CN114703378A - Method for regulating slag type of pyrometallurgical copper smelting - Google Patents
Method for regulating slag type of pyrometallurgical copper smelting Download PDFInfo
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 239000010949 copper Substances 0.000 title claims abstract description 85
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 82
- 239000002893 slag Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003723 Smelting Methods 0.000 title claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 title abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 99
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 96
- 239000001301 oxygen Substances 0.000 claims abstract description 96
- 238000007664 blowing Methods 0.000 claims abstract description 63
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 230000004907 flux Effects 0.000 claims abstract description 14
- 230000003647 oxidation Effects 0.000 claims abstract description 14
- HYXXTUOWDIJLPS-UHFFFAOYSA-N copper;sulfane Chemical compound S.[Cu+2] HYXXTUOWDIJLPS-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000019738 Limestone Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000006028 limestone Substances 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims 1
- 235000012239 silicon dioxide Nutrition 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 abstract description 9
- 238000007885 magnetic separation Methods 0.000 abstract description 9
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 2
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 238000005188 flotation Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 8
- 239000011044 quartzite Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009853 pyrometallurgy Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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
- C22B15/00—Obtaining copper
- C22B15/0026—Pyrometallurgy
- C22B15/0028—Smelting or converting
- C22B15/003—Bath smelting or converting
- C22B15/0041—Bath smelting or converting in converters
-
- 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
- C22B15/0052—Reduction 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/12—Dry methods smelting of sulfides or formation of mattes by gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明属于冶金技术领域，提供了一种火法炼铜渣型调控的方法。本发明提供的火法炼铜渣型调控的方法包括：在铜锍中加入熔剂后，进行喷吹富氧空气，然后进行保温，得到吹炼熔渣和粗铜；所述喷吹富氧空气中氧气的体积大于所述铜锍完全氧化所需的氧气的体积。本发明控制喷吹富氧空气中氧气的体积大于所述铜锍完全氧化所需的氧气的体积，过量的氧气将金属铜氧化为Cu2O，Cu2O和吹炼熔渣中的Fe3O4与O2继续发生氧化生成CuFeO2，使得吹炼熔渣中Fe3O4含量明显减少，粘度减小，促进渣‑铜分离，减少了吹炼熔渣中铜的机械夹带损失。同时，CuFeO2可在后续的磁选工序中得到回收利用。The invention belongs to the technical field of metallurgy, and provides a method for regulating and controlling the slag shape of pyrometallurgical copper smelting. The method for controlling the slag type of pyrometallurgical copper smelting provided by the present invention includes: after adding flux into copper matte, spraying oxygen-enriched air, and then maintaining heat to obtain blowing smelting slag and blister copper; the blowing oxygen-enriched air The volume of oxygen in the medium is greater than the volume of oxygen required for complete oxidation of the copper sulfonium. The invention controls the volume of oxygen in the sprayed oxygen-enriched air to be larger than the volume of oxygen required for complete oxidation of the copper matte, and the excess oxygen oxidizes the metal copper into Cu 2 O, Cu 2 O and Fe 3 in the smelting slag. O 4 and O 2 continue to oxidize to form CuFeO 2 , which significantly reduces Fe 3 O 4 content and viscosity in blowing smelting slag, promotes slag-copper separation, and reduces mechanical entrainment loss of copper in blowing smelting slag. At the same time, CuFeO 2 can be recycled in the subsequent magnetic separation process.
Description
技术领域technical field
本发明涉及冶金技术领域，尤其涉及一种火法炼铜渣型调控的方法。The invention relates to the technical field of metallurgy, in particular to a method for regulating and controlling the slag shape of pyrometallurgical copper smelting.
背景技术Background technique
现代铜冶炼行业中，火法炼铜占铜产量的90％以上，火法工艺以熔炼-吹炼两段法炼铜为主。基于炼铜原料高铁特性，铜锍吹炼过程中，由于金属铁比铜的亲氧性强，原料中铁优先氧化，吹炼过程持续喷吹富氧空气使部分铁过氧化生成Fe3O4。Fe3O4导致吹炼熔渣粘度增加，排渣困难。同时，可能使吹炼熔渣泡沫化，恶化渣-铜分离条件，增大吹炼熔渣中铜的机械夹带损失。生产数据表明，吹炼熔渣含铜量在4％～18％之间，Fe3O4含量在25％～50％之间。In the modern copper smelting industry, pyrometallurgical copper smelting accounts for more than 90% of copper production, and the pyrometallurgical process is mainly smelting-blowing two-stage copper smelting. Based on the high iron characteristics of copper smelting raw materials, in the process of copper matte blowing, due to the stronger oxophilicity of metallic iron than copper, iron in the raw material is preferentially oxidized. During the blowing process, oxygen-enriched air is continuously injected to make part of the iron peroxidized to form Fe 3 O 4 . Fe 3 O 4 increases the viscosity of blowing slag and makes slag discharge difficult. At the same time, it may foam the blowing slag, deteriorate the slag-copper separation conditions, and increase the mechanical entrainment loss of copper in the blowing slag. Production data show that the copper content of the blowing slag is between 4% and 18%, and the content of Fe 3 O 4 is between 25% and 50%.
目前，针对排渣困难的问题，冶炼企业大多采用选矿法或添加熔剂/还原剂的方式来解决。有研究表明：吹炼熔渣中高达75％铜以金属态形式存在，利用选矿法回收吹炼熔渣中铜的效果并非十分理想，铜损失相对较大。而增大熔剂用量以及添加还原剂的方法，会导致吹炼熔渣量变大，铜绝对量损失增大，同时大量熔剂升温吸热还导致能耗加大，增加生产成本。可见，选矿法或添加熔剂/还原剂法并没有很好地解决吹炼熔渣排渣困难的问题。At present, most of the smelting enterprises adopt the beneficiation method or the method of adding flux/reducing agent to solve the problem of difficult slag discharge. Studies have shown that up to 75% of the copper in the blowing smelting slag exists in the form of metal. The method of increasing the amount of flux and adding reducing agent will lead to an increase in the amount of blowing slag and an increase in the absolute loss of copper. At the same time, a large amount of flux heats up and absorbs heat, which also increases energy consumption and increases production costs. It can be seen that the beneficiation method or the addition of flux/reducing agent method does not solve the problem of difficult slag discharge in blowing smelting slag.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明的目的在于提供一种火法炼铜渣型调控的方法。本发明提供的吹炼的方法很好地解决了吹炼熔渣排渣困难的问题。In view of this, the object of the present invention is to provide a method for regulating and controlling the slag type of pyrometallurgical copper smelting. The blowing method provided by the invention well solves the problem of difficulty in blowing and smelting slag discharge.
为了实现上述发明目的，本发明提供以下技术方案：In order to achieve the above-mentioned purpose of the invention, the present invention provides the following technical solutions:
本发明提供了一种火法炼铜渣型调控的方法，包括以下步骤：The invention provides a method for controlling pyrometallurgical slag type, comprising the following steps:
在铜锍中加入熔剂后，进行喷吹富氧空气，然后进行保温，得到吹炼熔渣和粗铜；After adding flux to the copper matte, spray oxygen-enriched air, and then heat preservation to obtain blowing smelting slag and blister copper;
所述喷吹富氧空气中氧气的体积大于所述铜锍完全氧化所需的氧气的体积。The volume of oxygen in the sprayed oxygen-enriched air is greater than the volume of oxygen required for complete oxidation of the copper matte.
优选地，所述喷吹富氧空气中氧气的体积符合公式1：Preferably, the volume of oxygen in the sprayed oxygen-enriched air conforms to formula 1:
V1＝aV2 公式1；V 1 =aV 2 formula 1;
公式1中，a＝1.01～1.1，V1为喷吹富氧空气中氧气的体积，V2为铜锍完全氧化所需的氧气的体积。In formula 1, a=1.01-1.1, V 1 is the volume of oxygen in the oxygen-enriched air sprayed, and V 2 is the volume of oxygen required for complete oxidation of copper matte.
优选地，所述保温的时间为10～20min。Preferably, the incubation time is 10-20 min.
优选地，所述喷吹富氧空气的气体为富氧空气；所述富氧空气中氧气的体积含量为21～26％。Preferably, the gas for spraying the oxygen-enriched air is oxygen-enriched air; the volume content of oxygen in the oxygen-enriched air is 21-26%.
优选地，所述富氧空气的喷吹流量为25000～30000Nm3/h。Preferably, the injection flow rate of the oxygen-enriched air is 25000-30000 Nm 3 /h.
优选地，所述铜锍完全氧化所需的氧气的体积指铜锍中S元素转化为SO2所需要的氧气的量。Preferably, the volume of oxygen required for complete oxidation of the copper sulfonium refers to the amount of oxygen required for the conversion of S element in the copper sulfonium to SO 2 .
优选地，所述喷吹富氧空气和保温的过程中，熔体的温度独立地为1160～1300℃。Preferably, in the process of blowing oxygen-enriched air and keeping warm, the temperature of the melt is independently 1160-1300°C.
优选地，所述熔剂包括石灰石、石灰和石英石中的一种或多种，Preferably, the flux includes one or more of limestone, lime and quartzite,
优选地，所述吹炼熔渣含有CuFeO2；所述吹炼熔渣中CuFeO2的质量含量为8～25％。Preferably, the blowing slag contains CuFeO 2 ; the mass content of CuFeO 2 in the blowing slag is 8-25%.
优选地，所述火法炼铜渣型调控的方法在铜转炉中进行；所述喷吹富氧空气中的富氧空气通过所述铜转炉的风口进行喷吹。Preferably, the method for controlling the slag type of the pyrometallurgical copper smelting is performed in a copper converter; the oxygen-enriched air in the injection of the oxygen-enriched air is injected through the tuyere of the copper converter.
本发明提供了一种火法炼铜渣型调控的方法，包括以下步骤：在铜锍中加入熔剂后，进行喷吹富氧空气，然后进行保温，得到吹炼熔渣和粗铜；所述喷吹富氧空气中氧气的体积大于所述铜锍完全氧化所需的氧气的体积。本发明控制喷吹富氧空气中氧气的体积大于所述铜锍完全氧化所需的氧气的体积，过量的氧气将少部分金属铜氧化为Cu2O，Cu2O和吹炼熔渣中的Fe3O4与O2继续发生氧化反应生成CuFeO2，使得吹炼熔渣中Fe3O4含量明显减少，粘度减小，促进渣-铜分离，减少了吹炼熔渣中铜的机械夹带损失。同时，CuFeO2可在后续的铜渣磁选工序中得到回收利用。本发明的吹炼的方法可改善吹炼熔渣的流动性，提高吹炼熔渣的排渣效率，解决铜冶炼工业转炉吹炼期排渣困难以及渣中铜损失大的问题，操作简单、实用性强、经济效益好。The invention provides a method for regulating the slag shape of pyrometallurgical copper smelting, which comprises the following steps: after adding flux to copper matte, blowing oxygen-enriched air, and then maintaining heat to obtain blown smelting slag and blister copper; The volume of oxygen in the sprayed oxygen-enriched air is greater than the volume of oxygen required for complete oxidation of the copper matte. The invention controls the volume of oxygen in the sprayed oxygen-enriched air to be larger than the volume of oxygen required for complete oxidation of the copper matte, and the excess oxygen oxidizes a small part of metallic copper into Cu 2 O, Cu 2 O and the oxygen in the smelting slag. Fe 3 O 4 and O 2 continue to undergo oxidation reaction to form CuFeO 2 , which reduces the Fe 3 O 4 content and viscosity in the blowing smelting slag significantly, promotes slag-copper separation, and reduces the mechanical entrainment of copper in the blowing smelting slag loss. At the same time, CuFeO 2 can be recycled in the subsequent copper slag magnetic separation process. The blowing method of the invention can improve the fluidity of the blowing smelting slag, improve the slag discharging efficiency of the blowing smelting slag, solve the problems of difficult slag discharging and large loss of copper in the slag during the converter blowing period of the copper smelting industry, and has the advantages of simple operation, It has strong practicability and good economic benefits.
具体实施方式Detailed ways
本发明提供了一种火法炼铜渣型调控的方法，包括以下步骤：The invention provides a method for controlling pyrometallurgical slag type, comprising the following steps:
在铜锍中加入熔剂后，进行喷吹富氧空气，然后进行保温，得到吹炼熔渣和粗铜；After adding flux to the copper matte, spray oxygen-enriched air, and then heat preservation to obtain blowing smelting slag and blister copper;
所述喷吹富氧空气中氧气的体积大于所述铜锍完全氧化所需的氧气的体积。The volume of oxygen in the sprayed oxygen-enriched air is greater than the volume of oxygen required for complete oxidation of the copper matte.
在本发明中，如无特殊说明，本发明所用原料均优选为市售产品。In the present invention, unless otherwise specified, the raw materials used in the present invention are preferably commercially available products.
在本发明中，所述铜锍优选来自冶炼阶段。In the present invention, the copper matte is preferably from the smelting stage.
在本发明中，所述熔剂优选包括石灰石、石灰和石英石中的一种或多种，进一步优选包括石英石与石灰的混合物、石英石与石灰石的混合物。In the present invention, the flux preferably includes one or more of limestone, lime and quartzite, and further preferably includes a mixture of quartzite and lime, and a mixture of quartzite and limestone.
在本发明中，所述熔剂的添加质量优选根据铜锍中除Cu元素外的金属元素，与熔剂一起氧化造渣，完全转化为渣相计算。In the present invention, the added quality of the flux is preferably calculated according to the metal elements other than Cu element in the copper matte, which are oxidized together with the flux to form slag and completely converted into the slag phase.
在本发明中，所述喷吹富氧空气的气体为富氧空气；所述富氧空气中氧气的体积含量优选为21～26％，进一步优选为22～25％，更优选为23～24％。In the present invention, the gas for spraying oxygen-enriched air is oxygen-enriched air; the volume content of oxygen in the oxygen-enriched air is preferably 21-26%, more preferably 22-25%, more preferably 23-24% %.
在本发明中，所述富氧空气的喷吹流量优选为25000～30000Nm3/h，进一步优选为26000～27000Nm3/h。In the present invention, the injection flow rate of the oxygen-enriched air is preferably 25,000 to 30,000 Nm 3 /h, and more preferably 26,000 to 27,000 Nm 3 /h.
在本发明中，所述喷吹富氧空气中氧气的体积大于所述铜锍完全氧化所需的氧气的体积。In the present invention, the volume of oxygen in the sprayed oxygen-enriched air is greater than the volume of oxygen required for complete oxidation of the copper matte.
在本发明中，所述喷吹富氧空气中氧气的体积优选符合公式1：In the present invention, the volume of oxygen in the sprayed oxygen-enriched air preferably conforms to formula 1:
V1＝aV2 公式1；V 1 =aV 2 formula 1;
公式1中，a＝1.01～1.1，V1为喷吹富氧空气中氧气的体积，V2为铜锍完全氧化所需的氧气的体积。In formula 1, a=1.01-1.1, V 1 is the volume of oxygen in the oxygen-enriched air sprayed, and V 2 is the volume of oxygen required for complete oxidation of copper matte.
在本发明中，公式1中，a进一步优选为1.03～1.08，更优选为1.05～1.07。In the present invention, in Formula 1, a is more preferably 1.03 to 1.08, and more preferably 1.05 to 1.07.
在本发明中，所述铜锍完全氧化所需的氧气的体积指铜锍中S元素转化为SO2所需要的氧气的量。In the present invention, the volume of oxygen required for complete oxidation of the copper sulfonium refers to the amount of oxygen required for the conversion of S element in the copper sulfonium to SO 2 .
在本发明中，所述保温的时间优选为10～20min。In the present invention, the holding time is preferably 10-20 min.
在本发明中，所述喷吹富氧空气和保温的过程中，熔体的温度独立地优选为1160～1300℃，进一步优选为1200～1250℃。In the present invention, in the process of blowing oxygen-enriched air and keeping warm, the temperature of the melt is independently preferably 1160-1300°C, more preferably 1200-1250°C.
在本发明中，所述吹炼熔渣优选含有CuFeO2；所述吹炼熔渣中CuFeO2的质量含量优选为8～25％。In the present invention, the blowing slag preferably contains CuFeO 2 ; the mass content of CuFeO 2 in the blowing slag is preferably 8-25%.
在本发明中，所述吹炼熔渣优选进行回收；所述回收包括依次进行浮选和磁选。所述浮选后，本发明得到部分含铜矿物和浮选渣；所述浮选渣进行磁选。本发明对所述浮选和磁选的参数不做具体限定，采用本领域技术人员熟知的浮选和磁选参数即可。In the present invention, the blowing slag is preferably recovered; the recovery includes flotation and magnetic separation in sequence. After the flotation, the present invention obtains part of copper-containing minerals and flotation slag; the flotation slag is subjected to magnetic separation. The present invention does not specifically limit the parameters of the flotation and magnetic separation, and the parameters of flotation and magnetic separation well known to those skilled in the art can be used.
所述磁选后，本发明优选得到CuFeO2和磁铁矿及尾渣。After the magnetic separation, the present invention preferably obtains CuFeO 2 and magnetite and tailings.
在本发明中，所述火法炼铜渣型调控的方法优选在铜转炉中进行。在本发明中，所述喷吹富氧空气时，所述富氧空气通过铜转炉的风口进行喷吹。In the present invention, the method for controlling the slag type of the pyrometallurgical copper smelting is preferably carried out in a copper converter. In the present invention, when the oxygen-enriched air is sprayed, the oxygen-enriched air is sprayed through the tuyere of the copper converter.
下面结合实施例对本发明提供的火法炼铜渣型调控的方法进行详细的说明，但是不能把它们理解为对本发明保护范围的限定。The following describes the method for controlling the pyrometallurgical slag type provided by the present invention in detail with reference to the examples, but they should not be construed as limiting the protection scope of the present invention.
对比例1Comparative Example 1
本实例选取某铜冶炼厂所生产的铜锍，其成分分析如表1所示。In this example, copper matte produced by a copper smelter is selected, and its composition analysis is shown in Table 1.
表1铜锍成分分析Table 1 Composition analysis of copper matte
对铜锍进行吹炼的方法，包括以下步骤：The method for blowing copper matte comprises the following steps:
将100t铜锍转运至铜转炉中，通过铜转炉的风口，以27000Nm3/h的流速喷吹体积为82000m3的富氧空气(富氧空气中氧气的体积百分含量为21％)，加入1600kg的SiO2，得到粗铜和吹炼渣。对所得吹炼熔渣进行分析，其物相组成如表2所示。同时，得到吹炼熔渣的粘度为0.78Pa·s，吹炼熔渣中金属铜的质量含量为9.32％。Transfer 100t of copper matte to the copper converter, through the tuyere of the copper converter, spray oxygen-enriched air with a volume of 82,000m3 at a flow rate of 27000Nm 3 /h (the volume percentage of oxygen in the oxygen - enriched air is 21%), add 1600 kg of SiO 2 to obtain blister copper and blowing slag. The obtained blowing slag was analyzed, and its phase composition was shown in Table 2. At the same time, the viscosity of the obtained blowing slag was 0.78 Pa·s, and the mass content of metallic copper in the blowing slag was 9.32%.
表2对比例1所得吹炼熔渣的成分分析Composition analysis of blowing slag obtained in Table 2 Comparative Example 1
实施例1Example 1
重复对比例1，区别仅为，喷吹富氧空气的氧气的体积为实施例1中喷吹富氧空气的氧气的体积的1.10倍，结束喷吹富氧空气后，保温10min，使熔炼体系中吹炼熔渣与粗铜充分发生分离并沉降，转动炉体，完成排渣和出铜。Repeat Comparative Example 1, the only difference is that the volume of oxygen sprayed with oxygen-enriched air is 1.10 times the volume of oxygen sprayed with oxygen-enriched air in Example 1, after the end of spraying oxygen-enriched air, the temperature is kept for 10 min to make the smelting system The middle blowing smelting slag and blister copper are fully separated and settled, and the furnace body is rotated to complete slag discharge and copper discharge.
对所得吹炼熔渣进行分析，其物相组成如表3所示。同时，得到吹炼熔渣的粘度为0.48Pa·s，吹炼熔渣中金属铜的质量含量为1.94％。The obtained blowing slag was analyzed, and its phase composition is shown in Table 3. At the same time, the viscosity of the obtained blowing slag was 0.48 Pa·s, and the mass content of metallic copper in the blowing slag was 1.94%.
将所得吹炼熔渣进行浮选，回收部分含铜矿相。The obtained blowing slag is subjected to flotation to recover part of the copper-containing ore phase.
浮选所得浮选渣进行磁选，回收磁铁矿和铜铁矿相。The flotation slag obtained by flotation is subjected to magnetic separation to recover magnetite and delafossite phases.
表3实施例1所得吹炼熔渣的成分分析Composition analysis of the blowing slag obtained in Table 3 Example 1
对比实施例1和对比例1可以看出，过量喷吹0.1倍氧气量，使得吹炼熔渣的粘度降低0.3Pa·s，金属铜损失减少7.38％。Comparing Example 1 with Comparative Example 1, it can be seen that the excessive injection of 0.1 times the amount of oxygen reduces the viscosity of the blowing smelting slag by 0.3 Pa·s and the loss of metallic copper by 7.38%.
对比例2Comparative Example 2
本实例选取某铜冶炼厂所生产的铜锍，其成分分析如表4所示。In this example, the copper matte produced by a copper smelter is selected, and its composition analysis is shown in Table 4.
表4铜锍成分分析Table 4 Copper matte composition analysis
对铜锍进行吹炼的方法，包括以下步骤：The method for blowing copper matte comprises the following steps:
将100t铜锍转运至铜转炉中，通过铜转炉的风口，以25000Nm3/h的流速喷吹体积为82000m3的富氧空气(富氧空气中氧气的体积百分含量为21％)，加入1200kg的SiO2，得到粗铜和吹炼渣。对所得吹炼熔渣进行分析，其物相组成如表5所示。同时，得到吹炼熔渣的粘度为0.72Pa·s，吹炼熔渣中金属铜的质量含量为5.46％。Transfer 100t of copper matte to the copper converter, through the tuyere of the copper converter, spray oxygen-enriched air with a volume of 82,000m3 at a flow rate of 25,000Nm 3 /h (the volume percentage of oxygen in the oxygen - enriched air is 21%), add 1200kg of SiO 2 to obtain blister copper and blowing slag. The obtained blowing slag was analyzed, and its phase composition is shown in Table 5. At the same time, the viscosity of the obtained blowing slag was 0.72 Pa·s, and the mass content of metallic copper in the blowing slag was 5.46%.
表5对比例2所得吹炼熔渣的成分分析Composition analysis of blowing slag obtained in Table 5 Comparative Example 2
实施例2Example 2
重复对比例2，区别仅为，喷吹富氧空气的氧气的体积为实施例1中喷吹富氧空气的氧气的体积的1.05倍，结束喷吹富氧空气后，保温10min，使熔炼体系中吹炼熔渣与铜充分发生分离并沉降，转动炉体，完成排渣和出铜。Repeat Comparative Example 2, the difference is only that the volume of oxygen sprayed with oxygen-enriched air is 1.05 times the volume of oxygen sprayed with oxygen-enriched air in Example 1, after the end of spraying oxygen-enriched air, the temperature is kept for 10 min to make the smelting system The middle blowing smelting slag and copper are fully separated and settled, and the furnace body is rotated to complete the slag discharge and copper discharge.
对所得吹炼熔渣进行分析，其物相组成如表6所示。同时，得到吹炼熔渣的粘度为0.21Pa·s，吹炼熔渣中金属铜的质量含量为0.05％。The obtained blowing slag was analyzed, and its phase composition is shown in Table 6. At the same time, the viscosity of the obtained blowing slag was 0.21 Pa·s, and the mass content of metallic copper in the blowing slag was 0.05%.
将所得吹炼熔渣进行浮选，回收部分含铜矿相。The obtained blowing slag is subjected to flotation to recover part of the copper-containing ore phase.
浮选所得浮选渣进行磁选，回收磁铁矿和铜铁矿相。The flotation slag obtained by flotation is subjected to magnetic separation to recover magnetite and delafossite phases.
表6实施例2所得吹炼熔渣的成分分析Composition analysis of the blowing slag obtained in Table 6 Example 2
对比实施例2和对比例2可以看出，过量喷吹0.05倍氧气量，使得所得吹炼熔渣的粘度降低0.51Pa·s，吹炼熔渣中金属铜损失减少5.41％。Comparing Example 2 and Comparative Example 2, it can be seen that excessive injection of 0.05 times the amount of oxygen reduces the viscosity of the resulting blowing slag by 0.51 Pa·s, and reduces the loss of metallic copper in the blowing slag by 5.41%.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2117410A (en) * | 1982-03-26 | 1983-10-12 | Inco Ltd | Process for the continuous production of blister copper |
| CN111334671A (en) * | 2020-04-03 | 2020-06-26 | 河南豫光金铅股份有限公司 | Short-process high-recovery-rate smelting method for chalcocite |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2117410A (en) * | 1982-03-26 | 1983-10-12 | Inco Ltd | Process for the continuous production of blister copper |
| CN111334671A (en) * | 2020-04-03 | 2020-06-26 | 河南豫光金铅股份有限公司 | Short-process high-recovery-rate smelting method for chalcocite |
Non-Patent Citations (1)
| Title |
|---|
| 袁海滨等: "降低顶吹吹炼过程渣含铜的生产试验", 《中国有色冶金》 * |
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