CN106086416B - A kind of technology that wiring board waste disposal utilizes - Google Patents

A kind of technology that wiring board waste disposal utilizes Download PDF

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Publication number
CN106086416B
CN106086416B CN201610454217.9A CN201610454217A CN106086416B CN 106086416 B CN106086416 B CN 106086416B CN 201610454217 A CN201610454217 A CN 201610454217A CN 106086416 B CN106086416 B CN 106086416B
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CN
China
Prior art keywords
clinker
convertor
waste
copper
circuit board
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CN201610454217.9A
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Chinese (zh)
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CN106086416A (en
Inventor
叶标
许国洪
路永锁
黄中良
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江西自立环保科技有限公司
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Publication of CN106086416A publication Critical patent/CN106086416A/en
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/001Dry processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00Preliminary treatment of ores or scrap
    • C22B1/005Preliminary treatment of scrap
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00Obtaining noble metals
    • C22B11/02Obtaining noble metals by dry processes
    • C22B11/021Recovery of noble metals from waste materials
    • C22B11/025Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper, or baths
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00Obtaining copper
    • C22B15/0026Pyrometallurgy
    • C22B15/0056Scrap treating
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00Obtaining zinc or zinc oxide
    • C22B19/30Obtaining zinc or zinc oxide from metallic residues or scraps
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B21/00Obtaining aluminium
    • C22B21/0007Preliminary treatment of ores or scrap or any other metal source
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B25/00Obtaining tin
    • C22B25/06Obtaining tin from scrap, especially tin scrap
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25CPROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/12Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses a kind of technologies of wiring board waste disposal, using circuit board waste material as raw material, by Mechanical Crushing, oxygen-enriched side-blowing bath melting output is rich in the blister copper of rare precious metal at 1100 DEG C~1400 DEG C, metallic copper is obtained using electrorefining and rich in the earth of positive pole of rare precious metal, melting flue gas is by second-time burning, rapid cooling, dioxin is inhibited to synthesize again, bagroom has recycled the oxide of the metals such as volatile tin, lead, zinc, 0~15 mg/Nm of emptying dust contained flue gas3.Trapping agent can make clinker cupric less than 0.2%, realize that rare precious metal all recycles, and clinker is the waste of silicate-containing, can be used as cement plant raw material or roadbed paving use.The invention enables the recyclings such as circuit board waste material and utilizations, realize more metals and efficiently separate and distinguish enriching and recovering, organic substance is used as fuel, to environment non-secondary pollution.Technological process is short, has significant economic, environmental protection and social benefit.

Description

A kind of technology that wiring board waste disposal utilizes
Technical field
The present invention relates to the wet method combined smelting process technical fields of pyrogenic process-, and in particular to a kind of wiring board waste disposal profit Technology.
Background technology
Electron wastes are the common name of the various electronics close to its " service life " terminal, including waste and old computer, shifting The common electronic products such as mobile phone, television set, VCD machines, speaker, duplicator, facsimile machine, refrigerator, washing machine.Due to technological progress With the decline of price, this kind of product has much just to face when reaching actual life far away eliminates destiny by user.
Electron wastes(Also include leftover bits caused by production electronic circuit board)Yield with annual 3%~5% Speed rapid growth, become the most fast a kind of solid waste of growth rate.The electronics generated every year according to related report, the whole world Up to 50,000,000 tons of waste, it is contemplated that be up to 65,400,000 tons in 2017.
As soon as currently, China is an electronic circuit board big producer, about 1,890,000 tons of China's electron wastes annual output.In advance It counts by 2015, is often only about 60,000 tons of the circuit board waste material generated in production process.If gold therein is only only refined, Value therein is up to 1,800,000,000 yuan.
To the work that the recycling of discarded circuit board waste material, recycling are more early carried out, it is mainly manifested in contained by it The recycling of metal.Its main method has three classes:
(1)Gravity concentration techniques handle useless circuit board.Useless plate, is crushed to by principle of the technology based on gravity separation first Certain granularity is handled it using shaking table then using water as medium, is finally reached the reinforcing materials such as copper and glass fibre The purpose of separation.
(2)Pyrometallurgical smelting technology.Main includes shaft smelting, Kaldo Furnace melting.Pyrogenic attack useless circuit board Advantage is to take full advantage of the glass fibre in useless circuit board, it is made to play the role of flux in fusion process, is formed steady Fixed silicate slag solves the problems, such as that wet-treating passively handles glass fibre clast, and final product is copper bullion, cupric Amount contains micro noble metal generally between 80%~90%.
(3)It burns, smelting technology handles useless circuit board.In useless circuit board fusion process to the pollutant of environment essentially from The burning of organic matter, therefore, the emphasis of the technology are pre-processed to it before useless circuit board enters stove, by organic compound combustion Fall, and flue gas is effectively handled, eliminate pollution of the dioxin to environment, then expects to carry out melting processing to burning again.
According to Research statistics, the main component of mainboard used is each in terms of contained metal material in a computer Metal component is respectively:66.9 % of copper, 10.7 % of tin, 10.3 % of iron, 7.61 % of lead, gold 0.11 %, palladium 0.02 %, Qi Tajin Belong to 4.41 % of ingredient.Metal species contained in circuit board waste material are mainly copper.Its amount is in the % of 20 %~40.Online Also contain flame retardant constituent in the resin of road board waste material, and fire retardant is mainly compound containing bromine, antimony oxide, phosphorus compound Deng.Before carrying out the refining recycling of copper to discarded circuit board waste material, it is necessary to separate these impurities, this is guarantee fund Belong to key safe in removal process.Contain the precious metals such as gold, palladium in discarded circuit board waste material.Containing gold, palladium at In the tcrude ore divided, their amount there was only 10 ppm hereinafter, and gold, palladium content in discarded circuit board waste material are raw ores As many as 2~20 times of this content in stone.Therefore carrying out the recycling to gold, palladium metal has prodigious development prospect. Have and research and analyse the results show that in 1 ton of electronics board arbitrarily collected, can isolate 143 kg copper, 0.5 g gold, 40.8 G iron, 29.5 g lead, 2.0 g tin, 18.1 g nickel, 10.0 g antimony.
Electron wastes not only enormous amount, but also endanger serious, human and environment will be caused serious two by dealing with improperly Secondary harm.6 kinds of harmful substances are mainly contained in waste household appliance:Lead, cadmium, mercury, Cr VI, igelite, bromination resistance Fire agent.
The reasonable treatment approach of electron wastes should fully realize its recycling, and waste is made to reenter people " substance-energy circulation " system inside class industrial system reduces the place burn, throw aside, filling etc. and increasing ecological environment burden Reason mode.
Invention content
In view of the deficiencies of the prior art, the object of the present invention is to provide it is a kind of it is safe and reliable, steadily to carry out wiring board useless Expect the wet method combined smelting process technology and equipment of pyrogenic process-that recycling recycles.The technology of the present invention is initiated at home, is solved Secondary pollution problem of the dioxin to environment.
Problem to be solved by this invention is the recycling regeneration of circuit board waste material and utilizes, in addition to recycling heavy metal and expensive Outside metal, other resins, rubber, plastics and glass fibre etc. are also all fully utilized as matter energy element.
To achieve the goals above, technical solution of the present invention is:
A kind of technology that wiring board waste disposal utilizes, using circuit board waste material as raw material, which includes Mechanical Crushing, fire Method melting and wet method electrolysis technique:
(1)Broken to circuit board waste material shredding machine or gyratory crusher, it is that the cm of 10 cm × 10 are below to form granularity Fragment;It is preferred that the fragment granularity cm × 8 of cm~8 of 2 cm × 2 cm;
(2)Wiring board pieces of waste material, coal dust, electric furnace heat preservation clinker are carried out in bilateral bottom convertor hereinafter referred to as bottom convertor Melting ensures that clinker slag type is stablized;Wherein, the organic components in circuit board waste material and potential energy substance, in high temperature melting During refining, used as fuel;
(3)The flue-gas temperature that the reaction in bottom convertor generates is controlled, is protected using including divulging information and provide enough spaces The organic matter completely burned of volatilization is demonstrate,proved, while recycling flue dust, prevents the generation of dioxin;
(4)When the liquid level of melt is higher by than headwall slag-drip opening, stops that wiring board pieces of waste material is added, clinker is discharged into It is kept the temperature in electric mantle heater, restores charging after deslagging and carry out melting, deslagging and charging process are repeated, until the liquid level of melt Go up to below slag-drip opening when 100 mm~200 mm, stops fusion process;
(5)Clinker is kept the temperature in electric furnace, hearth layer when being next stove furnace lifting melting;
(6)Spray gun is inserted into melt, sprays into fine coal, oxygen-enriched air converting is carried out, blister copper is obtained after blowing, blister copper is cast into anode Plate;It is preferred that when blowing, ensure Control for Kiln Temperature at 1200 DEG C~1250 DEG C, oxygen concentration is the % of 40 %~50, and oxygen is blown into Pressure is 170 ± 20 kPa;
(7)It send copper anode plate to electrolysis system manufacture electrolysis copper products, digs out the earth of positive pole from electrolytic cell and send rare precious metal Gold, silver and platinum group metal are recycled in workshop, are recycled rich in tin, lead, the flue dust of zinc and Waste Slag.
Further, step(1)In, it includes computer, mobile phone, the TV scrapped that the circuit board waste material, which derives from, The wiring board disassembled on machine, VCD machines, speaker, duplicator and facsimile machine product also includes in electronic product machining manufacturing process Waste.
Further, step(2)In, when melting, pulverized coal consumption 12%~25%, in 1100 DEG C~1400 DEG C of temperature, oxygen-enriched Melting is burned under concentration 20 %~70 %, 150~190 kPa of oxygen-enriched pressure;When copper mouth blister copper grade copper be more than 90%, clinker into Enter electric mantle heater.
Further, step(2)In, coal dust is blown by furnace roof in stove, and circuit board waste material is put by feeding warehouse, 1200 DEG C~1250 DEG C at completely burned decompose;Clinker in electric furnace holding furnace is what bottom convertor slag-drip opening was released, wherein being rich in silicic acid Salt and calcium oxide, as rebasing clinker when feeding intake again, to ensure that clinker slag type is stablized.
Further, step(2)In, wiring board pieces of waste material is continuously added to the t/h of 5 t/h~50 into stove, coal dust is used Amount is to put into the % of 12 %~25 of circuit board waste material, the content of copper, calcium oxide and silica in periodic detection clinker, addition trapping Agent, trapping agent additive amount keep clinker to keep clinker copper content to be fully entered in acid bronze alloy less than 0.2 %, rare precious metal Middle calcium oxide 30 %~35 %, silica are standard in the % of 30 %~32;Oxidation is added when calcium oxide component reduces in slag type Calcium;It is preferred that trapping agent additive amount is 5 %-15 % of circuit board waste material.
Further, step(5)In, electric mantle heater clinker 30 %~50 % are returned into bottom convertor as flux cycle when dispensing It uses, while being incorporated trapping agent, clinker copper content is less than 0.2 % to trapping agent additive amount, rare precious metal fully enters copper to keep In based alloy, calcium oxide 30 %~35 %, silica are standard in the % of 30 %~32 in holding clinker;It will be isolated in electric furnace Black copper, which is returned, to be continued to be smelted into blister copper into bottom convertor;It is preferred that trapping agent additive amount is 5 %-15 % of circuit board waste material.
Further, the bottom convertor, hearth area 4-15m2, lower portion of furnace body covers group by Copper Water Jacket, top by molten iron At tuyere area is located at slag blanket, and flue is arranged with waste heat boiler integrated at the top of furnace body, and configures second-time burning air port.
Further, step(3)In, bottom convertor smoke and waste steam boiler sets two sections, be respectively second-time burning flue at the top of furnace body, Flue-gas temperature is down to 550 DEG C~680 DEG C by membrane wall radiation chamber from 1150 DEG C~1250 DEG C;
Further preferably, chilling tower is arranged in the bottom blowing kiln gas after waste heat boiler, is sprayed with water, by flue-gas temperature 200 DEG C are down to hereinafter, preventing dioxin from synthesizing again in 1.5 ± 0.5 seconds from 550 DEG C~680 DEG C;
Further preferably, activated carbon injection apparatus and bag pulse dedusting is arranged in the bottom blowing kiln gas after chilling tower Device collects remaining dioxin absorption on the activated carbon and in bag filter, and the flue dust of the % of 20 %~80 returns Continue to recycle with fresh activity charcoal mixing jetting, remainder flue dust is as tin, the resource reutilization of lead, zinc;
Further preferably, wet desulfurizer is arranged in the bottom blowing kiln gas after bag filter, removes in flue gas Sulfur dioxide, make sulfur dioxide emissioning concentration be less than 150 mg/Nm3
Further preferably, the progress depth dedusting of electrostatic precipitation demister is arranged in the bottom blowing kiln gas after desulfurizing tower Demisting, dustiness is less than 15 mg/Nm in thoroughly excluding acid mist emission and making the flue gas of discharge3
Further, step(4)In, the clinker overflowed from electric mantle heater passes through water quenching, is manufactured as cement is sold to outside waste Factory or roadbed paving are used, and obtained black copper, which is returned, to be continued to be smelted into blister copper into bottom convertor;
It is preferred that glass fiber component can be used as the slag former of melting in the circuit board waste material, the water of generation Discarded Copper in Slag of quenching is less than 0.2 %.
In the above technology:
It is used the organic matters such as rubber, resin, plastics in wiring board pieces of waste material as potential " energy ", makes carbon therein Hydrogen bond completely burned under oxygen-enriched and hot conditions, burning is an exothermic reaction, to improve and keep the temperature of bottom convertor 1100 DEG C -1400 DEG C of degree.
Using coal dust as fuel and reducing agent, additive amount is the % of 12 %~25 so that valuable metal oxygen in circuit board waste material Change and reduction, generation acid bronze alloy melt are incorporated trapping agent, to trap heavy metals and noble metal, and tin, lead, zinc etc. are easily waved Hair property metal enters flue dust with oxide, is recycled through bagroom.
Using glass fibre in circuit board waste material as a kind of additive of supplement of bottom convertor, silicon, calcium, magnesium, iron etc. are made Slag removes, and clinker passes through Water Quenching, is used as construction material, the clinker rate % of 30 %~40, and cupric is less than 0.2 %.
Clinker in bottom convertor is put into electric mantle heater, is fully isolated acid bronze alloy from the clinker of molten condition;It protects Clinker can return in the bottom convertor of input circuit board waste material again in warm electric furnace, and the supplying % of 10 %~30 calcium oxide is to trap circuit Silica composition in board waste material in glass fibre.
Blister copper molten mass casting copper anode plate, is more than 90% containing copper grade.
Advantageous effect of the present invention:
1. adaptable to wiring board waste components, stock is simple.
2. can guarantee that organic substance fully burns in circuit board waste material under the hot conditions of bottom convertor, reach 99.9 % or more Resolution rate.
3. taking full advantage of potential energy element in circuit board waste material, energy consumption has been saved.
4. electric mantle heater can keep clinker to be in molten condition always, recyclable to melt down use, clinker is taken full advantage of Latent heat has saved the energy consumption of furnace lifting again.
5. glass fibre in circuit board waste material is utilized, the use of slag former has been saved.Addition trapping agent can reduce clinker Cupric is less than 0.2 % so that rare precious metal all fuses into blister copper alloy.
6. flue gas secondary combustion flue is arranged at the top of bottom convertor so that organic components are fully burnt again in flue gas, are made Dioxin decomposes.
7. equipment needed for is brief, and floor space is small, and cost of investment is low.
8. non-ferrous metal and precious and rare metals recovery rate are high, to environment non-secondary pollution.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific implementation mode
With reference to embodiment, the invention will be further described, following embodiment be intended to illustrate invention rather than it is right The present invention's further limits.
Embodiment 1:
As shown in Figure 1, technological process:
(1)By waste electrical equipment(Waste and old computer, mobile phone, television set, VCD machines, speaker, duplicator, facsimile machine, The common electronic product such as automobile electronics)It is disassembled, sort out circuit board waste material.
(2)Broken to circuit board waste material shredding machine or gyratory crusher, it is cm × 8 the cm~8 of 2 cm × 2 to form granularity The fragment of cm.
(3)According to 20:3:7 weight ratio is to 12m2Bilateral bottom convertor(Hereinafter referred to as bottom convertor)Middle input circuit board waste material Fragment, coal dust, electric furnace keep the temperature clinker.Coal dust is blown by furnace roof in stove, and circuit board waste material is put by feeding warehouse, at 1200 DEG C It burns at~1250 DEG C and decomposes completely.Clinker in electric furnace holding furnace is what bottom convertor slag-drip opening was released, wherein being rich in silicate And calcium oxide, as rebasing clinker when feeding intake again, to ensure that clinker slag type is stablized.
(4)Step 2 wiring board pieces of waste material is continuously added to 30 t/h into stove, copper, oxidation in periodic detection clinker The content of calcium and silica, to keep, clinker copper content is less than 0.2 % to addition trapping agent, rare precious metal fully enters acid bronze alloy In, calcium oxide 30 %~35 %, silica are in the % of 30 %~32 in holding clinker.It is added when calcium oxide component reduces in slag type Calcium oxide.
(5)Emphasis is the flue-gas temperature that control reaction generates, and prevents the generation of dioxin.The eye of wind of bottom convertor upper furnace Secondary Air can be effectively supplemented, and there are enough spaces to ensure the organic matter of volatilization at a temperature of 1200 DEG C~1250 DEG C Completely burned.Lead and a tin part enter flue dust, and a part enters clinker.Enter in slag after iron, manganese, alumina.
(6)Bottom convertor smoke and waste steam boiler sets two sections, is second-time burning flue, membrane wall radiation chamber at the top of furnace body respectively, Flue-gas temperature is down to 600 DEG C~680 DEG C from 1150 DEG C~1250 DEG C.Chilling tower is arranged in flue gas after waste heat boiler, uses Water sprays, and flue-gas temperature is down to 200 DEG C from 600 DEG C~680 DEG C in 1.5 seconds, prevents dioxin from synthesizing again.
(7)Activated carbon injection apparatus and pulsed jet cloth filter is arranged in flue gas after chilling tower, and remaining dioxin is inhaled Attached to collect on the activated carbon and in bag filter, the amount of 50 % of flue dust is used with active powdered carbon mixing circulation, remaining The flue dust of 50 % amounts is as tin, the resource reutilization of lead, zinc.
(8)Wet desulfurizer is arranged in flue gas after bag filter, removes the sulfur dioxide in flue gas, makes sulfur dioxide 0~150 mg/Nm of concentration of emission3
(9)Electrostatic precipitation demister is arranged after desulfurizing tower and carries out depth dedusting demisting for flue gas, thoroughly excludes acid mist row It puts and makes 0~15 mg/Nm of dustiness in the flue gas of discharge3
(10)When the liquid level of melt is higher by 0.3 m~0.5 m than headwall slag-drip opening, it is broken to stop addition circuit board waste material Piece first opens slag-drip opening, and clinker is discharged into electric mantle heater and is kept the temperature, and after deslagging, closes slag-drip opening, restores charging and is melted Refining repeats deslagging and charging process, when copper face goes up to 100 mm~200 mm below slag-drip opening, stops fusion process.
(11)Spray gun is inserted into melt, sprays into fine coal, carries out oxygen-enriched air converting, ensures Control for Kiln Temperature 1200 DEG C~1250 DEG C, oxygen concentration is the % of 40 %~50, and the pressure that is blown into of oxygen is 170 kPa, obtained after blowing in blister copper 90 % of copper content with On.Blister copper and clinker are excluded from copper mouth and cinder notch respectively, and blister copper is cast into anode plate.
(12)The clinker overflowed from electric mantle heater passes through water quenching, and cement production plants or roadbed paving are sold to outside as waste With the black copper of precipitation, which is returned, to be continued to be smelted into blister copper into bottom convertor.
(13)When furnace lifting feeds intake again, 50 % of electric mantle heater slag is returned in side-blown bottom convertor again as rebasing furnace charge and Flux use, after start throw circuit board waste material carry out melting.
(14)It send copper anode plate to electrolysis system manufacture electrolysis copper products, digs out the earth of positive pole from electrolytic cell and send rare precious metal Recycle gold, silver and platinum group metal in workshop.
, can be with output 15.6t blister copper anode plates when handling 100 tons of circuit board waste materials in the present embodiment, cupric 92% is nickeliferous 0.02%, the 3.5g/t containing gold;Output Water Quenching Slag 35t, flue dust 50kg.Electrorefining output tough cathode 14.4t recycles the earth of positive pole 780kg。

Claims (3)

1. a kind of method that wiring board waste disposal utilizes, using circuit board waste material as raw material, this method includes Mechanical Crushing, fire Method melting and wet method electrolysis technique, which is characterized in that
(1)It is broken to circuit board waste material shredding machine or gyratory crusher, form 2 cm × 8 the cm~8 of cm × 2 of fragment granularity cm;
(2)Wiring board pieces of waste material, coal dust, electric furnace heat preservation clinker are melted in bilateral bottom convertor hereinafter referred to as bottom convertor Refining ensures that clinker slag type is stablized;Wherein, the organic components in circuit board waste material and potential energy substance, in high melt In the process, it is used as fuel;
Wiring board pieces of waste material is continuously added to the t/h of 5 t/h~50 into stove, pulverized coal consumption is input circuit board waste material The % of 12 %~25, coal dust are blown by furnace roof in stove, and circuit board waste material is put by feeding warehouse, complete at 1200 DEG C~1250 DEG C Full combustion decomposition;Clinker in electric furnace holding furnace is what bottom convertor slag-drip opening was released, and silicic acid is rich in the clinker of electric furnace holding furnace Salt and calcium oxide, as the rebasing clinker of bottom convertor when feeding intake again, to ensure that the clinker slag type of bottom convertor is stablized;
The content of copper, calcium oxide and silica in the clinker of periodic detection bottom convertor, add trapping agent, trapping agent additive amount with It keeps the clinker copper content of bottom convertor to be fully entered in acid bronze alloy less than 0.2 %, rare precious metal, keeps in the clinker of bottom convertor Calcium oxide 30 %~35 %, silica are standard in the % of 30 %~32;It is mended when calcium oxide component reduces in the clinker of bottom convertor Add calcium oxide;
When melting, burnt at 1100 DEG C~1400 DEG C of temperature, oxygen-rich concentration 20 %~70 %, 150~190 kPa of oxygen-enriched pressure Scorification is refined;When copper mouth blister copper grade copper is more than 90 %, clinker enters electric mantle heater;
(3)The flue-gas temperature that the reaction in bottom convertor generates is controlled, ensures to wave using including divulging information and provide enough spaces The organic matter completely burned of hair, while flue dust is recycled, prevent the generation of dioxin;
The bottom convertor, hearth area 4-15 m2, lower portion of furnace body is made of Copper Water Jacket, top molten iron set, air port position Flue is arranged with waste heat boiler integrated at the top of slag blanket, furnace body, and configures second-time burning air port;
Bottom convertor smoke and waste steam boiler sets two sections, is second-time burning flue, membrane wall radiation chamber at the top of furnace body respectively, by flue gas temperature Degree is down to 550 DEG C~680 DEG C from 1150 DEG C~1250 DEG C;
Chilling tower is arranged in bottom blowing kiln gas after waste heat boiler, is sprayed with water, by flue-gas temperature from 550 DEG C~680 DEG C 1.5 ± 200 DEG C are down in 0.5 second hereinafter, preventing dioxin from synthesizing again;
Activated carbon injection apparatus and pulsed jet cloth filter is arranged in bottom blowing kiln gas after chilling tower, and remaining dioxin is adsorbed It collects on the activated carbon and in bag filter, the flue dust of the % of 20 %~80, which returns, to be continued to mix spray with fresh activity charcoal Recycling is penetrated, remainder flue dust is as tin, the resource reutilization of lead, zinc;
Wet desulfurizer is arranged in the bottom blowing kiln gas after bag filter, removes the sulfur dioxide in flue gas, makes two Sulfur oxide emissions concentration is less than 150 mg/Nm3
Electrostatic precipitation demister is arranged after desulfurizing tower and carries out depth dedusting demisting for the bottom blowing kiln gas, thoroughly excludes acid Mist discharges and dustiness in the flue gas of discharge is made to be less than 15 mg/Nm3
(4)When the liquid level of melt is higher by than headwall slag-drip opening, stop that wiring board pieces of waste material is added, by the clinker of bottom convertor It is discharged into electric mantle heater and keeps the temperature, restore charging after deslagging and carry out melting, deslagging and charging process are repeated, until melt Liquid level goes up to below slag-drip opening when 100 mm~200 mm, stops fusion process;The clinker overflowed from electric mantle heater passes through water It quenches, as cement production plants or roadbed paving use is sold to outside waste, obtained black copper, which is returned, to be continued to be smelted into blister copper into bottom convertor;Institute Glass fiber component can be used as the slag former of melting in the circuit board waste material stated, and the water quenching of generation is discarded Copper in Slag and is less than 0.2 %;
(5)Clinker is kept the temperature in electric furnace, hearth layer when being next stove furnace lifting melting;When dispensing by 30 % of electric mantle heater clinker~ 50 % return to bottom convertor and are recycled as flux, while being incorporated trapping agent, and trapping agent additive amount is to keep the clinker of bottom convertor Copper content is less than 0.2 %, rare precious metal fully enters in acid bronze alloy, keeps 30 %~35 of calcium oxide in the clinker of bottom convertor %, silica are standard in the % of 30 %~32;Isolated black copper in electric furnace is returned and continues to be smelted into blister copper into bottom convertor;
(6)Spray gun is inserted into melt, sprays into fine coal, oxygen-enriched air converting is carried out, blister copper is obtained after blowing, blister copper is cast into anode plate; When blowing, ensure Control for Kiln Temperature at 1200 DEG C~1250 DEG C, oxygen concentration is the % of 40 %~50, and the pressure that is blown into of oxygen is 170±20 kPa;
(7)It send copper anode plate to electrolysis system manufacture electrolysis copper products, the earth of positive pole is dug out from electrolytic cell and send rare precious metal workshop Gold, silver and platinum group metal are recycled, is recycled rich in tin, lead, the flue dust of zinc and Waste Slag.
2. a kind of method that wiring board waste disposal utilizes according to claim 1, which is characterized in that step(1)In, institute It includes computer, mobile phone, television set, VCD machines, speaker, duplicator and the fax scrapped that the circuit board waste material stated, which derives from, The wiring board disassembled on machine product also includes the waste in electronic product machining manufacturing process.
3. a kind of method that wiring board waste disposal utilizes according to claim 1, which is characterized in that trapping agent additive amount For 5 %-15 % of circuit board waste material.
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