also can shorten the recovery time.
According to one preferred embodiment, the blending ratio of wherein said Sweet natural gas and nitrogen is greater than at the reduction initial stage and reduces the later stage.At the reduction initial stage, because in copper liquid, the content of Red copper oxide is relatively high, at this moment need to send into more Sweet natural gas and reduce.Along with the carrying out of reduction, in copper liquid, the content of Red copper oxide reduces gradually, at this moment needs to reduce amount of natural gas, and increases nitrogen amount.The ratio of Sweet natural gas and nitrogen, when the initial stage of reduction, can be all Sweet natural gas, then progressively increase the content of nitrogen, makes the ratio of the two be 30: 1,15: 1,10: 1,5: 1,3: 1,2: 1,1: 1.Then along with reduction process progressively reduces, the content of Sweet natural gas reduces gradually, reaches 1: 2, and 1: 3,1: 5,1: 10,1: 15 or 1: 30 until can be all nitrogen.According to the above-mentioned parameter monitored, can every 1,2,3,4,5,10,15,20, or the flow proportional of 30 minutes adjustment Sweet natural gases and nitrogen.In reduction process, effectively control the blending ratio of Sweet natural gas and nitrogen, can further improve the utilization ratio of Sweet natural gas, reduce black smoke and generate, reduce the dissolving of hydrogen in copper liquid and avoid copper liquid temperature too high.
The utility model controls the blending ratio of Sweet natural gas and nitrogen in reduction process in the following way:
(1) mode one: the change of CO concentration in the furnace temperature change of monitoring smelting furnace and furnace gas
Judge that whether the input of Sweet natural gas is too much by the change (dCO/dt) monitoring CO concentration in fire box temperature change (dT/dt) and furnace gas.Temperature variation calculates temperature change value dT/dt by the thermoelectricity temperature value that occasionally infrared measurement of temperature equitemperature survey sensor is measured.The changing value dCO/dt of CO is that the CO densitometer measured by CO survey sensor is calculated.Temperature and CO survey sensor are placed in burner hearth.When the temperature change value dT/dt monitored and CO change in concentration value dCO/dt is higher than set(ting)value given in advance, this just shows that the input of Sweet natural gas is too much, and the ratio of mixture of Sweet natural gas and nitrogen will reduce.The variable signal of furnace temperature and CO can feed back to natural gas flow control valve group and nitrogen flow control valve group, is changed the Sweet natural gas and the nitrogen flow that enter into mixing tank, thus reach required Sweet natural gas and the ratio of mixture of nitrogen by flowrate control valve group.
(2) mode two: the change of smelting furnace smoke outlet place's smoke temperature change and CO concentration in flue gas
Identical with mode one, judge that whether the input of Sweet natural gas is too much by the change (dCO/dt) of the smoke temperature change (dT/dt) that monitors and CO concentration in flue gas.Temperature and the CO concentration that temperature and CO survey sensor are placed on that smelting furnace smoke outlet place monitors flue gas with the difference of mode one.When the temperature change value dT/dt monitored and CO change in concentration value dCO/dt is higher than set(ting)value given in advance, this just shows that the input of Sweet natural gas is too much, and the ratio of mixture of Sweet natural gas and nitrogen will reduce.The variable signal of flue-gas temperature and CO can feed back to natural gas flow control valve group and nitrogen flow control valve group, is changed the Sweet natural gas and the nitrogen flow that enter into mixing tank, thus reach required Sweet natural gas and the ratio of mixture of nitrogen by flowrate control valve group.
(3) mode three: the change of oxygen amount in copper liquid
The oxygen level of copper liquid is by mass spectrograph or other oxygen determination content apparatus measures.When the copper liquid oxygen level of monitoring exceeds the highest set(ting)value given in advance, flowrate control valve group controls Sweet natural gas and nitrogen flow makes Sweet natural gas and nitrogen enter reduction jet pipe with higher ratio of mixture.When the copper liquid oxygen level of monitoring is lower than minimum set(ting)value given in advance, flowrate control valve group adjustment Sweet natural gas and nitrogen flow make the ratio of mixture of Sweet natural gas and nitrogen reduce until the oxygen level of copper liquid is reduced to require index.
According to the utility model particularly preferred embodiment, the blending ratio of described Sweet natural gas and nitrogen is 10: 1 at the reduction initial stage, and the reduction later stage is 1: 10.Gas discharge can be reduced to the 30 ~ 50Nm3/hr in reduction later stage by the 300 ~ 500Nm3/hr at reduction initial stage, nitrogen flow can be increased to the 300 ~ 500Nm3/hr in reduction later stage by the 30 ~ 50Nm3/hr at reduction initial stage.
Further illustrate the utility model below by way of embodiment, but described embodiment should not be considered as the restriction to the utility model scope by any way.
As shown in Figure 1, Sweet natural gas (1), nitrogen (2) enter mixing tank (5) respectively through natural gas flow control valve group (3) and nitrogen flow control valve group (4).In flue outlet (9) laying temperature and the CO Monitoring equipment (10) of smelting furnace (8), the change of monitoring flue-gas temperature and flue gas CO.The signal feedback of flue-gas temperature and flue gas CO calculates temperature change value and CO change in concentration value to PLC control module (11).When the temperature change value calculated and CO change in concentration value higher than set(ting)value given in advance, natural gas flow control valve group (3) and nitrogen flow control valve group (4) just start Sweet natural gas and the nitrogen flow that adjustment enters mixing tank (5), and the blending ratio of Sweet natural gas and nitrogen is reduced.Mixed Sweet natural gas and nitrogen are connected to reduction jet pipe (6), be inserted in copper liquid (7) reduce by the charging opening (12) on smelting furnace (8).
As shown in Figure 2, Sweet natural gas (1), nitrogen (2) enter mixing tank (5) respectively through natural gas flow control valve group (3) and nitrogen flow control valve group (4).(8) laying temperature and CO Monitoring equipment (13) in smelting furnace, monitor the change of CO in fire box temperature and furnace gas.The signal feedback of fire box temperature and furnace gas CO calculates temperature change value and CO change in concentration value to PLC control module (11).When the temperature change value calculated and CO change in concentration value higher than set(ting)value given in advance, natural gas flow control valve group (3) and nitrogen flow control valve group (4) just start Sweet natural gas and the nitrogen flow that adjustment enters mixing tank (5), and the blending ratio of Sweet natural gas and nitrogen is reduced.Mixed Sweet natural gas and nitrogen are connected to reduction jet pipe (6), be inserted in copper liquid (7) reduce by the charging opening (12) on smelting furnace (8).
As shown in Figure 3, Sweet natural gas (1), nitrogen (2) enter mixing tank (5) respectively through natural gas flow control valve group (3) and nitrogen flow control valve group (4).The oxygen level of the copper liquid (7) in smelting furnace (8) is measured with instrument (14), and the oxygen content signal measured feeds back to PLC control module (11).When the copper liquid oxygen level of monitoring exceeds the highest set(ting)value given in advance in PLC control module (11), control Sweet natural gas and nitrogen flow make Sweet natural gas and nitrogen enter after mixing tank (5) mixing with higher ratio of mixture and reduce jet pipe (6) by natural gas flow control valve group (3) and nitrogen flow control valve group (4).When the oxygen level of the copper liquid (7) of monitoring is lower than minimum set(ting)value given in advance, adjustment Sweet natural gas and nitrogen flow make the ratio of mixture of Sweet natural gas and nitrogen reduce until the oxygen level of copper liquid is reduced to require index by flowrate control valve group (3) and (4).Mixed Sweet natural gas and nitrogen are connected to reduction jet pipe (6), be inserted in copper liquid (7) reduce by the charging opening (12) on smelting furnace (8).
As shown in Figure 4, Sweet natural gas (1), nitrogen (2) enter mixing tank (5) respectively through natural gas flow control valve group (3) and nitrogen flow control valve group (4).In flue outlet (9) laying temperature and the CO Monitoring equipment (10) of smelting furnace (8), the change of monitoring flue-gas temperature and flue gas CO.The signal feedback of flue-gas temperature and flue gas CO calculates temperature change value and CO change in concentration value to PLC control module (11).When the temperature change value calculated and CO change in concentration value higher than set(ting)value given in advance, natural gas flow control valve group (3) and nitrogen flow control valve group (4) just start Sweet natural gas and the nitrogen flow that adjustment enters mixing tank (5), and the blending ratio of Sweet natural gas and nitrogen is reduced.Mixed Sweet natural gas and nitrogen are connected to reduction jet pipe (6).Reduction jet pipe (6) is evenly distributed on furnace roof (15) along the length direction of smelting furnace (8).Reduction phase, reduction jet pipe (6) is inserted in copper liquid (7) reduces.This furnace roof inserted mode can make charging opening close completely in reduction process, so not only can reduce heat waste, and can reduce air and enter burner hearth and be again oxidized copper liquid.After reduction terminates, reduction jet pipe (6) can extract smelting furnace (8) out.The side of smelting furnace (8) is provided with burns rifle (16) for melting, oxidation, and the temperature rise period use again of copper liquid.
As shown in Figure 5, Sweet natural gas (1), nitrogen (2) enter mixing tank (5) respectively through natural gas flow control valve group (3) and nitrogen flow control valve group (4).(8) laying temperature and CO Monitoring equipment (13) in smelting furnace, monitor the change of CO in fire box temperature and furnace gas.The signal feedback of fire box temperature and furnace gas CO calculates temperature change value and CO change in concentration value to PLC control module (11).When the temperature change value calculated and CO change in concentration value higher than set(ting)value given in advance, natural gas flow control valve group (3) and nitrogen flow control valve group (4) just start Sweet natural gas and the nitrogen flow that adjustment enters mixing tank (5), and the blending ratio of Sweet natural gas and nitrogen is reduced.Mixed Sweet natural gas and nitrogen are connected to reduction jet pipe (6).Reduction jet pipe (6) is evenly distributed on furnace roof (15) along the length direction of smelting furnace (8).Reduction phase, reduction jet pipe (6) is inserted in copper liquid (7) reduces.After reduction terminates, reduction jet pipe (6) can extract smelting furnace (8) out.The side of smelting furnace (8) is provided with burns rifle (16) for melting, oxidation stage.The side of smelting furnace (8) is provided with burns rifle (16) for melting, oxidation, and the temperature rise period use again of copper liquid.
As shown in Figure 6, Sweet natural gas (1), nitrogen (2) enter mixing tank (5) respectively through natural gas flow control valve group (3) and nitrogen flow control valve group (4).The oxygen level of the copper liquid (7) in smelting furnace (8) is measured with instrument (14), and the oxygen level signal feedback measured is to PLC control module (11).When the copper liquid oxygen level of monitoring exceeds the highest set(ting)value given in advance in PLC control module (11), control Sweet natural gas and nitrogen flow make Sweet natural gas and nitrogen enter after mixing tank (5) mixing with higher ratio of mixture and reduce jet pipe (6) by natural gas flow control valve group (3) and nitrogen flow control valve group (4).When the oxygen level of the copper liquid (7) of monitoring is lower than minimum set(ting)value given in advance, adjustment Sweet natural gas and nitrogen flow make the ratio of mixture of Sweet natural gas and nitrogen reduce until the oxygen level of copper liquid is reduced to require index by flowrate control valve group (3) and (4).Mixed Sweet natural gas and nitrogen are connected to reduction jet pipe (6).Reduction jet pipe (6) is evenly distributed on furnace roof (15) along the length direction of smelting furnace (8).Reduction phase, reduction jet pipe (6) is inserted in copper liquid (7) reduces.After reduction terminates, reduction jet pipe (6) can extract smelting furnace (8) out.The side of smelting furnace (8) is provided with burns rifle (16) for melting, oxidation, and the temperature rise period use again of copper liquid.
Claims (5)
1. adopt the mixed gas of Sweet natural gas and nitrogen to reduce the device of oxygen-bearing copper liquid, it is characterized in that, comprising:
Natural gas supply device (1), it is connected with mixing tank (5), for providing Sweet natural gas to mixing tank (5) by natural gas flow control valve group (3);
Nitrogen supply (NS) device (2), it is connected with mixing tank (5), for providing nitrogen to mixing tank (5) by nitrogen flow control valve group (4);
Mixing tank (5), it is connected, for providing the mixed gas of Sweet natural gas and nitrogen to copper liquid (7) with reduction jet pipe (6);
Smelting furnace (8), for splendid attire oxygen-bearing copper liquid to be restored;
PLC control module (11), its one end is connected with natural gas flow control valve group (3) and nitrogen flow control valve group (4), the other end is connected with the Monitoring equipment being placed in smelting furnace (8), for controlling the blending ratio of described Sweet natural gas and nitrogen.
2. device according to claim 1, the Monitoring equipment (14) that the oxygen level of the copper liquid (7) that the Monitoring equipment being placed in smelting furnace (8) described in it is characterized in that is selected from flue outlet (9) place's smoke temperature change of described smelting furnace (8) and the Monitoring equipment (10) of CO concentration in flue gas change, the Monitoring equipment (13) of the furnace temperature change of described smelting furnace (8) and furnace gas CO change in concentration or described smelting furnace (8) changes.
3. device according to claim 1, is characterized in that described reduction jet pipe (6) is inserted in smelting furnace (8) by charging opening (12).
4. device according to claim 1, is characterized in that described reduction jet pipe (6) is inserted in smelting furnace (8) by smelting furnace furnace roof (15).
5. device according to claim 1, it is characterized in that the side of described smelting furnace (8) is provided with and burn rifle (16), for melting and oxidation stage, and copper liquid heats up again.
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| CN201420472531.6U CN204080058U (en) | 2014-08-20 | 2014-08-20 | The mixed gas of Sweet natural gas and nitrogen is adopted to reduce the device of oxygen-bearing copper liquid |
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| CN201420472531.6U CN204080058U (en) | 2014-08-20 | 2014-08-20 | The mixed gas of Sweet natural gas and nitrogen is adopted to reduce the device of oxygen-bearing copper liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349798A (en) * | 2014-08-20 | 2016-02-24 | 空气化工产品有限公司 | Method and apparatus for reducing oxygen-containing copper liquid by using natural gas and nitrogen gas mixing gas |
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2014
- 2014-08-20 CN CN201420472531.6U patent/CN204080058U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349798A (en) * | 2014-08-20 | 2016-02-24 | 空气化工产品有限公司 | Method and apparatus for reducing oxygen-containing copper liquid by using natural gas and nitrogen gas mixing gas |
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