CN107475476A - A kind of method that copper-containing residue chlorination melting and reducing one-step method prepares the pig iron - Google Patents
A kind of method that copper-containing residue chlorination melting and reducing one-step method prepares the pig iron Download PDFInfo
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- CN107475476A CN107475476A CN201710504403.3A CN201710504403A CN107475476A CN 107475476 A CN107475476 A CN 107475476A CN 201710504403 A CN201710504403 A CN 201710504403A CN 107475476 A CN107475476 A CN 107475476A
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- 239000010949 copper Substances 0.000 title claims abstract description 83
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 78
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 46
- 229910000805 Pig iron Inorganic materials 0.000 title claims abstract description 22
- 238000005660 chlorination reaction Methods 0.000 title claims abstract description 19
- 238000002844 melting Methods 0.000 title claims abstract description 19
- 230000008018 melting Effects 0.000 title abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 85
- 229910052742 iron Inorganic materials 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 36
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 21
- 239000012320 chlorinating reagent Substances 0.000 claims abstract description 19
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- 238000006722 reduction reaction Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000004927 fusion Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000010792 warming Methods 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 3
- 239000003830 anthracite Substances 0.000 claims description 3
- 239000002802 bituminous coal Substances 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 239000000571 coke Substances 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000002956 ash Substances 0.000 abstract description 19
- 235000002918 Fraxinus excelsior Nutrition 0.000 abstract description 18
- 229910052751 metal Inorganic materials 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000009835 boiling Methods 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 229910001510 metal chloride Inorganic materials 0.000 abstract 1
- 238000003723 Smelting Methods 0.000 description 7
- 229910052840 fayalite Inorganic materials 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052681 coesite Inorganic materials 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 229910052906 cristobalite Inorganic materials 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910052682 stishovite Inorganic materials 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 235000019402 calcium peroxide Nutrition 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009867 copper metallurgy Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000003265 pulping liquor Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241001124569 Lycaenidae Species 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000014987 copper Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010187 selection method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0006—Making spongy iron or liquid steel, by direct processes obtaining iron or steel in a molten state
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/12—Making spongy iron or liquid steel, by direct processes in electric furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working 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
- C22B7/001—Dry processes
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working 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
- C22B7/04—Working-up slag
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The present invention relates to a kind of method that copper-containing residue chlorination melting and reducing one-step method prepares the pig iron, belong to metallurgical technology field.It is 40 ~ 100 mesh that copper-containing residue, chlorinating agent and carbonaceous reductant are ground into granularity respectively first, copper-containing residue, chlorinating agent and carbonaceous reductant are well mixed and obtain mixed material, continuously add binding agent and water carries out briquetting or pressure ball obtains lump material or spherical material, the addition of binding agent is mixed material quality 3% ~ 7%, and the addition of water is mixed material quality 5% ~ 8%；By obtained lump material or spherical dry materials, then react 3 ~ 15min at being 850 ~ 900 DEG C in temperature and carry out low temperature chlorination reaction, then proceed to be warming up to 1500 ~ 1550 DEG C of 15 ~ 30min of reaction, carry out high-temperature fusion reduction reaction, slag iron is kept completely separate rear furnace cooling and obtains the pig iron.This method takes into full account the existing forms of copper and ferroelectric metal oxide in copper ashes, using the difference of the properties such as metal chloride fusing point, boiling point and vapour pressure, selective chlorination volatilized metal copper under low temperature, and melting and reducing recovery iron under high temperature.
Description
Technical field
The present invention relates to a kind of method that copper-containing residue chlorination-melting and reducing one-step method prepares the pig iron, belong to metallurgical technology
Field.
Background technology
Copper ashes is caused industrial solid castoff in pyrometallurgic copper process, be in copper smelter molten state material upper strata through cold
But the glass phase formed.At present, more than 80% produced in world's copper yield using pyrometallurgical smelting, remaining 20% is given birth to using hydrometallurgy
Production.More than the 97% of China's copper yield is produced by pyrometallurgical smelting, and pyrometallurgical smelting is occupied an leading position, but pyrometallurgical smelting process produces
Substantial amounts of copper slag.2.2 t copper ashes can then be produced by often producing 1 t metallic coppers according to statistics, and China produces copper smelting slag every year
1000 ~ 15,000,000 t, copper ashes add up volume of cargo in storage more than 50,000,000 t.With China's copper metallurgy industry sustainable development, copper ashes yield by
Year is incremented by, and substantial amounts of copper smelting slag heap has slag field, has not only occupied soil but also has polluted environment.But copper metallurgy industrial production goes out
Copper ashes in containing a large amount of valuable metals such as Fe, Cu, Zn, Pb, Co and Ni, wherein copper highest content can reach 5% or so, poor
After change processing still more than 0.5%, iron content therein is basically stable at 40% or so, and significantly larger than smelts iron ore
29.1% average grade.Therefore, for the property of copper ashes, the technology for selecting copper ashes recycling rationally to utilize, copper is effectively reclaimed
Valuable metal in slag, so as to realize copper ashes recycling, there is double meaning economical and environmentally friendly to Copper making industry.
Iron is in copper smelting slag mainly with Fe2SiO4（Fayalite）And Fe3O4（Magnetic iron ore）Form exist, copper at present
The comprehensive utilization of metallurgical slag is paid close attention to by domestic and foreign scholars, in copper ashes reclaim enriched in metals iron research method mainly by
It is following two：
The first is：Oxidizing roasting-crushing-magnetic selection technique.Crushed after molten copper slag is cooled down first, then dispensing balling-up
Afterwards, then by copper ashes oxidizing roasting is carried out to it under non-melt reducing condition, made in copper ashes mainly with Fe2SiO4（Fayalite）
Iron is changed into Fe existing for form3O4（Magnetic iron ore）Form, then iron is enriched with and extracted through broken, magnetic separation again.Relevant document table
It is bright：By oxidizing roasting-crushing-magnetic selection method, although accumulation rate of the iron in slag in magnetic iron ore can be made to reach more than 85%,
But have the disadvantage that：（1）High temperature oxidation roasting again after molten copper slag is cooled down, does not make full use of molten copper slag itself
Latent heat, this process cause a large amount of wastes of heat；（2）Molten copper slag is rich by iron first by oxidizing roasting-crushing-magnetic selection
Then collection is put into blast furnace and carries out reduction iron production, whole technological process is excessively complicated, and cost is higher in magnetic iron ore.
It is for second：Direct fusing and reducing iron technique.It is similar with blast furnace ironmaking, in high temperature（1500 DEG C of ＞）Molten
Under state, by adding reducing agent, directly by Fe in copper ashes2SiO4（Fayalite）And Fe3O4（Magnetic iron ore）The iron of form is reduced to
Metallic iron, slag sluicing system enriching and recovering iron is realized in the molten state.The technological process is although relatively simple, has reached certain
Energy conservation and consumption reduction effects.But the molten iron copper content obtained after copper ashes melting and reducing to be present too high for the technique（Average copper content is 2%
Left and right）The shortcomings that, conventional method for making steel is very difficult to remove, and the method industrially mainly mixed using the qualified pig iron is reduced copper and contained
Amount.
The content of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides a kind of copper-containing residue chlorination-melting and reducing
The method that one-step method prepares the pig iron.This method takes into full account the existing forms of copper and ferroelectric metal oxide in copper ashes, utilizes metal
The difference of the properties such as chloride fusing point, boiling point and vapour pressure, selective chlorination volatilized metal copper under cryogenic, in high temperature
Under the conditions of melting and reducing recovery iron, the pig iron is prepared by one-step method；And significantly reduce obtained by the direct melting and reducing of copper ashes
The problem of molten iron copper content is too high, the effective recycling for iron resource in later copper ashes provide new method.The present invention by with
Lower technical scheme is realized.
A kind of method that copper-containing residue chlorination-melting and reducing one-step method prepares the pig iron, it is comprised the following steps that：
（1）It is 40 ~ 100 mesh that copper-containing residue, chlorinating agent and carbonaceous reductant are ground into granularity respectively first, and then cupric gives up
Slag, chlorinating agent and carbonaceous reductant are well mixed to obtain mixed material, and the wherein addition of chlorinating agent is copper-containing residue quality
10% ~ 30%, it is 1.1 ~ 1.9 to control the C/Fe mass ratioes of carbon and iron in copper-containing residue in carbonaceous reductant:1；Then proceed to add
Binding agent and water carry out briquetting or pressure ball obtains lump material or spherical material, and the addition of binding agent is mixed material quality 3%
~ 7%, the addition of water is mixed material quality 5% ~ 8%；
（2）By step（1）Obtained lump material or spherical dry materials, then temperature be 850 ~ 900 DEG C at reaction 3 ~
15min carries out low temperature chlorination reaction, then proceedes to be warming up to 1500 ~ 1550 DEG C of 15 ~ 30min of reaction, carries out high-temperature fusion reduction
Reaction, is kept completely separate rear furnace cooling by slag iron and obtains the pig iron.
The step（1）Middle chlorinating agent is sodium chloride, potassium chloride or calcium chloride.
The carbonaceous reductant is bituminous coal, anthracite or coke, and fixing carbon content in carbonaceous reductant is higher than 60wt%.
The low temperature chlorination reaction and high-temperature fusion reduction reaction are carried out in Efco-Northrup furnace.
Above-mentioned copper-containing residue includes following mass percent component：TFe35% ~ 45%, SiO225% ~ 35%, Al2O33% ~ 8%,
CaO2% ~ 5%, MgO2% ~ 5%, Cu0.5% ~ 1.5%, other 0.1% ~ 4%.
The beneficial effects of the invention are as follows：
（1）The present invention prepares the pig iron by one-step method, under cryogenic selective chlorination volatilized metal copper, under the high temperature conditions
Melting and reducing recovery iron Cu volatilization removal efficiency reaches more than 50%, finally gives grade containing Fe 90% or so, containing Cu 1wt% with
Under low copper and iron water.
（2）Present invention process flow is short, and equipment is simple, easy to operate, overcomes the direct melting and reducing institute of one-sided copper ashes
The shortcomings that molten iron copper content is too high is obtained, effective recovery that iron resource in copper ashes is realized with relatively low production cost is enriched with, and is had
Good economic benefit.
Brief description of the drawings
Fig. 1 is present invention process flow chart.
Embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
As shown in figure 1, the method that the copper-containing residue chlorination-melting and reducing one-step method prepares the pig iron, it is comprised the following steps that：
（1）First by copper-containing residue（Including following mass percent component：TFe41.96%, SiO229.54%, Al2O34.99%,
CaO4.75%, MgO2.41%, Cu0.69%, other 0.1% ~ 4%）, chlorinating agent（Sodium chloride）And carbonaceous reductant（Bituminous coal, carbonaceous is also
Carbon content is fixed in former agent and is higher than 60wt%）It is 40 ~ 100 mesh to be ground to granularity respectively, then by copper-containing residue, chlorinating agent and charcoal
Matter reducing agent is well mixed to obtain mixed material, and the wherein addition of chlorinating agent is the 20% of copper-containing residue quality, and control carbonaceous is also
The C/Fe mass ratioes of carbon and iron in copper-containing residue are 1.5 in former agent:1；Then proceed to add binding agent（Binding agent gives up for paper pulp
Liquid）Briquetting, which is carried out, with water obtains lump material（20 ~ 25mm of diameter, 20 ~ 30mm of height cylindrical block）, the addition of binding agent
Measure as mixed material quality 5%, the addition of water is mixed material quality 5%；
（2）By step（1）Obtained lump material is dried, and it is anti-that 3min progress low temperature chlorinations are reacted at being then 850 DEG C in temperature
Should, then proceed to be warming up to 1540 DEG C of reaction 25min, carry out high-temperature fusion reduction reaction, it is cold with stove after slag iron is kept completely separate
But the pig iron is obtained, wherein low temperature chlorination reaction and high-temperature fusion reduction reaction are carried out in Efco-Northrup furnace.
The molten iron ferrous grade obtained before uncolled is 89.85wt%, cupric 0.93wt%；Cu chlorination takes off in whole process
Except rate is 52.55%.
Embodiment 2
As shown in figure 1, the method that the copper-containing residue chlorination-melting and reducing one-step method prepares the pig iron, it is comprised the following steps that：
（1）First by copper-containing residue（Including following mass percent component：TFe45%, SiO225%, Al2O33%, CaO2%,
MgO5%, Cu1.5%, other 0.1% ~ 4%）, chlorinating agent（Potassium chloride）And carbonaceous reductant（Anthracite, it is fixed in carbonaceous reductant
Carbon content is higher than 60wt%）It is 40 ~ 100 mesh to be ground to granularity respectively, then mixes copper-containing residue, chlorinating agent and carbonaceous reductant
Close and uniformly obtain mixed material, wherein the addition of chlorinating agent is the 10% of copper-containing residue quality, control in carbonaceous reductant carbon with
The C/Fe mass ratioes of iron are 1.1 in copper-containing residue:1；Then proceed to add binding agent（Binding agent is spent pulping liquor）Carried out with water
Pressure ball obtains spherical material（20 ~ 25mm of diameter）, the addition of binding agent is mixed material quality 3%, and the addition of water is mixing
Quality of material 8%；
（2）By step（1）Obtained spherical dry materials, it is anti-that 10min progress low temperature chlorinations are reacted at being then 880 DEG C in temperature
Should, then proceed to be warming up to 1500 DEG C of reaction 15min, carry out high-temperature fusion reduction reaction, it is cold with stove after slag iron is kept completely separate
But the pig iron is obtained, wherein low temperature chlorination reaction and high-temperature fusion reduction reaction are carried out in Efco-Northrup furnace.
The molten iron ferrous grade obtained before uncolled is 91.42wt%, cupric 0.96wt%；Cu chlorination takes off in whole process
Except rate is 51.02%.
Embodiment 3
As shown in figure 1, the method that the copper-containing residue chlorination-melting and reducing one-step method prepares the pig iron, it is comprised the following steps that：
（1）First by copper-containing residue（Including following mass percent component：TFe35%, SiO235%, Al2O38%, CaO3%,
MgO4%, Cu0.5%, other 0.1% ~ 4%）, chlorinating agent（Calcium chloride）And carbonaceous reductant（Coke, fixed carbon in carbonaceous reductant
Content is higher than 60wt%）It is 40 ~ 100 mesh to be ground to granularity respectively, then mixes copper-containing residue, chlorinating agent and carbonaceous reductant
Mixed material is uniformly obtained, the wherein addition of chlorinating agent is the 30% of copper-containing residue quality, and carbon is with containing in control carbonaceous reductant
The C/Fe mass ratioes of iron are 1.9 in copper waste residue:1；Then proceed to add binding agent（Binding agent is spent pulping liquor）Pressed with water
Ball obtains spherical material（20 ~ 25mm of diameter）, the addition of binding agent is mixed material quality 7%, and the addition of water is mixture
Expect quality 6%；
（2）By step（1）Obtained spherical dry materials, it is anti-that 15min progress low temperature chlorinations are reacted at being then 900 DEG C in temperature
Should, then proceed to be warming up to 1550 DEG C of reaction 30min, carry out high-temperature fusion reduction reaction, it is cold with stove after slag iron is kept completely separate
But the pig iron is obtained, wherein low temperature chlorination reaction and high-temperature fusion reduction reaction are carried out in Efco-Northrup furnace.
The molten iron ferrous grade obtained before uncolled is 90.39wt%, cupric 0.83wt%；Cu chlorination takes off in whole process
Except rate is 57.65%.
Above in association with accompanying drawing to the present invention embodiment be explained in detail, but the present invention be not limited to it is above-mentioned
Embodiment, can also be before present inventive concept not be departed from those of ordinary skill in the art's possessed knowledge
Put that various changes can be made.
Claims (4)
1. a kind of method that copper-containing residue chlorination-melting and reducing one-step method prepares the pig iron, it is characterised in that comprise the following steps that：
（1）It is 40 ~ 100 mesh that copper-containing residue, chlorinating agent and carbonaceous reductant are ground into granularity respectively first, and then cupric gives up
Slag, chlorinating agent and carbonaceous reductant are well mixed to obtain mixed material, and the wherein addition of chlorinating agent is copper-containing residue quality
10% ~ 30%, it is 1.1 ~ 1.9 to control the C/Fe mass ratioes of carbon and iron in copper-containing residue in carbonaceous reductant:1；Then proceed to add
Binding agent and water carry out briquetting or pressure ball obtains lump material or spherical material, and the addition of binding agent is mixed material quality 3%
~ 7%, the addition of water is mixed material quality 5% ~ 8%；
（2）By step（1）Obtained lump material or spherical dry materials, then temperature be 850 ~ 900 DEG C at reaction 3 ~
15min carries out low temperature chlorination reaction, then proceedes to be warming up to 1500 ~ 1550 DEG C of 15 ~ 30min of reaction, carries out high-temperature fusion reduction
Reaction, is kept completely separate rear furnace cooling by slag iron and obtains the pig iron.
2. the method that copper-containing residue chlorination-melting and reducing one-step method according to claim 1 prepares the pig iron, its feature exist
In：The step（1）Middle chlorinating agent is sodium chloride, potassium chloride or calcium chloride.
3. the method that copper-containing residue chlorination-melting and reducing one-step method according to claim 1 prepares the pig iron, its feature exist
In：The carbonaceous reductant is bituminous coal, anthracite or coke, and fixing carbon content in carbonaceous reductant is higher than 60wt%.
4. the method that copper-containing residue chlorination-melting and reducing one-step method according to claim 1 prepares the pig iron, its feature exist
In：The low temperature chlorination reaction and high-temperature fusion reduction reaction are carried out in Efco-Northrup furnace.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792857A (en) * | 2010-04-13 | 2010-08-04 | 李柏荣 | Process for refining metals from minerals |
| CN102417991A (en) * | 2011-11-25 | 2012-04-18 | 昆明理工大学 | Method for recycling copper and preparing qualified molten iron by carrying out smelting, oxidation and chlorination-reduction on copper slag |
| CN106480325A (en) * | 2016-10-28 | 2017-03-08 | 江苏省冶金设计院有限公司 | Process system and its application in processing copper ashes of copper ashes |
-
2017
- 2017-06-28 CN CN201710504403.3A patent/CN107475476A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792857A (en) * | 2010-04-13 | 2010-08-04 | 李柏荣 | Process for refining metals from minerals |
| CN102417991A (en) * | 2011-11-25 | 2012-04-18 | 昆明理工大学 | Method for recycling copper and preparing qualified molten iron by carrying out smelting, oxidation and chlorination-reduction on copper slag |
| CN106480325A (en) * | 2016-10-28 | 2017-03-08 | 江苏省冶金设计院有限公司 | Process system and its application in processing copper ashes of copper ashes |
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