CN104313345A - Method for energy conservation of low-cost equipment for smelting of high-quality anode plate from low-grade copper - Google Patents
Method for energy conservation of low-cost equipment for smelting of high-quality anode plate from low-grade copper Download PDFInfo
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Abstract
The invention belongs to the technical field of copper processing, and provides a method for energy conservation of low-cost equipment for smelting of a high-quality anode plate from low-grade copper. A piece of existing technical equipment including a shaft furnace cannot perform smelting on the low-grade copper. According to the method, a shaft furnace burner is controlled to form a high-temperature circulating gas flow, the temperature of the high-temperature circulating gas flow is controlled, temperature of heat-preservation chutes is increased, and gas properties, smoke flowing manners and flowing manners of copper smelting liquid in a shaft furnace, oxidizing furnaces and reduction furnaces are controlled, so that the low-cost equipment adopting low-grade copper material can smelt copper into the high-quality anode plate in a continuous energy-saving manner, and pressure on the technology for electrolysis of the anode plate and cost for electrolysis of the anode plate are reduced.
Description
Technical field
The present invention relates to copper processing techniques field, is the power-economizing method that a kind of low-grade copper smelts high-quality positive plate low cost equipment.
Background technology
Since nearly two more than ten years, Copper fabrication is in China every year with double-digit speed increment, and Copper fabrication product plays an increasingly important role in Chinese national economy and high-tech sector.But China's Copper fabrication industry development exists the 'bottleneck' restrictions of high-purity copper shortage of raw materials, from a large amount of copper scap, smelt qualified highly purified positive plate becomes the key of capturing development bottleneck.The major equipment of existing smelting positive plate is reverberatory furnace, but the flue dust temperature of reverberatory furnace outlet is at about 1200 DEG C, and the energy more than 40% of reverberatory smelting positive plate is wasted in high-temperature smoke.In theory, shaft furnace and reverberatory furnace combine, oxidising process, the reduction process that the fusing of copper raw material be responsible for by shaft furnace, copper melt is responsible for by reverberatory furnace, propose many patent applications on the one hand at this for this reason, existing patent application is essentially the composition conception of equipment, and a kind of like this equipment smelting low-grade copper raw material is seemingly feasible.But past several years, up to the present enough can only smelt very high purity at Copper fabrication material industry shaft furnace and reverberatory furnace combination and reach 99.90% and above adopting electrolysis residual pole, smelted into positive plate, as patent of invention " regeneration novel process adopting electrolysis residual pole pyrogenic ", publication number CN101654792A, publication date on February 24th, 2010; Copper scap smelted by the equipment that shaft furnace and reverberatory furnace also could not be adopted to combine in Copper fabrication material industry, and the reverberatory furnace that existing copper scap still can only adopt energy dissipation very serious is in smelting.
Why to be applicable to the energy-conservation smelting process of copper scap raw material very difficult in research and development, because these research and development need to drop into a large amount of funds, build the testing outfit system that a set of shaft furnace adds reverberatory furnace and will spend millions of unit, shaft furnace adds reverberatory furnace change system to be tested once light starting material and will spend about 2,000,000 yuan.
From 2011, China's Copper fabrication material industry has concentrated the strength of production, teaching & research to carry out, and research and development are tackled key problems, under the subsidy of the Department of Science and Technology, contriver has carried out research and development low-grade copper scap short route melting continuously production technique, critical equipment, and the research and development index low-grade copper of project is clearly the copper scap lower than 94%.
Therefore, the Copper fabrication material technical background of copper scap is smelted relative to existing reverberatory furnace, capture the bottleneck of the high-purity copper shortage of raw materials of China's Copper fabrication material development, copper content 60wt% and above low-grade copper raw material are smelted into the power-saving technology of high purity positive plate by research and development shaft furnace in conjunction with reverberatory furnace equipment, be very important, also be challenging difficulty, the secondary blister copper that low-grade copper raw material is smelted as recycled copper, copper scap, copper scap, the blister copper etc. of copper matte regulus smelting; On the other hand, research and development improve smelts the higher positive plate technology of purity containing shaft furnace equipment, for reducing the cost of electrolytic anode plate and raising the efficiency, is also very important.
Summary of the invention
The object of the invention is to add for existing shaft furnace the practical situation that reverberatory furnace normally cannot smelt low-grade copper raw material, invent a kind of method copper content is adopted at 60wt% and above low-grade copper raw material the low cost equipment containing shaft furnace is normal to be smelted, and energy-conservationly smelt highly purified positive plate.Reverberatory furnace namely invent in redox stove.
A kind of low-grade copper of the present invention smelts the power-economizing method of high-quality positive plate low cost equipment, low cost equipment comprises a shaft furnace, at least two oxidized stills, at least two reduction furnaces, a set of flue dust total systems, copper content 60wt% of the present invention and above low-grade copper raw material can be normal and melting continuously becomes copper content to be greater than 99.10wt% high-quality positive plate, and low-grade copper raw material is at least one of following raw materials according: recycled copper, copper scap, the secondary blister copper smelted by copper scap, the blister copper smelted by copper matte regulus, pass through at least two reserved row's copper mouths between shaft furnace and oxidized still and add a cover thermal insulation chute to be connected, shaft furnace continuous melting low-grade copper, at least two oxidized stills accept the copper melt of shaft furnace in turn to its rated capacity, respectively cupric oxide liquation, again by cupric oxide liquation by the reserved row's copper mouth of oxidized still with add a cover thermal insulation chute and be transported to reduction furnace, reduce in reduction furnace, be then incubated, be finally cast into high-quality positive plate, the combustion gas controlling shaft furnace is reductibility, reduction furnace combustion gas is reductibility, the combustion gas of oxidized still is oxidisability, and shaft furnace flue dust enters reduction furnace respectively by its utilidor, high temperature blower, reduction furnace flue dust enters bottom shaft furnace respectively by its utilidor, high temperature blower part, and part enters the oxidized still matched with it, oxidized still flue dust by its utilidor, enter qualified discharge after flue dust main pipeline, flue dust total system, this flue dust main pipeline outside weld tracheae, good lagging material is housed outside tracheae, at least two kinds of tracheaes utilize the high-temperature smoke flow through in this flue dust main pipeline to heat air tracheae, the empty nitrogen tracheae divided respectively, preheated air distributes to by control that shaft furnace burner is combustion-supporting, oxidized still burner is combustion-supporting, reduction furnace burner is combustion-supporting, pre-hot nitrogen passes into the even spray apparatus of gas just in the reduction furnace of reduction process by security solenoid valve, evenly enter copper melt pond, accelerate the reduction of copper melt, pass into the even spray apparatus of gas just in the oxidized still of oxidising process containing the empty oxygen rich gas of oxygen that divides by security solenoid valve, evenly enter copper melt pond, accelerate the oxidising process of low-grade copper liquation, shaft furnace fusing low-grade copper, consider that reduction furnace combustion gas enters the impact bottom shaft furnace, by the air of multiple shaft furnace burner and the adjustment of fuel quantity supply, realize the lapse of temperature from top to bottom of whole stock column, and only melt bottom stock column, the burner descending most row to be responsible for melting bottom stock column at shaft furnace forms cyclic high-temperature gas-flow, this cyclic high-temperature gas-flow is reductibility, bottom continuous fusing low-grade copper stock column, stock column is constantly descending, require to add low-grade copper packing material block according to low-grade copper furnace run at the top of shaft furnace, maintain whole stock column height substantially constant, and this cyclic high-temperature gas-flow sweeps along a low-grade copper liquation tiltedly descending journey, then turn back above copper melt stream, cyclic high-temperature gas-flow is left in the combustion gas that wherein part is turned back on the one hand, then along shaft furnace stock column up one section, and by shaft furnace utilidor, high temperature blower enters reduction furnace respectively, the burner that the amount that this part turns back combustion gas descends row to be responsible for melting bottom stock column most by shaft furnace supplements to cyclic high-temperature gas-flow, on the other hand after low-grade copper liquation and cyclic high-temperature gas jet separation by inertia through the path of the shortest high temperature the most smoothly, pass through the oxidized still arranging copper mouth, add a cover thermal insulation chute, enter preheating, add a cover thermal insulation chute to have reductibility combustion gas to work in coordination with, ensure the proper flow of low-grade copper liquation, this cyclic high-temperature gas-flow, this adds a cover the reductibility combustion gas 1120 ~ 1400 DEG C of thermal insulation chute, and temperature increases respectively along with the reduction of copper content in raw material, when by one of them row's copper mouth and add a cover copper melt that thermal insulation chute flows into an oxidized still reach the rated capacity of this oxidized still time, reduce the fuel of shaft furnace burner corresponding with this row's copper mouth and the supply of air, make the fusing bottom the cooling of this cyclic high-temperature gas-flow, time-out shaft furnace stock column, this row's copper mouth of shutoff, then carries out the oxidation of copper melt in this oxidized still, open the Pai Tongkou be connected with the oxidized still of another preheating that shaft furnace is reserved simultaneously, control the shaft furnace burner relative with this row's copper mouth and form another cyclic high-temperature gas-flow, restart bottom fusing shaft furnace stock column, by this row's copper mouth and communicate with it add a cover a thermal insulation chute oxidation fire grate copper melt backward, until reach the specified copper melt amount of this oxidized still, then suspend the fusing of shaft furnace low-grade copper stock column, in normal melting continuously process, the bottom of continuous melting low-grade copper raw material stock column like this, respectively at different oxidized still oxidation low-grade copper liquation, respectively at the reduction of different reduction furnaces, insulation casting high-quality positive plate, when the low cost change system of low-grade copper raw material performs stopping smelting program as required, first stop the reinforced of shaft furnace stock column top, the stock column that shaft furnace is remaining all melts away, bottom peace and quiet shaft furnace, adjust shaft furnace burner, oxidized still burner, the air of reduction furnace burner and fuel respectively, the frequency modulation blower fan of adjustment shaft furnace and reduction furnace gas blower, flue dust total system, completes the last oxidising process of copper melt, reduction process, insulation casting positive plate process, flameless combustion mode taked by oxidized still burner, reduction furnace burner.
A kind of low-grade copper of the present invention smelts the power-economizing method of high-quality positive plate low cost equipment, and smelting high-grade copper is more energy-conservation.
A kind of low-grade copper of the present invention smelts the power-economizing method of high-quality positive plate low cost equipment, the oxygen rich gas that oxygen content is greater than 21% is accessed just at the even spray apparatus of the oxidized still of cupric oxide liquation by security solenoid valve, and the mode that oxygen rich gas sprays into copper melt at least takes one of following manner: end spray, top spray, side spray.
Compared with prior art, the present invention has following remarkable superiority:
1. pair high-purity adopting electrolysis residual pole, prior art is " best unit consumption index is 58 kilograms of marks coal/ton positive plate (not comprising electricity, water, steam and reduction); average index 65 kilograms mark coal ", the technology of the present invention unit consumption is 51.8 kilograms of mark coal/ton positive plates, average index is that 54.2kg marks coal/t positive plate, there is significant energy-saving effect, and smelt the higher positive plate of purity;
2. adopt low-grade copper raw material, prior art actually to be smelted, and the present invention can melting continuously, and achieve low-grade copper raw material and adopt that low cost equipment is normal to be smelted, as 1 shaft furnace joins 2 oxidized stills, 2 reduction furnaces, annual capacity reaches more than 250,000 tons;
3. add oxidation reduction furnace low cost equipment relative to shaft furnace, the equipment and technique of shaft furnace of the present invention, oxidized still, reduction furnace can smelt the higher positive plate of purity.
Embodiment
Embodiment 1
The blister copper that the copper scap of raw copper content 60.0wt% and copper matte regulus are smelted, what low cost was equipped is configured to 1 shaft furnace, 2 oxidized stills, 2 reduction furnaces, fuel heavy oil, the combustion gas controlling shaft furnace is reductibility, reduction furnace combustion gas is reductibility, the combustion gas of oxidized still is oxidisability, and shaft furnace flue dust enters reduction furnace respectively by its utilidor, high temperature blower, reduction furnace flue dust enters bottom shaft furnace respectively by its utilidor, high temperature blower part, and part enters the oxidized still matched with it, oxidized still flue dust by its utilidor, enter qualified discharge after flue dust main pipeline, flue dust total system, this flue dust main pipeline outside weld tracheae, good lagging material is housed outside tracheae, at least two kinds of tracheaes utilize the high-temperature smoke flow through in this flue dust main pipeline to heat air tracheae, the empty nitrogen tracheae divided respectively, preheated air distributes to by control that shaft furnace burner is combustion-supporting, oxidized still burner is combustion-supporting, reduction furnace burner is combustion-supporting, pre-hot nitrogen passes into the even spray apparatus of gas just in the reduction furnace of reduction process by security solenoid valve, evenly enter copper melt pond, accelerate the reduction of copper melt, pass into the even spray apparatus of gas just in the oxidized still of oxidising process containing the empty oxygen rich gas of oxygen that divides by security solenoid valve, evenly enter copper melt pond, accelerate the oxidising process of low-grade copper liquation, shaft furnace fusing low-grade copper, consider that reduction furnace combustion gas enters the impact bottom shaft furnace, by the air of multiple shaft furnace burner and the adjustment of fuel quantity supply, realize the lapse of temperature from top to bottom of whole stock column, and only melt bottom stock column, this flue dust main pipeline outside weld tracheae, good lagging material is housed outside tracheae, at least two kinds of tracheaes utilize the high-temperature smoke flow through in this flue dust main pipeline respectively to air tracheae, the nitrogen tracheae of empty point heats, it is combustion-supporting that preheated air distributes to shaft furnace burner by control, oxidized still and reduction furnace burner combustion-supporting, pre-hot nitrogen passes into just at the even spray apparatus of the gas of reduction process by security solenoid valve, evenly enter copper melt pond, accelerate the reduction of copper melt, oxygen rich gas containing 98% by security solenoid valve pass into just oxidising process the even spray apparatus bottom blowing of gas, evenly enter copper melt pond, accelerate the oxidising process of low-grade copper liquation, shaft furnace fusing low-grade copper, realize the lapse of temperature from top to bottom of whole stock column, and only melt bottom stock column, the burner descending most row to be responsible for melting bottom stock column at shaft furnace forms cyclic high-temperature gas-flow, this cyclic high-temperature gas-flow is reductibility, bottom continuous fusing low-grade copper stock column, stock column is constantly descending, and this cyclic high-temperature gas-flow sweeps along a low-grade copper liquation tiltedly descending journey, path is incubated by inertia the most smoothly through the shortest after low-grade copper liquation and cyclic high-temperature gas jet separation, by row's copper mouth, add a cover thermal insulation chute, enter the oxidized still of preheating, adding a cover thermal insulation chute has the reductibility combustion gas of high enough temp to work in coordination with, ensure the proper flow of low-grade copper liquation, this cyclic high-temperature gas-flow, the reductibility combustion gas of this thermal insulation chute is at 1400 DEG C, when the copper melt being flowed into an oxidized still by one of them row's copper mouth and thermal insulation chute reaches the rated capacity of this oxidized still, reduce the fuel of shaft furnace burner corresponding with this row's copper mouth and the supply of air, make the fusing bottom the cooling of cyclic high-temperature gas-flow, time-out shaft furnace stock column, inject copper melt to oxidized still in turn, carry out oxidation, reduction, insulation casting positive plate at different oxidized still, reduction furnace respectively, oxidized still, reduction furnace burner all take flameless combustion mode in copper melt oxidising process, in reduction process, low cost equipment normally can smelt high-quality positive plate, average copper content 99.15wt%, and through statistics heavy oil Dosage calculation, being converted to mark coal average index is that 64.9kg marks coal/t positive plate.
Embodiment 2
Raw material is the secondary blister copper that Cu content 72.8wt% copper scap and copper scap are smelted; Fuel is Sweet natural gas; Dry oxygen rich gas connects even spray apparatus top blast containing oxygen 85%, and the reductibility combustion gas of cyclic high-temperature gas-flow temperature 1360 DEG C, thermal insulation chute is at 1250 DEG C; Other is identical with embodiment 1; Above-mentioned low cost equipment normally can smelt high-quality positive plate, average copper content 99.20wt%, and through statistics Sweet natural gas consumption, being converted to mark coal average index is that 61.9kg marks coal/t positive plate.
Embodiment 3
Raw material is the secondary blister copper that Cu content 88.3wt% copper scap and copper scap are smelted; Fuel is Sweet natural gas; Dry oxygen rich gas connects even spray apparatus top blast and side-blown containing oxygen 75%, and the reductibility combustion gas of cyclic high-temperature gas-flow temperature 1340 DEG C, thermal insulation chute is at 1240 DEG C; Other is identical with embodiment 1; Above-mentioned low cost equipment normally can smelt high-quality positive plate, average copper content 99.26wt%, and through statistics Sweet natural gas consumption, being converted to mark coal average index is that 56.1kg marks coal/t positive plate.
Embodiment 4
Raw material is Cu content 96.7wt% blister copper and copper scap; Fuel is Sweet natural gas; Low cost equipment configurations is 1 shaft furnace, 3 oxidized stills, 3 reduction furnaces, and annual capacity expands as 350,000 tons of high-quality positive plates; Dry oxygen rich gas connects even spray apparatus bottom blowing and side-blown containing oxygen 76%, and the reductibility combustion gas of cyclic high-temperature gas-flow temperature 1200 DEG C, thermal insulation chute is at 1180 DEG C; Other is identical with embodiment 1; Above-mentioned low cost equipment normally can smelt high-quality positive plate, average copper content 99.23wt%, and through statistics Sweet natural gas consumption, being converted to mark coal average index is that 54.2kg marks coal/t positive plate.
Embodiment 5
Raw material is adopting electrolysis residual pole; Fuel is Sweet natural gas; Dry oxygen rich gas connects the side-blown of even spray apparatus containing oxygen 36%, and the reductibility combustion gas of cyclic high-temperature gas-flow temperature 1140 DEG C, thermal insulation chute is at 1120 DEG C; Other is identical with embodiment 1; Above-mentioned low cost equipment normally can smelt high-quality positive plate, average copper content 99.90wt%, and through statistics Sweet natural gas consumption, being converted to mark coal average index is that 53.5kg marks coal/t positive plate.
Comparative example 1 adopts the technology of patent CN101654792A, and raw material is adopting electrolysis residual pole, and smelting average index is that 65kg marks coal/t positive plate, and purity only has 98.35wt%.
Why more energy-conservation embodiment 5 is with comparative example 1 is because the present invention makes full use of the heat energy of the flue dust of shaft furnace, oxidized still and reduction furnace flue dust, the flue dust of shaft furnace is made to enter reduction furnace, make reduction furnace soot fraction enter shaft furnace, part enters oxidized still, the nitrogen of air and empty point is heated, use oxygen-rich air is oxidized, controlled circulation high-temperature fuel gas only melts bottom shaft furnace stock column, and the burner of oxidized still, reduction furnace all takes flameless combustion mode etc. in oxidising process, reduction process; And be separated into oxidized still, reduction furnace due to redox stove, make the purity of the positive plate smelted higher, for electrolysis process is cost-saving and the time.
Comparative example 2 ~ comparative example 5
Adopt patent CN101654792A and the existing invention technology containing shaft furnace, the composition of embodiment 1, embodiment 2, embodiment 3, embodiment 4 is adopted to test respectively, experimental result all exists bottom shaft furnace and blocks, copper melt cannot enter oxidized still, this is namely up to the present except the technology of the present invention, yet there are no other invention technology and can smelt the purity low-grade copper raw material lower than adopting electrolysis residual pole.Analyzing its reason, is because in the past the Traditional Thinking of industry to give full play to the advantage utilizing shaft furnace, not only melting copper raw material in shaft furnace, and the impurity utilizing the molten drop of shaft furnace to try one's best in cupric oxide liquation, on the other hand, in order to make full use of heat energy, by patent of invention and existing usage of trade thinking, by oxidized still flue dust, flue dust in reduction furnace all passes into shaft furnace, through carefully studying analysis, not energy-conservation like this, make the low-melting impurities being in oxidising process evaporation on the contrary, as Zn, Pb etc., the oxide compound of low-melting impurities enters shaft furnace with flue dust, be infected with the copper raw material in shaft furnace stock column, descending with shaft furnace stock column, fusing, again by oxide compound, the metallic particles of low melting point evaporation is brought in copper melt, make in copper melt containing a large amount of oxide impurities, the viscosity of liquation significantly rises, copper melt is caused to freeze bottom shaft furnace, copper melt within 5 hours, also cannot be allowed to flow out at row's copper mouth of shaft furnace, sometimes in chute, there is copper melt flow out but be easy to freeze, shaft furnace such as to scrap at many accidents, all the time cannot normal smelting.
Claims (3)
1. low-grade copper smelts a power-economizing method for high-quality positive plate low cost equipment, and low cost equipment comprises a shaft furnace, at least two oxidized stills, at least two reduction furnaces, a set of flue dust total systems, it is characterized in that:
1) copper content 60wt% and above low-grade copper raw material can be normal and melting continuously becomes copper content to be greater than 99.10wt% high-quality positive plate, and low-grade copper raw material is at least one of following raw materials according: recycled copper, copper scap, the secondary blister copper smelted by copper scap, the blister copper smelted by copper matte regulus; Pass through at least two reserved row's copper mouths between shaft furnace and oxidized still and add a cover thermal insulation chute to be connected, shaft furnace continuous melting low-grade copper, at least two oxidized stills accept the copper melt of shaft furnace in turn to its rated capacity, respectively cupric oxide liquation; Again by cupric oxide liquation by the reserved row's copper mouth of oxidized still with add a cover thermal insulation chute and be transported to reduction furnace, reduce in reduction furnace, be then incubated, be finally cast into high-quality positive plate;
2) combustion gas controlling shaft furnace is reductibility, reduction furnace combustion gas is reductibility, the combustion gas of oxidized still is oxidisability, and shaft furnace flue dust enters reduction furnace respectively by its utilidor, high temperature blower; Reduction furnace flue dust enters bottom shaft furnace respectively by its utilidor, high temperature blower part, and part enters the oxidized still matched with it; Oxidized still flue dust by its utilidor, enter qualified discharge after flue dust main pipeline, flue dust total system; This flue dust main pipeline outside weld tracheae, good lagging material is housed outside tracheae, at least two kinds of tracheaes utilize the high-temperature smoke flow through in this flue dust main pipeline to heat air tracheae, the empty nitrogen tracheae divided respectively, preheated air distributes to by control that shaft furnace burner is combustion-supporting, oxidized still burner is combustion-supporting, reduction furnace burner is combustion-supporting, pre-hot nitrogen passes into the even spray apparatus of gas just in the reduction furnace of reduction process by security solenoid valve, evenly enter copper melt pond, accelerate the reduction of copper melt; Pass into the even spray apparatus of gas just in the oxidized still of oxidising process containing the empty oxygen rich gas of oxygen that divides by security solenoid valve, evenly enter copper melt pond, accelerate the oxidising process of low-grade copper liquation;
3) shaft furnace fusing low-grade copper, consider that reduction furnace combustion gas enters the impact bottom shaft furnace, by the air of multiple shaft furnace burner and the adjustment of fuel quantity supply, realize the lapse of temperature from top to bottom of whole stock column, and only melt bottom stock column, the burner descending most row to be responsible for melting bottom stock column at shaft furnace forms cyclic high-temperature gas-flow, this cyclic high-temperature gas-flow is reductibility, bottom continuous fusing low-grade copper stock column, stock column is constantly descending, require to add low-grade copper packing material block according to low-grade copper furnace run at the top of shaft furnace, maintain whole stock column height substantially constant, and this cyclic high-temperature gas-flow sweeps along a low-grade copper liquation tiltedly descending journey, then turn back above copper melt stream, cyclic high-temperature gas-flow is left in the combustion gas that wherein part is turned back on the one hand, then along shaft furnace stock column up one section, and by shaft furnace utilidor, high temperature blower enters reduction furnace respectively, the burner that the amount that this part turns back combustion gas descends row to be responsible for melting bottom stock column most by shaft furnace supplements to cyclic high-temperature gas-flow, on the other hand after low-grade copper liquation and cyclic high-temperature gas jet separation by inertia through the path of the shortest high temperature the most smoothly, pass through the oxidized still arranging copper mouth, add a cover thermal insulation chute, enter preheating, add a cover thermal insulation chute to have reductibility combustion gas to work in coordination with, ensure the proper flow of low-grade copper liquation, this cyclic high-temperature gas-flow, this adds a cover the reductibility combustion gas 1120 ~ 1400 DEG C of thermal insulation chute, and temperature increases respectively along with the reduction of copper content in raw material, when by one of them row's copper mouth and add a cover copper melt that thermal insulation chute flows into an oxidized still reach the rated capacity of this oxidized still time, reduce the fuel of shaft furnace burner corresponding with this row's copper mouth and the supply of air, make the fusing bottom the cooling of this cyclic high-temperature gas-flow, time-out shaft furnace stock column, this row's copper mouth of shutoff, then carries out the oxidation of copper melt in this oxidized still, open the Pai Tongkou be connected with the oxidized still of another preheating that shaft furnace is reserved simultaneously, control the shaft furnace burner relative with this row's copper mouth and form another cyclic high-temperature gas-flow, restart bottom fusing shaft furnace stock column, by this row's copper mouth and communicate with it add a cover a thermal insulation chute oxidation fire grate copper melt backward, until reach the specified copper melt amount of this oxidized still, then suspend the fusing of shaft furnace low-grade copper stock column, in normal melting continuously process, the bottom of continuous melting low-grade copper raw material stock column like this, respectively at different oxidized still oxidation low-grade copper liquation, respectively at the reduction of different reduction furnaces, insulation casting high-quality positive plate,
4) when the low cost change system of low-grade copper raw material performs stopping smelting program as required, first stop the reinforced of shaft furnace stock column top, the stock column that shaft furnace is remaining all melts away, bottom peace and quiet shaft furnace, adjust shaft furnace burner, oxidized still burner, the air of reduction furnace burner and fuel respectively, the frequency modulation blower fan of adjustment shaft furnace and reduction furnace gas blower, flue dust total system, completes the last oxidising process of copper melt, reduction process, insulation casting positive plate process;
5) flameless combustion mode taked by oxidized still burner, reduction furnace burner.
2. a kind of low-grade copper according to claim 1 smelts the power-economizing method of high-quality positive plate low cost equipment, it is characterized in that smelting high-grade copper is more energy-conservation.
3. a kind of low-grade copper according to claim 1 smelts the power-economizing method of high-quality positive plate low cost equipment, it is characterized in that the oxygen rich gas that oxygen content is greater than 21% is accessed just at the even spray apparatus of the oxidized still of cupric oxide liquation by security solenoid valve, the mode that oxygen rich gas sprays into copper melt at least takes one of following manner: end spray, top spray, side spray.
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