CN1067440C - Method for treating lead-containing soot - Google Patents
Method for treating lead-containing soot Download PDFInfo
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- CN1067440C CN1067440C CN98114118A CN98114118A CN1067440C CN 1067440 C CN1067440 C CN 1067440C CN 98114118 A CN98114118 A CN 98114118A CN 98114118 A CN98114118 A CN 98114118A CN 1067440 C CN1067440 C CN 1067440C
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- 239000004071 soot Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000012141 concentrate Substances 0.000 claims abstract description 18
- 238000005245 sintering Methods 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 11
- 238000003723 Smelting Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000004907 flux Effects 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 25
- 229910052717 sulfur Inorganic materials 0.000 claims description 25
- 239000011593 sulfur Substances 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 6
- 239000004615 ingredient Substances 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000009853 pyrometallurgy Methods 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 238000010791 quenching Methods 0.000 abstract description 2
- 230000000171 quenching effect Effects 0.000 abstract description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract 1
- -1 flux Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000011230 binding agent Substances 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
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- 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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- Manufacture And Refinement Of Metals (AREA)
Abstract
一种含铅烟灰的处理方法、属于有色金属火法冶金领域，可利用传统烧结机焙烧、鼓风炉熔炼工艺和设备，大比例地处理含铅烟灰，其中铅烟灰与铅精矿的混合比为1∶2-6∶1，即铅烟灰加入量为混合铅物料的约30%-85%，烧结前再配入返粉、熔剂、水淬渣和焦粉，同时注意掌握好烧结过程的工艺条件，便可使产出的烧结块满足后续工序的要求。本方法具有简便、容易操作及处理成本低的特点，为大量处理铅烟灰等廉价物料提供了经验。A method for processing lead-containing soot, belonging to the field of non-ferrous metal pyrometallurgy, can use traditional sintering machine roasting, blast furnace smelting technology and equipment to process lead-containing soot in a large proportion, wherein the mixing ratio of lead soot and lead concentrate is 1 :2-6:1, that is, the amount of lead soot added is about 30%-85% of the mixed lead material. Before sintering, return powder, flux, water quenching slag and coke powder are added, and at the same time, pay attention to the process conditions of the sintering process , so that the produced sintered block can meet the requirements of the subsequent process. The method has the characteristics of simplicity, easy operation and low treatment cost, and provides experience for mass treatment of cheap materials such as lead soot.
Description
本发明涉及一种含铅烟灰的处理方法，特别是一种利用传统的烧结机焙烧、鼓风炉熔炼的火法炼铅工艺处理烟灰的方法，属于有色金属火法冶金技术领域。The invention relates to a method for processing lead-containing soot, in particular to a method for treating soot by utilizing a traditional sintering machine roasting and blast furnace smelting pyrometallurgy process, and belongs to the technical field of nonferrous metal pyrometallurgy.
传统的火法炼铅工艺中产生的含铅烟灰，含铅量为40％～45％(重量计，以下同)含硫量为8％～10％，具有粒度小、亲水性差、水易湿润等特点，由于与铅精矿比，其含铅、含硫品位低，呈粉尘状，无法采用火法工艺单独处理，国内外炼铅厂家均采用将其作为辅助料返回至铅烧结配料，其投入量与铅精矿相比为1∶4，最高不超过1∶3。当生产正常时，所产出的烟灰基本不会积存，一旦生产出现波动时就会积存大量的烟灰，国内某铅厂就曾因种种原因积存了数万吨铅烟灰，不仅造成企业资金的积压，也不利于以后企业的正常生产。The lead-containing soot produced in the traditional pyrometallurgy process has a lead content of 40% to 45% (by weight, the same below) and a sulfur content of 8% to 10%. It has small particle size, poor hydrophilicity, and easy water Wet and other characteristics, due to the low lead and sulfur content compared with lead concentrate, it is dusty and cannot be treated separately by pyrotechnics. Lead smelting manufacturers at home and abroad use it as an auxiliary material to return to the lead sintering ingredients. The input amount is 1:4 compared with the lead concentrate, and the maximum is no more than 1:3. When the production is normal, the produced soot will basically not accumulate. Once the production fluctuates, a large amount of soot will accumulate. A domestic lead factory once accumulated tens of thousands of tons of lead soot due to various reasons, which not only caused a backlog of corporate funds , It is also not conducive to the normal production of enterprises in the future.
本发明的目的就是为解决背景技术的上述不足，寻求一种简单、方便、能有效地处理含铅烟灰的方法。通过不断的研究和试验，终于给出了这种利用传统工艺和设备，大量地处理含铅烟灰的火法冶金工艺，从而缓解了企业面临的难题，并为今后以含铅烟灰取代部分铅精矿，大幅度地降低铅生产中的冶炼成本开拓了新的道路。The object of the present invention is to seek a simple, convenient and effective method for dealing with lead-containing soot to solve the above-mentioned deficiencies of the background technology. Through continuous research and testing, this kind of pyrometallurgical process that uses traditional technology and equipment to process lead-containing soot in large quantities has finally been given, thereby alleviating the difficulties faced by enterprises and laying a foundation for replacing part of lead concentrate with lead-containing soot in the future. mines, greatly reducing the cost of smelting in lead production and opening up a new road.
本发明给出的这种利用传统的烧结机烧结-鼓风炉熔炼工艺，处理含铅烟灰的方法，包括有原料准备、烧结焙烧、鼓风炉熔炼等工序，与背景技术不同之处在于，根据用铅烟灰做主要原料与用铅精矿做主要原料而存在的差异，采取了下列技术措施：This method of utilizing the traditional sintering machine sintering-blast furnace smelting process provided by the present invention to process lead-containing soot includes processes such as raw material preparation, sintering and roasting, and blast furnace smelting. The difference from the background technology is that according to the use of lead soot The following technical measures have been taken for the difference between making the main raw material and using lead concentrate as the main raw material:
a)．原料准备时，针对铅烟灰呈粉尘状不易吸水的特点，需先对含铅烟灰单独加水湿润并使之焖透，其水份控制在8％～10％(重量计)，然后再配入少量铅精矿进行堆式配料并反复捣混均匀，其中含铅烟灰与铅精矿为1∶2至6∶1，即含铅烟灰占混合物料的约30％-85％(重量计)。远远超过背景技术视为禁区的25％(重量计)，最后在混合后的铅物料中按选定的渣型再配入返粉、熔剂、水淬渣和焦粉。a). When preparing raw materials, in view of the fact that the lead soot is dusty and difficult to absorb water, it is necessary to add water to the lead-containing soot and let it soak thoroughly. The water content is controlled at 8% to 10% (by weight), and then a small amount of The lead concentrate is batched in batches and repeatedly pounded evenly, wherein the ratio of lead-containing soot and lead concentrate is 1:2 to 6:1, that is, the lead-containing soot accounts for about 30%-85% (by weight) of the mixed material. It far exceeds the 25% (by weight) that is regarded as a restricted area in the background technology. Finally, the mixed lead material is mixed with return powder, flux, water-quenched slag and coke powder according to the selected slag type.
b)．烧结焙烧时，在保证混合物料中有关组成为(重量计)：水份5％-6％铅含量35％-45％；硫含量5％-6％及烧结机鼓风强度保持在20-25M3/M2.min的条件下，烧结料层的厚度为280-320mm台车车速为1100-1300mm/min，点火炉温度为900-1000℃。b). When sintering and roasting, ensure that the relevant composition in the mixed material is (by weight): moisture content 5%-6%, lead content 35%-45%, sulfur content 5%-6%, and sintering machine blast strength maintained at 20-25M Under the condition of 3 /M 2 .min, the thickness of the sintered material layer is 280-320mm, the speed of the trolley is 1100-1300mm/min, and the temperature of the ignition furnace is 900-1000°C.
由于烟灰含铅品位低，将直接影响产块率和烧结块含铅品位，可以适当加入水淬渣以起粘结剂作用，借以提高产块率，同时亦可选择适当的渣型来降低熔剂率，借以提高混合物料含铅品位，使烧结块的含铅品位稳定在35％-40％(重量计)，满足后继鼓风炉熔炼的要求。Due to the low lead grade in soot, it will directly affect the yield of sintered lumps and the lead grade of sintered agglomerates. Water-quenched slag can be properly added to act as a binder to increase the yield of agglomerates. At the same time, appropriate slag types can be selected to reduce flux rate, so as to improve the lead-containing grade of the mixed material, so that the lead-containing grade of the sintered block is stabilized at 35%-40% (by weight), which meets the requirements of subsequent blast furnace smelting.
由于烟灰中含硫低，所配出的混合物料含硫只有3％-4％(重量计)，远低于以铅精矿为主配出混合物料中硫含量为5.5％-6.5％(重量计)的水平，因此达不到烧结要求，即焙烧过程的热量不够，所以必须补充一定量的焦粉，焦粉的加入量按混合配料中含硫量与原以铅精矿为主所配成的混合物料中含硫量相比所减少的含硫量计算，即按含硫量每减少1％，加入的焦粉量为0.3％-0.7％(重量计)计算。Due to the low sulfur content in the soot, the sulfur content of the mixed material formulated is only 3%-4% (by weight), which is far lower than the sulfur content of 5.5%-6.5% (by weight) in the mixed material formulated mainly with lead concentrate. Therefore, the sintering requirements cannot be met, that is, the heat in the roasting process is not enough, so a certain amount of coke powder must be added. The amount of coke powder added is based on the sulfur content in the mixed ingredients and the original lead concentrate. Calculate the sulfur content in the resulting mixed material compared with the reduced sulfur content, that is, for every 1% reduction in sulfur content, the amount of coke powder added is 0.3%-0.7% (by weight).
与已有处理铅烟灰的各类方法相比，本发明给出的这种处理含铅烟灰的方法，具有工艺简便，可操作性强，处理成本低的特点，尤其是可充分利用国内炼铅厂家现有工艺设备，处理因非正常原因引起的铅烟灰积压现象，同时也为厂家以廉价的含铅烟灰或其它类似低品位含铅含硫物料，取代部分或大部分铅精矿来进行铅的生产提供了经验。Compared with the existing methods for processing lead soot, the method for processing lead-containing soot provided by the present invention has the characteristics of simple process, strong operability, and low processing cost, especially can make full use of domestic lead smelting The manufacturer's existing process equipment can deal with the backlog of lead soot caused by abnormal reasons, and at the same time, it can also replace part or most of the lead concentrate with cheap lead-containing soot or other similar low-grade lead-containing and sulfur-containing materials for the manufacturer. production provides experience.
实施例：Example:
将铅烟灰先单独加水湿润，反复捣混并使并焖透，再按铅烟灰与铅精矿以1∶2,1∶1,4∶1的比例分别配成混合含铅物料，其中铅烟灰的主要成份为(重量计)：铅40％-45％；锌45-6％；铜1.8％-2.1；硫8％～10％。铅精矿的主要成份为(重量计)：铅57％～67％；锌2％～5％；铜0.2％～2％；硫15％～21％。混合铅物料中还要配入返粉和熔剂，由于返粉率比用铅精矿为主时的配料要偏低，可用水淬渣补充，本实施例中用量为混合物料量的5％左右(重量计)，由于烟灰中含硫低，混合铅物料中硫含量仅为3％～4％，为补充热量，需加入焦粉，焦粉加入量按混合物料中含硫量与原以铅精矿为主配成混合料中硫含量相比，每减少1％的硫加入的焦粉量为0.3％～0.7％(重量计)，本实施例中加入的焦粉量为混合物料量的0.5％(焦粉含碳按70％计)。为保证混合物料含铅品位，选用的渣型为高铁、铁硅拉平渣型，其渣型组成(重量计)：锌为7％～10％；铁为21％～24％；二氧化硅为22％～25％；氧化钙为18％～20％。影响烧结焙烧结果的因素较多，本实施例在保证混合物料中有关组成为(重量计)：水份5％～6％；铅含量35％～45％；硫含量4.5％～5.0％及烧结机鼓风强度保持在20～25M3/M2·min的条件下，进行其它主要工艺条件的试验，其结果如表1所示。The lead soot is moistened with water alone, repeatedly smashed and simmered thoroughly, and then the lead soot and lead concentrate are formulated into mixed lead-containing materials at a ratio of 1:2, 1:1, and 4:1, of which the lead soot The main components are (by weight): 40%-45% of lead; 45-6% of zinc; 1.8%-2.1% of copper; 8%-10% of sulfur. The main components of lead concentrate are (by weight): 57% to 67% of lead; 2% to 5% of zinc; 0.2% to 2% of copper; 15% to 21% of sulfur. In the mixed lead material, return powder and flux should also be added. Since the return powder rate is lower than that of the lead concentrate, it can be supplemented by water quenching slag. In this embodiment, the dosage is about 5% of the mixture. (by weight), due to the low sulfur content in the soot, the sulfur content in the mixed lead material is only 3% to 4%. In order to supplement the heat, it is necessary to add coke powder. Compared with the sulfur content in the mixture made of concentrate, the amount of coke powder added for every 1% reduction of sulfur is 0.3% to 0.7% (by weight), and the amount of coke powder added in this embodiment is 1% of the mixture amount 0.5% (coke powder contains 70% carbon). In order to ensure the lead-containing grade of the mixed material, the selected slag type is high iron, iron-silicon flattened slag type, and its slag type composition (by weight): zinc is 7% to 10%; iron is 21% to 24%; silicon dioxide is 22% to 25%; calcium oxide is 18% to 20%. There are many factors affecting the sintering and roasting results. In this embodiment, the relevant composition in the mixed material is guaranteed to be (by weight): 5% to 6% of moisture; 35% to 45% of lead content; 4.5% to 5.0% of sulfur content and sintering The blower intensity of the machine was kept at 20-25M 3 /M 2 ·min, and other main technological conditions were tested. The results are shown in Table 1.
表1确定主要工艺条件实验
本实施例产出的烧结块铅品位稳定在40％左右，块残硫控制在2％以下(均为重量计)，在后继的鼓风炉熔炼中，通过热风熔炼，床能力可在50～60t/M2·d，渣含铅在2.1％以下，完全适应高产稳产的工业化要求。The lead grade of the sintered block produced in this embodiment is stable at about 40%, and the block residual sulfur is controlled below 2% (both by weight). In the subsequent blast furnace smelting, the bed capacity can be 50-60t/ M 2 ·d, the slag contains less than 2.1% lead, which fully meets the industrial requirements of high and stable production.
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| CN98114118A CN1067440C (en) | 1998-06-30 | 1998-06-30 | Method for treating lead-containing soot |
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| CN116287685A (en) * | 2023-03-20 | 2023-06-23 | 白银有色红鹭资源综合利用科技有限公司 | A low-sulfur roasting technology for belt sintering machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50101202A (en) * | 1974-01-12 | 1975-08-11 | ||
| JPS51125603A (en) * | 1975-01-28 | 1976-11-02 | Nippon Steel Corp | A method of separating metal-containing power |
| US4244905A (en) * | 1977-09-08 | 1981-01-13 | Klockner-Humboldt-Deutz Ag | Method and apparatus for the manufacture of mold bodies, particularly pellets from secondary slurries of the metallurgical industry |
| CS139186A1 (en) * | 1986-02-28 | 1988-12-15 | Jaroslav Drasar | Treatment of lead fly ashes containig chlor and device for making this process |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50101202A (en) * | 1974-01-12 | 1975-08-11 | ||
| JPS51125603A (en) * | 1975-01-28 | 1976-11-02 | Nippon Steel Corp | A method of separating metal-containing power |
| US4244905A (en) * | 1977-09-08 | 1981-01-13 | Klockner-Humboldt-Deutz Ag | Method and apparatus for the manufacture of mold bodies, particularly pellets from secondary slurries of the metallurgical industry |
| CS139186A1 (en) * | 1986-02-28 | 1988-12-15 | Jaroslav Drasar | Treatment of lead fly ashes containig chlor and device for making this process |
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