CN106399699A

CN106399699A - Process for treating sludge with copper import

Info

Publication number: CN106399699A
Application number: CN201611178461.3A
Authority: CN
Inventors: 罗忠平; 杨文�
Original assignee: Zhejiang Rich Metallurgical Group Co Ltd
Current assignee: Zhejiang Rich Metallurgical Group Co Ltd
Priority date: 2016-12-19
Filing date: 2016-12-19
Publication date: 2017-02-15
Anticipated expiration: 2036-12-19
Also published as: CN106399699B

Abstract

The process for treating sludge with copper import, disposes collaboratively the combined technology of copper smelting process and sludge with copper import fire disposal, including classification of copper sludge with different variety imports according to more than 2% and less than 2% sulfur standards, then treats by adopting varying means; the process carries out resource utilization of the vast majority sulfur in original materials in the production of sulfuric acid, reduces effectively flue gas SO2 pollution to environment, and improves significantly the recovery rate of valuable metals such as copper, reduce consumption of energy resources.

Description

A kind of handling process of copper-contained sludge

Technical field

The present invention relates to environmental protection and recycling field, particularly a kind of handling process of copper-contained sludge.

Background technology

Copper-contained sludge occurs mainly with the surface treatment of metal key industry, heat treatment process, electronic components fabrication, plating And basic chemical feedstock such as manufactures at the mud producing in industry wastewater treatment process, the mud that these contain heavy metal has easily long-pending Tired, unstable, the features such as be easy to run off, if do not dealt carefully with, serious environmental pollution can be caused.

Although these copper-contained sludges belong to hazardous industry solid waste, mud drying process after cupric grade 3% Between～18%, wherein also contain that nickel, zinc, selenium, tellurium, palladium, gold, silver etc. are dilute expensive and non-ferrous metal (copper-contained sludge primary chemical becomes Divide and be shown in Table 1), and on the earth, the mining grade of copper mine only has more than 0.4%, therefore, exhausts and resource from slowing down copper resource From the point of view of recycling, many metals hazardous industry solid waste such as cupric belongs to the metals resources that can develop.

Table 1 copper-contained sludge main chemical compositions

Element

Cu

S

Fe

SiO₂

CaO

Na

Zn

Ni

Other

Content (%)

3～18

0.5～8.5

22

24

8

2

2.5

0.5

~

Disposing technique for copper-contained sludge is more, and conventional method of disposal mainly has security landfill, wet method to dispose and fire Three kinds of disposing techniques such as method disposal, wherein：Security landfill method not only land occupation, causes the waste of resource, returns offspring and stays The hidden danger of huge environmental pollution；Wet method disposing technique needs to dispose using different wet methods for different dangerous solid waste kinds Flow process is it is difficult to accomplish to concentrate the cooperative disposal of " in high volume, multi items ", and the waste water of production process generation, waste residue still fall within danger Dangerous waste, do not reach " pollution treatment do not produce dirt, profit useless do not produce useless " innoxious effect；Pyrogenic process disposing technique is had ready conditions different product Kind copper-contained sludge concentrate and carry out high-volume and dispose, and have and produce the short benefit of harmless slag, flow process, therefore, pyrogenic process is disposed Technique is the main flow disposing technique for many metals hazardous industry solid waste such as cupric.

At present, pyrogenic process disposing technique is all to pass through to dry brickmaking reduction melting refining etc. and dispose to flow by copper-contained sludge Journey produces copper anode plate (see figure 1).Wherein：Baking operation is mainly by the moisture content of many for cupric etc. metal sludges from 75% Left and right is dried to 40% about by rotary kiln or sintering machine, and fuel made by drying course natural gas or coal；In order to ensure melting In-furnace temperature, increases the gas permeability of furnace charge, improves its specific capacity, must allocate the cupric many metal sludges after drying after lime stone into Deliver to and in special brickmaking machine, be pressed into the brick material with some strength and granularity, as the furnace charge of smelting furnace；To make The material of brick and quartz flux and the reduction material such as coking coal send in smelting furnace after dispensing and carry out reduction melting, in high temperature action Down by a series of reduction reactions, it is higher and be enriched with that gold, silver, palladium, nickel etc. is dilute expensive and secondary blister copper of non-ferrous metal to generate sulfur-bearing, product The secondary blister copper cupric 82% about going out, the SiO in the FeO producing in reduction process and furnace charge₂And the slag making material such as CaO forms stove Slag, slag cupric 0.6% about, copper and slag, due to not being mutually dissolved and proportion differs larger, pass through clarification in smelting furnace Discharge respectively after separating；Then by the thick composition brass of high-grade of the secondary blister copper of output cupric 82% about and outsourcing cupric more than 92% It is added to after dispensing and carries out pyro-refining after melting in anode furnace, finally obtain enrichment gold, silver, selenium, tellurium, palladium, nickel etc. dilute expensive And the copper anode plate of non-ferrous metal.

Although existing pyrogenic process disposing technique has to concentrate different dangerous solid waste kinds carrying out in high volume disposing, produce harmless The short advantage of slag, flow process, but there is also following 3 problems：

1) flue gas SO₂Discharge capacity is high：In cupric many metals hazardous industry solid waste of different cultivars, the content of S is typically 0.5 Between～8.5%, these sulphur can be with SO in reduction melting and pyro-refining course of reaction₂Form emit, due to cigarette Gas SO₂Concentration less than 3% it is impossible to carry out relieving haperacidity, even if after being processed by flue gas desulfurization can qualified discharge, total emission volumn is still Very high, the sulphur in raw material not only cannot function as resource and uses, and also causes pollution to environment.

2) high energy consumption：Copper-contained sludge will consume substantial amounts of fuel, energy during drying, reduction melting and pyro-refining Consumption is very high.

3) recovery rate of valuable metals is low：The slag cupric of environment-friendly stove reduction melting output up to 0.6% about, and on the earth Copper Ores containing copper grade more than 0.4% just have extraction value, and the waste of cupric 0.6% causes the waste of resource.

Content of the invention

A kind of handling process of the copper-contained sludge providing for the deficiencies in the prior art, the present invention, is by ore deposit Copper making work Skill is combined with the pyrogenic process disposing technique of copper-contained sludge, works in coordination with the technology of Treatment of Copper mud together；This technique is not only Most sulphur in raw material can be carried out recycling and produce sulfuric acid, effectively mitigate flue gas SO₂Pollution to environment moreover it is possible to Significantly improve the rate of recovery of the valuable metals such as copper, reduce energy resource consumption.

For realizing the purpose of the present invention, the present invention takes following technical scheme：

A kind of handling process of copper-contained sludge is it is characterised in that dispose work by the pyrogenic process of ore deposit Copper making technique and copper-contained sludge Skill combines cooperative disposal, carries out point by the standard of sulfur-bearing >=2% and sulfur-bearing ＜ 2% including by the copper-contained sludge of different cultivars Class, then be respectively adopted different modes and processed：

The copper-contained sludge handling process of sulfur-bearing ＜ 2% comprises the steps：

1) copper-contained sludge of sulfur-bearing ＜ 2% carries out low temperature drying with dryer；

2) copper-contained sludge after drying is allocated into after lime stone, deliver to and in brickmaking machine, be pressed into square brick, natural drying one week Standby afterwards；

3) square brick making is added to side blowing smelting furnace together with quartz sludging flux and reduction coking coal material In, by a series of reduction reactions under high temperature action, generation sulfur-bearing is higher and enrichment gold, silver, palladium, nickel etc. are dilute expensive and have coloured gold The secondary blister copper belonging to；

4) the secondary blister copper of output is added to the blowing operation of ore deposit copper metallurgy industry, using the richness bessemerizing course of reaction Waste heat amount carries out the process of low cost, after the liquid blister copper of output cupric more than 98.5%, is sent to follow-up anode furnace with copper-clad Carry out pyro-refining；Sulphur in secondary blister copper generates SO₂It is sent to flue gas acid preparing system output sulphur with flue gas after waste heat recovery Acid is outer to sell；

5) smelting slag of side blowing smelting furnace output cupric 0.6% about is sent to the slag beneficiating process of ore deposit copper metallurgy industry Carry out synthetical recovery, the slag concentrate of output cupric 22% about returns ore deposit copper metallurgy industry and processes, and remaining cupric is below 0.20% Flotation tailings outside sell to cement building material factory as raw material；

The copper-contained sludge handling process of sulfur-bearing >=2% comprises the steps：

1) copper-contained sludge of sulfur-bearing >=2% carries out low temperature drying with dryer；

2) copper-contained sludge after drying, after the discharging opening of low temp dryer ejects, delivers to double rod Squeezinggranulators, system Become graininess copper-contained sludge；

3) granular copper-contained sludge is sent to band drier to be dried；

4) graininess copper-contained sludge after drying is sent to the concentrate storehouse of ore deposit copper metallurgy industry, with copper concentrate, slag concentrate, stone It is added in smelting furnace after diamond stone sludging flux dispensing, aoxidize and make sulfonium reaction through a series of, the sulphur in copper-contained sludge generates SO₂It is sent to after waste heat recovery outside flue gas acid preparing system output sulfuric acid with flue gas and sell；Copper in copper-contained sludge generates copper matte regulus Be sent to follow-up converter procedure, by bessemerize reaction output blister copper, the oxidation in smelting furnace and make sulfonium reaction belong to heat release Reaction, it is not necessary to consume other fuel in addition to a small amount of coke powder changing slag；The smelting slag generating is sent to slag beneficiating process and enters Row synthetical recovery.

Preferably, the step 1 of the copper-contained sludge handling process of described sulfur-bearing ＜ 2%) and the cupric of sulfur-bearing >=2% dirty Step 1 in sludge treatment technology) all dried using oar blade type or disc type dryer so that copper-contained sludge moisture content from 75% about drops to 40% about.

Preferably, the step 1 of the copper-contained sludge handling process of described sulfur-bearing ＜ 2%) and the cupric of sulfur-bearing >=2% dirty Step 1 in sludge treatment technology) used in oar blade type or disc type dryer all using pressure >=0.6MPa waste heat steam As thermal source, afterheat steam both from the smelting furnace of ore deposit copper metallurgy industry and bessemerizes operation subsequent high temperature fume afterheat to vapour Reclaim the steam of output.

Preferably, the step 2 of the copper-contained sludge handling process of described sulfur-bearing ＜ 2%) in lime stone dosage weight For copper-contained sludge dry weight 4～6%.

Preferably, the step 2 of the copper-contained sludge handling process of described sulfur-bearing ＜ 2%) in the size of compacting square brick be 140×120×120mm.

Preferably, the step 3 of the copper-contained sludge handling process of described sulfur-bearing ＜ 2%) in quartz sludging flux Weight is added to add the 6～8% of weight for square brick, the addition weight of reduction coking coal adds the 11～14% of weight amount for square brick.

Preferably, a kind of handling process of described copper-contained sludge is it is characterised in that the cupric of described sulfur-bearing >=2% is dirty Step 2 in sludge treatment technology) make the graininess copper-contained sludge of diameter 5～15mm.

Preferably, the step 3 in the copper-contained sludge handling process of described sulfur-bearing >=2%) make the moisture content of copper-contained sludge Drop to less than 10% from 40% about.

Preferably, the step 3 in the copper-contained sludge handling process of described sulfur-bearing >=2%) belt drying that used Machine adopts hot blast as thermal source, and hot blast is with the smelting furnace of ore deposit copper metallurgy industry and to bessemerize operation subsequent high temperature fume afterheat The afterheat steam reclaiming the pressure >=0.6MPa of output passes through heat exchanger heat exchange output.

Preferably, the step 4 in the copper-contained sludge handling process of described sulfur-bearing >=2%) in graininess copper-contained sludge, S/Cu pressed by copper concentrate, slag concentrate, quartz flux>1.25, output slag Fe/SiO₂Ratio requirement for 1.6～1.8 is joined Material.

The present invention is aiming at the existing flue gas SO existing containing many metals hazardous industry solid waste pyrogenic process disposal process such as copper₂ Discharge capacity height, high energy consumption, the low problem of recovery rate of valuable metals, there is provided a kind of fire by ore deposit Copper making technique and copper-contained sludge Method disposing technique combines the technology of cooperative disposal, and its technical characterstic has：

1) flue gas SO₂Discharge capacity is few

A kind for the treatment of technology containing many metals hazardous industry solid waste such as copper that the present invention provides, copper-contained sludge is pressed sulfur-bearing >=2% and sulfur-bearing ＜ 2% standard is classified, and sulfur-bearing >=2% copper-contained sludge is straight after low temperature drying, granulation, dried process Pick the side blowing smelting furnace toward ore deposit Copper making operation to be processed, the sulphur in copper-contained sludge generates SO₂With flue gas warp It is sent to flue gas acid preparing system output sulfuric acid after waste heat recovery；The copper-contained sludge of sulfur-bearing ＜ 2% is molten through low temperature drying, brickmaking, reduction After refining, the secondary blister copper of the high sulfur-bearing of output is added directly into the converter of ore deposit Copper making operation and is processed, and the sulphur in secondary blister copper also generates SO₂It is sent to flue gas acid preparing system output sulfuric acid with flue gas after waste heat recovery；Present invention process scheme makes in copper-contained sludge Most sulphur all achieve recycling and make sulfuric acid, compare existing pyrogenic process disposal process, flue gas SO₂Discharge capacity significantly Reduce.

2) energy consumption is low

Existing pyrogenic process disposal process adopts natural gas or pulverized coal friring as the thermal source of rotary kiln drying equipment, combustion air The thermal loss taken away is big, present invention process scheme be by the use of ore deposit Copper making operation residual neat recovering system output steam as containing Copper mud dries the thermal source of (or drying) equipment, does not have air to take away the loss of heat；

The copper-contained sludge of sulfur-bearing >=2% of the present invention is routed directly to ore deposit Copper making work after low temperature drying, granulation, dried process The side blowing smelting furnace of sequence is processed, the copper-contained sludge of sulfur-bearing ＜ 2% output after low temperature drying, brickmaking, reduction melting The converter procedure that the secondary blister copper of high sulfur-bearing is added directly into ore deposit Copper making operation is processed, and these processing procedures are all to utilize ore deposit The surplus heat of Copper making process chemistry reaction is processed it is not necessary to be consumed other fuel, effectively less energy resource consumption.

3) recovery rate of valuable metals is high

The slag cupric of existing pyrogenic process disposal process environment-friendly stove reduction melting output up to 0.6% about, and contain on the earth The Copper Ores of copper grade more than 0.4% just have extraction value, and the waste of cupric 0.6% causes the waste of resource；The present invention The slag ore-sorting system that the smelting slag of output is sent to ore deposit Copper making operation is processed, final flotation tailings cupric up to 0.20% with Under, the gold, silver taken away from slag, nickel etc. are dilute expensive and non-ferrous metal can also be reclaimed by slag ore dressing.

Brief description

Fig. 1 is the pyrogenic process disposing technique flow chart of existing copper-contained sludge；

Fig. 2 is the processing technological flow figure of copper-contained sludge of the present invention.

Specific embodiment

Below in conjunction with the accompanying drawings the present invention is described in further details.

Embodiment

The processing technological flow figure of copper-contained sludge as shown in Figure 2 is it would be desirable to by ore deposit Copper making technique and copper-contained sludge Pyrogenic process disposing technique combine cooperative disposal, including by the copper-contained sludge of different cultivars by sulfur-bearing >=2% and sulfur-bearing ＜ 2% Standard classified, then be respectively adopted different modes and processed：

For the copper-contained sludge processing mode of sulfur-bearing ＜ 2%, comprise the steps：

1) copper-contained sludge of sulfur-bearing ＜ 2% carries out low temperature drying with oar blade type (or disc type) dryer, and how golden cupric etc. is The moisture content belonging to mud drops to 40% about from 75% about；The oar blade type being used or disc type dryer all using pressure >= The afterheat steam of 0.6MPa as thermal source, both from the smelting furnace of ore deposit copper metallurgy industry and bessemerize after operation by afterheat steam The steam of continuous high-temperature flue gas waste heat recovery output.

2) copper-contained sludge after drying is allocated into deliver to after lime stone in special brickmaking machine and be pressed into some strength Size with granularity is 140 × 120 × 120mm brick material, and as the furnace charge of reducing and smelting furnace, the dosage weight of lime stone is The 4～6% of copper-contained sludge dry measure weight；

3) by side blowing smelting furnace together with the materials such as the material of brick making and quartz, lime stone flux and reduction coking coal In, by a series of reduction reactions under high temperature action, generate sulfur-bearing higher and be enriched with gold, silver, selenium, tellurium, palladium, nickel etc. dilute expensive and The secondary blister copper of non-ferrous metal；The addition weight of quartz sludging flux adds the 6～8% of weight for square brick, reduces adding of coking coal Enter weight and add the 11～14% of weight for square brick.

4) the secondary blister copper of output is added directly into the converter of ore deposit Copper making operation, using the surplus heat bessemerizing reaction Carry out the process of low cost, the high-quality blister copper of output cupric more than 98.5%；Sulphur in secondary blister copper generates SO₂With flue gas It is sent to after waste heat recovery and sell outside flue gas acid preparing system output sulfuric acid；

5) smelting slag of side blowing smelting furnace reduction melting process output cupric 0.6% about is sent to ore deposit Copper making operation Slag ore-sorting system processed, final cupric sells to cement building material factory as raw material outside the flotation tailings below 0.25%.

For the copper-contained sludge processing mode of sulfur-bearing >=2%, comprise the steps

1) copper-contained sludge of sulfur-bearing >=2% carries out low temperature drying with oar blade type (or disc type) dryer, and how golden cupric etc. is The moisture content belonging to mud drops to 40% about from 75% about；The oar blade type being used or disc type dryer all using pressure >= The afterheat steam of 0.6MPa as thermal source, both from the smelting furnace of ore deposit copper metallurgy industry and bessemerize after operation by afterheat steam The steam of continuous high-temperature flue gas waste heat recovery output；2) copper-contained sludge after drying out is directly sent to pelletize from low temp dryer afterwards Machine, make diameter 5～15mm about graininess copper-contained sludge；

3) granular copper-contained sludge is sent to band drier to be dried, makes the moisture content of copper-contained sludge left from 40% The right side drops to less than 10%, and the band drier being used adopts hot blast as thermal source, and hot blast is the melting with ore deposit copper metallurgy industry The afterheat steam of stove and the pressure >=0.6MPa bessemerizing operation subsequent high temperature flue gas waste heat recovery output is changed by heat exchanger Hot output；

4) graininess copper-contained sludge after drying is sent to the concentrate storehouse of ore deposit copper metallurgy industry, with copper concentrate, slag concentrate, stone It is added in smelting furnace after diamond stone sludging flux dispensing, aoxidize and make sulfonium reaction through a series of, the sulphur in copper-contained sludge generates SO₂It is sent to after waste heat recovery outside flue gas acid preparing system output sulfuric acid with flue gas and sell；Copper in copper-contained sludge generates copper matte regulus Be sent to follow-up converter procedure, by bessemerize reaction output blister copper, the oxidation in smelting furnace and make sulfonium reaction belong to heat release Reaction, it is not necessary to consume other fuel in addition to a small amount of coke powder changing slag；The smelting slag generating is sent to slag beneficiating process and enters Row synthetical recovery；S/Cu pressed by graininess copper-contained sludge, copper concentrate, slag concentrate, quartz flux>1.25, output slag Fe/SiO₂ Proportioning for 1.6～1.8 carries out dispensing.

Because content according to the present invention is whole technological process this part, in embodiment, do not have specific injected volume, but It is to be clearly to those skilled in the art, another embodiment described above is only the side of being preferable to carry out to the present invention Formula is described, and not the spirit and scope of the present invention is defined, on the premise of without departing from design concept of the present invention, this Various modifications and improvement that in field, ordinary skill technical staff makes to technical scheme, all should fall into the present invention's Protection domain, the technology contents that the present invention is claimed, all record in detail in the claims.

Claims

1. a kind of handling process of copper-contained sludge is it is characterised in that pyrogenic process disposing technique by ore deposit Copper making technique and copper-contained sludge Combine cooperative disposal, carry out point by the standard of sulfur-bearing >=2% and sulfur-bearing ＜ 2% including by the copper-contained sludge of different cultivars Class, then be respectively adopted different modes and processed：

2) copper-contained sludge after drying is allocated into after lime stone, deliver to and in brickmaking machine, be pressed into square brick, natural drying standby in one week With；

3) square brick making is added in side blowing smelting furnace together with the material such as quartz sludging flux and reduction coking coal, By a series of reduction reactions under high temperature action, generation sulfur-bearing is higher and is enriched with the dilute expensive and non-ferrous metals such as gold, silver, palladium, nickel Secondary blister copper；

4) the secondary blister copper of output is added to the blowing operation of ore deposit copper metallurgy industry, using the heat more than needed bessemerizing course of reaction Amount carries out the process of low cost, after the liquid blister copper of output cupric more than 98.5%, is sent to follow-up anode furnace with copper-clad and carries out Pyro-refining；Sulphur in secondary blister copper generates SO₂It is sent to after waste heat recovery outside flue gas acid preparing system output sulfuric acid with flue gas Sell；

5) smelting slag of side blowing smelting furnace output cupric 0.6% about is sent to the slag beneficiating process of ore deposit copper metallurgy industry and carries out Synthetical recovery, the slag concentrate of output cupric 22% about returns ore deposit copper metallurgy industry and processes, and remaining cupric is floating below 0.20% Select and sell to cement building material factory outside tailings as raw material.

1) copper-contained sludge of sulfur-bearing >=2% carries out low temperature drying with dryer；；

2) copper-contained sludge after drying, after the discharging opening of low temp dryer ejects, delivers to double rod Squeezinggranulators, makes Granular copper-contained sludge；

3) granular copper-contained sludge is sent to band drier to be dried；

4) graininess copper-contained sludge after drying is sent to the concentrate storehouse of ore deposit copper metallurgy industry, with copper concentrate, slag concentrate, quartz It is added to after sludging flux dispensing in smelting furnace, aoxidize and make sulfonium reaction through a series of, the sulphur in copper-contained sludge generates SO₂With Flue gas is sent to together after waste heat recovery to be sold outside flue gas acid preparing system output sulfuric acid；After copper generation copper matte regulus in copper-contained sludge is sent to Continuous converter procedure, by bessemerize reaction output blister copper, the oxidation in smelting furnace and make sulfonium reaction belong to exothermic reaction, remove A small amount of coke powder changing slag outer it is not necessary to consume other fuel；The smelting slag generating is sent to slag beneficiating process and carries out synthesis Reclaim.

2. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that described sulfur-bearing ＜'s 2% contains The step 1 of copper sludge treatment technique) and the copper-contained sludge handling process of sulfur-bearing >=2% in step 1) all using oar blade type or circle Tray dryer machine carries out low temperature drying so that the moisture content of copper-contained sludge drops to 40% about from 75% about.

3. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that described sulfur-bearing ＜'s 2% contains The step 1 of copper sludge treatment technique) and the copper-contained sludge handling process of sulfur-bearing >=2% in step 1) oar blade type that used or Disc type dryer all using pressure >=0.6MPa afterheat steam as thermal source, afterheat steam is both from ore deposit copper metallurgy industry Smelting furnace and bessemerize the steam of operation subsequent high temperature flue gas waste heat recovery output.

4. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that described sulfur-bearing ＜'s 2% contains The step 2 of copper sludge treatment technique) in lime stone dosage weight be copper-contained sludge dry measure weight 4～6%.

5. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that described sulfur-bearing ＜'s 2% contains The step 2 of copper sludge treatment technique) in compacting square brick size be 140 × 120 × 120mm.

6. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that described sulfur-bearing ＜'s 2% contains The step 3 of copper sludge treatment technique) in quartz sludging flux addition weight be square brick add weight 6～8%, reduction is burnt The addition weight of coal adds the 11～14% of weight for square brick.

7. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that the cupric of described sulfur-bearing >=2% Step 2 in sludge treatment technique) make the graininess copper-contained sludge of diameter 5～15mm.

8. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that the cupric of described sulfur-bearing >=2% Step 3 in sludge treatment technique) make the moisture content of copper-contained sludge drop to less than 10% from 40% about.

9. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that containing of described sulfur-bearing >=2% Step 3 in copper sludge treatment technique) band drier that is used adopts hot blast as thermal source, and hot blast is with ore deposit Copper making system The afterheat steam of the smelting furnace of system and the pressure >=0.6MPa bessemerizing operation subsequent high temperature flue gas waste heat recovery output passes through Heat exchanger heat exchange output.

10. a kind of handling process of copper-contained sludge according to claim 1 is it is characterised in that described sulfur-bearing >=2% Step 4 in copper-contained sludge handling process) in graininess copper-contained sludge, copper concentrate, slag concentrate, quartz flux press S/Cu> 1.25, output slag Fe/SiO₂Proportioning for 1.6～1.8 carries out dispensing.