CN114438336A - Method for treating wet impurity-removing slag and copper-containing hazardous waste - Google Patents
Method for treating wet impurity-removing slag and copper-containing hazardous waste Download PDFInfo
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- CN114438336A CN114438336A CN202111661456.9A CN202111661456A CN114438336A CN 114438336 A CN114438336 A CN 114438336A CN 202111661456 A CN202111661456 A CN 202111661456A CN 114438336 A CN114438336 A CN 114438336A
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- 239000010949 copper Substances 0.000 title claims abstract description 115
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 89
- 239000002893 slag Substances 0.000 title claims abstract description 81
- 239000002920 hazardous waste Substances 0.000 title claims abstract description 21
- 238000003723 Smelting Methods 0.000 claims abstract description 70
- 239000002699 waste material Substances 0.000 claims abstract description 45
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 41
- 239000001301 oxygen Substances 0.000 claims abstract description 41
- 239000012535 impurity Substances 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 32
- 239000012141 concentrate Substances 0.000 claims abstract description 23
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000003830 anthracite Substances 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 235000019738 Limestone Nutrition 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000006028 limestone Substances 0.000 claims abstract description 12
- 239000010453 quartz Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000004575 stone Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000010793 electronic waste Substances 0.000 claims description 9
- 238000005266 casting Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- OBOXTJCIIVUZEN-UHFFFAOYSA-N [C].[O] Chemical compound [C].[O] OBOXTJCIIVUZEN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000006477 desulfuration reaction Methods 0.000 claims description 4
- 230000023556 desulfurization Effects 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 3
- 239000010813 municipal solid waste Substances 0.000 claims 4
- 239000002910 solid waste Substances 0.000 abstract description 12
- 238000004064 recycling Methods 0.000 abstract description 7
- 235000012239 silicon dioxide Nutrition 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000003009 desulfurizing effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 230000001698 pyrogenic effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-O sulfonium Chemical compound [SH3+] RWSOTUBLDIXVET-UHFFFAOYSA-O 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 235000008504 concentrate Nutrition 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000289 melt material Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011044 quartzite Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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Classifications
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- 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
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
- C22B15/003—Bath smelting or converting
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0054—Slag, slime, speiss, or dross treating
-
- 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
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0056—Scrap treating
-
- 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
- C22B7/002—Dry processes by treating with halogens, sulfur or compounds thereof; by carburising, by treating with hydrogen (hydriding)
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for treating wet impurity-removing slag and copper-containing hazardous waste, which comprises the following steps: respectively drying the wet impurity removal slag and HW22 copper-containing waste; uniformly mixing the dried wet-process impurity-removing slag, HW22 copper-containing waste, copper concentrate, limestone, quartz stone and anthracite to obtain a smelting mixture; and carrying out oxygen-enriched smelting on the smelting mixture, leading out the lower-layer material after smelting and layering, and cooling and recovering to obtain the matte ingot. The method carries out oxygen-enriched smelting on the wet impurity-removing slag and the HW22 copper-containing waste simultaneously, copper concentrate is introduced during the oxygen-enriched smelting, the wet impurity-removing slag and the HW22 copper-containing waste react with the copper concentrate at high temperature to generate copper matte and the copper matte is recovered in the form of copper matte ingots; the method realizes the comprehensive treatment of the two types of solid wastes, namely the wet impurity removal slag and the HW22 copper-containing waste, not only solves the problem that the wet impurity removal slag is difficult to recycle, but also obviously improves the comprehensive recycling rate of the solid wastes.
Description
Technical Field
The invention relates to the technical field of solid waste recycling, in particular to a method for treating wet impurity removal slag and copper-containing hazardous waste.
Background
With the continuous development of the electronic and information industries, the total amount of electronic waste materials is increased in an expansion mode, and electronic waste materials not only contain a large amount of valuable metals such as copper, tin, iron, aluminum and other precious metals, but also contain a large amount of materials such as plastics, resins, ceramics and the like, so that the electronic waste materials have high resource recycling value, and particularly, printed circuit boards, serving as basic products of the electronic industry, are indispensable components of various electronic products.
At present, smelting treatment processes of electronic wastes are mainly divided into a pyrogenic process and a wet process. The pyrometallurgical treatment process is that a high-temperature smelting furnace is utilized to heat and melt materials, through a series of high-temperature chemical reactions, valuable metals enter an alloy/sulfonium phase in the form of metal alloy or sulfonium, and impurities enter furnace slag in the form of oxides; wherein the recovered precious metals are mainly concentrated in the alloy/matte phase. Compared with the pyrogenic process, the wet process has poor adaptability to raw materials, the electronic waste capable of being mixed is limited, the stability of the product is poor, and secondary pollution is easily caused. Taking the impurity removal slag generated in the process of treating the electronic waste by the wet process as an example, the main component of the impurity removal slag by the wet process is CuS which is extremely insoluble and has larger moisture, so that the impurity removal slag is difficult to comprehensively recover and treat with other solid wastes, and the copper element in the impurity removal slag by the wet process is difficult to recycle. It is therefore desirable to provide a new process for solving the above-mentioned existing problems.
Disclosure of Invention
The invention aims to provide a method for treating wet-process impurity-removing slag and copper-containing hazardous waste, which is used for solving the problem that CuS in the wet-process impurity-removing slag is difficult to comprehensively recover and treat with other solid waste.
In order to solve the technical problems, the invention provides a method for treating wet impurity removal slag and copper-containing hazardous waste, which comprises the following steps: respectively drying the wet impurity removal slag and HW22 copper-containing waste; uniformly mixing the dried wet-process impurity-removing slag, HW22 copper-containing waste, copper concentrate, limestone, quartz stone and anthracite to obtain a smelting mixture; and carrying out oxygen-enriched smelting on the smelting mixture, leading out the lower-layer material after smelting and layering, and cooling and recovering to obtain the matte ingot.
Preferably, the specific steps of drying the wet-process impurity-removing slag and the HW22 copper-containing waste respectively are as follows: drying the wet impurity removal slag until the mass of water in the wet impurity removal slag is 15-25% of the mass of the initial wet impurity removal slag; the HW22 copper-containing waste is dried until the mass of moisture in the HW22 copper-containing waste is 30-50% of the mass of the initial HW22 copper-containing waste.
Preferably, the smelting mixture comprises the following raw materials in parts by weight: 5-20 parts of impurity-removing slag by a dry wet method, 20-40 parts of HW22 copper-containing waste after drying, 15-30 parts of copper concentrate, 0.1-5 parts of limestone, 0.1-5 parts of quartz and 15-35 parts of anthracite.
Preferably, the copper content of the copper concentrate is 24-60%.
Preferably, the wet impurity removal slag is impurity removal slag generated in the process of treating the electronic waste by a wet process, and the components of the impurity removal slag comprise CuS.
Preferably, in the oxygen-enriched smelting process, the smelting temperature is 1250-1350 ℃, and the smelting time is 1.5-3 h.
Preferably, in the oxygen-enriched smelting process, the oxygen concentration in the oxygen-enriched air is 50-75%, the oxygen-carbon ratio is 2.0-2.4, and the oxygen-carbon ratio is the ratio of the oxygen volume to the mass of carbon in the anthracite.
Preferably, oxygen-enriched smelting is carried out on the smelting mixture in an oxygen-enriched side-blown smelting pool, and after smelting and layering, the lower-layer material is led out to a steel casting mold for water-cooling ingot casting to obtain the matte ingot.
Preferably, the smelting mixture is subjected to oxygen-enriched smelting in an oxygen-enriched side-blown smelting pool, gas generated in the smelting process is sequentially guided to a tempering tower and a desulfurizing tower, and tail gas is discharged after desulfurization.
Preferably, the mass percentage of the metallic copper in the matte ingot is more than 50%.
The invention has the beneficial effects that: different from the situation of the prior art, the invention provides a method for treating wet-process impurity-removing slag and copper-containing hazardous waste, oxygen-enriched smelting is carried out on the wet-process impurity-removing slag and HW22 copper-containing waste at the same time, copper concentrate is introduced, the wet-process impurity-removing slag and the HW22 copper-containing waste react with the copper concentrate at high temperature to generate copper matte, and the copper matte is recovered in the form of copper matte ingots; the method realizes the comprehensive treatment of the two types of solid wastes, namely the wet impurity removal slag and the HW22 copper-containing waste, not only solves the problem that the wet impurity removal slag is difficult to recycle, but also obviously improves the comprehensive recycling rate of the solid wastes.
Drawings
FIG. 1 is a process flow diagram of an embodiment of the method for treating wet process impurity-removing slag and copper-containing hazardous waste.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, the present invention provides a method for treating wet process impurity removal slag and copper-containing hazardous waste, comprising the following steps:
s1, drying the wet impurity removal slag and HW22 copper-containing waste respectively. In the step, the wet-method impurity-removing slag is dried until the mass of water in the wet-method impurity-removing slag is 15-25% of the mass of the initial wet-method impurity-removing slag; the HW22 copper-containing waste is dried until the mass of the water in the HW22 copper-containing waste is 30-50% of that of the HW22 copper-containing waste, and the wet impurity removal slag and the HW22 copper-containing waste contain more water, so that the drying is needed in advance, and the subsequent material mixing and oxygen-enriched smelting are facilitated.
S2, uniformly mixing the dried wet-method impurity-removing slag and HW22 copper-containing waste with copper concentrate, limestone, quartzite and anthracite to obtain a smelting mixture. In the step, the smelting mixture comprises the following raw materials in parts by mass: 5-20 parts of impurity-removing slag by a dry wet method, 20-40 parts of HW22 copper-containing waste after drying, 15-30 parts of copper concentrate, 0.1-5 parts of limestone, 0.1-5 parts of quartz and 15-35 parts of anthracite. Wherein the copper content in the copper concentrate is 24-60%; the wet impurity removal slag is impurity removal slag generated in the process of treating electronic waste by a wet process, and comprises the components of CuS; the HW22 copper-containing waste is copper-containing sludge generated in the non-ferrous metal smelting or electronic component manufacturing process, the components of the copper-containing sludge mainly comprise copper sulfate, ferric sulfate and the like, the copper-containing sludge has high leaching toxicity and can provide iron components.
And S3, carrying out oxygen-enriched smelting on the smelting mixture, guiding out lower-layer materials after smelting and layering, cooling and recycling to obtain the matte ingot. In the step, the smelting mixture is subjected to oxygen-enriched smelting in an oxygen-enriched side-blown smelting pool, and after smelting and layering, a lower layer material is led out to a steel casting die for water-cooling ingot casting to obtain a matte ingot, wherein the mass percentage of metal copper in the matte ingot is more than 90%; the smelting temperature is 1250-1350 ℃, the oxygen-enriched smelting time is 1.5-3 h, the oxygen concentration in the oxygen-enriched air is 50-75%, the oxygen-carbon ratio is 2.0-2.4, and the ratio of the oxygen volume to the mass of carbon in the anthracite is specifically required to be controlled.
The mechanism of the invention is that the wet impurity-removing slag and the HW22 copper-containing waste are simultaneously subjected to oxygen-enriched smelting, copper concentrate is introduced during the oxygen-enriched smelting, and CuS and HW22 copper-containing waste of the wet impurity-removing slag react with the copper concentrate at high temperature to generate copper matte and SO2The formed matte is recovered in the form of a matte ingot by cooling the ingot, while the formed SO is2Sequentially guiding the mixture to a tempering tower and a desulfurizing tower, and discharging tail gas after desulfurization; the method realizes the comprehensive treatment of the two types of solid wastes, namely the wet impurity removal slag and the HW22 copper-containing waste, not only solves the problem that the wet impurity removal slag is difficult to recycle, but also obviously improves the comprehensive recycling rate of the solid wastes.
The treatment effect of the method for treating the wet-process impurity-removing slag and the copper-containing hazardous waste is analyzed through specific examples and comparative examples.
Copper concentrate, quartz stone, limestone and anthracite with the same chemical composition are adopted in the following examples, and specifically, the copper content in the copper concentrate is 45%; the content of silicon dioxide in the quartz stone is 85.86 percent, and the water content is 0.75 percent; the limestone contains 51.69% of calcium oxide, 2.47% of silicon dioxide and 0.19% of water; in percentage by mass, the anthracite has a fixed carbon content of 81.18%, an ash content of 11.27%, a volatile component of 6.82% and a sulfur content of 0.5%. In the following examples, the same chemical composition of wet desmutting slag and HW22 copper-containing waste was used, the chemical composition of the wet desmutting slag is shown in table 1 and the chemical composition of HW22 copper-containing waste is shown in table 2, and the wet desmutting slag was dried from an initial moisture content of 40% to a moisture content of 20.64% and the HW22 copper-containing waste was dried from an initial moisture content of 75% to a moisture content of 40.5%.
TABLE 1
TABLE 2
Example 1
The steps of the smelting treatment of the waste circuit board in the embodiment are as follows:
(1) 8.33 percent of dry wet-process impurity-removing slag, 33.33 percent of dry HW22 copper-containing waste, 25 percent of copper concentrate, 2.5 percent of limestone, 1.67 percent of quartz stone and 29.17 percent of anthracite are uniformly mixed by mass percent to obtain a smelting mixture.
(3) And (2) carrying out oxygen-enriched smelting on the smelting mixture in an oxygen-enriched side-blown smelting pool at 1250 ℃, wherein the oxygen-enriched smelting time is 2 hours, the oxygen concentration in oxygen-enriched air is 60%, and the molar ratio of oxygen to carbon is 2, and after smelting and layering, guiding the lower-layer material onto a steel casting die for water-cooling ingot casting to obtain the ice copper ingot.
Example 2
The present embodiment is based on the processing steps of embodiment 1, and the difference is that the mixture ratio of each raw material in the smelting mixture is different, specifically, the mixture ratio of each raw material in the smelting mixture in the present embodiment is: 13.90% dry wet desmutting, 27.03% dry HW22 copper-containing waste, 28.57% copper concentrate, 2.32% limestone, 1.93% quartz and 26.25% anthracite, with the other process steps and parameters consistent with example 1.
Example 3
The present embodiment is based on the processing steps of embodiment 1, and the difference is that the mixture ratio of each raw material in the smelting mixture is different, specifically, the mixture ratio of each raw material in the smelting mixture in the present embodiment is: 18.75% dry wet desmutting, 35.16% dry HW22 copper-containing waste, 15.63% copper concentrate, 3.13% limestone, 1.56% quartz and 25.78% anthracite, with other process steps and parameters consistent with example 1.
The composition analysis was performed on the matte ingots obtained after the treatment in examples 1 to 3, and the corresponding recovery rates were counted, with the results shown in table 3. As can be seen from the data in table 3, the content of Cu in the matte ingots prepared in examples 1 to 3 is within the range of 55 to 75%, and both the content of Cu and the recovery rate of Cu reach over 50%, and over 99%, so that it is proved that the method for treating wet-process miscellaneous slag and hazardous copper-containing waste can well recover the Cu in the wet-process miscellaneous slag and the HW22 copper-containing waste, solve the problem that the CuS in the wet-process miscellaneous slag is difficult to recycle, and realize the comprehensive recovery of two solid wastes.
TABLE 3
Different from the situation of the prior art, the invention provides a method for treating wet-process impurity-removing slag and copper-containing hazardous waste, oxygen-enriched smelting is carried out on the wet-process impurity-removing slag and HW22 copper-containing waste at the same time, copper concentrate is introduced, the wet-process impurity-removing slag and the HW22 copper-containing waste react with the copper concentrate at high temperature to generate copper matte, and the copper matte is recovered in the form of copper matte ingots; the method realizes the comprehensive treatment of the two types of solid wastes, namely the wet impurity removal slag and the HW22 copper-containing waste, not only solves the problem that the wet impurity removal slag is difficult to recycle, but also obviously improves the comprehensive recycling rate of the solid wastes.
It should be noted that the above embodiments belong to the same inventive concept, and the description of each embodiment has a different emphasis, and reference may be made to the description in other embodiments where the description in individual embodiments is not detailed.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for treating wet impurity-removing slag and copper-containing hazardous waste is characterized by comprising the following steps:
respectively drying the wet impurity removal slag and HW22 copper-containing waste;
uniformly mixing the dried wet-process impurity-removing slag, HW22 copper-containing waste, copper concentrate, limestone, quartz stone and anthracite to obtain a smelting mixture;
and carrying out oxygen-enriched smelting on the smelting mixture, leading out lower-layer materials after smelting and layering, and cooling and recovering to obtain the matte ingot.
2. The method for treating wet process impurity removal slag and hazardous waste containing copper according to claim 1, wherein the specific steps of drying the wet process impurity removal slag and the HW22 copper-containing waste respectively are as follows:
drying the wet impurity removal slag until the mass of water in the wet impurity removal slag is 15-25% of the mass of the initial wet impurity removal slag;
the HW22 copper-containing waste is dried until the mass of moisture in the HW22 copper-containing waste is 30-50% of the mass of the initial HW22 copper-containing waste.
3. The method for treating the wet-process impurity-removing slag and the copper-containing hazardous waste according to claim 1, wherein the smelting mixture comprises the following raw materials in parts by mass:
5-20 parts of impurity-removing slag by a dry wet method, 20-40 parts of HW22 copper-containing waste after drying, 15-30 parts of copper concentrate, 0.1-5 parts of limestone, 0.1-5 parts of quartz and 15-35 parts of anthracite.
4. The method for treating the wet process impurity removal slag and the copper-containing hazardous waste according to claim 1, wherein the copper content in the copper concentrate is 24-60%.
5. The method for treating wet process trash slag and copper-containing hazardous waste according to claim 1, wherein the wet process trash slag is trash slag generated in the process of treating electronic waste by a wet process, and the trash slag comprises CuS.
6. The method for treating the wet impurity removal slag and the copper-containing hazardous waste according to claim 1, wherein in the oxygen-enriched smelting process, the smelting temperature is 1250-1350 ℃, and the smelting time is 1.5-3 h.
7. The method for treating wet process impurity-removing slag and copper-containing hazardous waste according to claim 1, wherein in the oxygen-enriched smelting process, the oxygen concentration in oxygen-enriched air is 50-75%, the oxygen-carbon ratio is 2.0-2.4, and the oxygen-carbon ratio is the ratio of the oxygen volume to the carbon mass in anthracite.
8. The method for treating wet process impurity-removing slag and copper-containing hazardous waste according to claim 1, wherein the smelting mixture is subjected to oxygen-enriched smelting in an oxygen-enriched side-blown smelting tank, and after smelting and layering, the lower layer material is led out to a steel casting mold for water-cooling ingot casting to obtain the matte ingot.
9. The method for treating wet process impurity-removing slag and copper-containing hazardous waste according to claim 8, wherein the smelting mixture is subjected to oxygen-enriched smelting in an oxygen-enriched side-blown smelting tank, gases generated in the smelting process are sequentially guided to a tempering tower and a desulfurization tower, and tail gas is discharged after desulfurization.
10. The method for treating wet process impurity-removing slag and copper-containing hazardous waste according to claim 8, wherein the mass percentage of metal copper in the matte ingot is more than 50%.
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