The zinc roasting process is a process stage where in the presence of oxygen and high temperature (about 920-950ºC) zinc sulphide concentrates react to zinc oxide. The zinc sulphide (ZnS, sphalerite) concentrates include also various amounts of other metal sulphides. For example iron appears not only in the forms of FeS and FeS2 …
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1. Roasting. Raw materials – zinc concentrate and zinc oxides recycled from the steel industry – are fed into a fluid bed roaster. This is step one in the production process. In the roaster, raw zinc materials are burned with air and are turned into calcine. Calcine looks like sand and has a temperature of 950 degrees Celsius.
Rauma et al. [5] developed a rule-based fuzzy controller that was successfully applied to a zinc roaster with a basal area of 72 m 2 in the Kokkola zinc plant. The application of this rule-based ...
Zinc (Zn) is an essential micronutrient for plants. ... Combined transcriptome and proteome analysis revealed the molecular regulation mechanisms of zinc homeostasis and antioxidant machinery in tobacco in response to different zinc supplies ... Minjiang University, Fuzhou 350108, China; College of Plant Protection, Fujian Agriculture and ...
The concentrates are fed into the fluidised bed roaster and roasted with oxygen at 950°C. The objective of the Roasting process is to convert zinc sulphide to acid soluble zinc oxide and sulphur dioxide gas. The collected zinc oxide is sent to the Leaching Plant and the sulphur dioxide goes to the Sulphuric Acid Plant via the Gas Cleaning ...
Let the roaster cool down after each roast. After cooling, always weed out the chaff in or under the roasting drum. Clean the main filter once a week or as necessary. Clean the chaff from the drum's roasting chamber once a month. Use a cleaner that cuts through grease and a nylon scrubbing pad to clean out the roasting oil.
l. INTRODUCTION The roasting of zinc concentrates at the Kokkola plant, now a part of the Boliden company, is carried out in two fluidised bed furnaces. The furnaces are quite well instrumented, and have automatic controllers for key variables. A major goal in the roaster operation IS the maximisation of the production within given …
At the Kokkola Zinc plant of Outokumpu, there are two almost identical continuous roaster furnaces with the total capacity to feed about 355 000 tons of zinc concentrates (Zn 53 %) per year. The furnaces are 17 m high and have a basal area of 72 m2 each. As well as sulphur dioxide, the also plant produces steam as a by-product.
Zinc Roasting, Gas Cleaning and Aci d Plant . ... due to the frequent use of this equipment in other . 32. ... i.e. at Kokkola zinc plant and at two zinc plants in Japan in the be ginning of 1970's.
August 5, 2009 - The Roasting and Sulphuric Acid System for Zinc-Smelting of Xing'an Copper-zinc Smelting Company was put into commissioning recently in Inner Mongolia. This facility was contracted by China ENFI Engineering Corp. (ENFI) on an EPC basis. After heating by the convertor of sulphuric acid system, the overall system has …
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However, the smelter failed to return to full capacity upon the completion of maintenance, leveling off at approximately 80%, and with zinc ingot output at this smelter during May expected to be less than 2,000 mt. Inner Mongolia Xing'an Copper & Zinc Smelter has been operational in August 2009 and has a design capacity of 100 kt/yr.
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Bernd Kerstiens bernd.kerstiens@outotec Outotec , D-61440 Oberursel, Germany. Abstract. Advanced optimizing control of the fluidised bed zinc roaster has been in use for an extended period at Boliden Kokkola and the implications are seen as extended bed stability, increased throughput and far better on-line availability.
The development trend of the molybdenum industry in China is seen in three aspects: (1) the smelting intensity of pyrometallurgy of molybdenum will be further improved. Metallurgical equipment will develop in the direction of a large-scale and higher degree of automation. There is a possibility that the high-efficiency reactors for fluidized ...
In 1957, the splash condenser of Huludao Zinc Plant was tested successfully, and a multi-hearth furnace was modified into the first zinc concentrate bed roasting furnace of China. The number of lead and zinc smelting enterprises in China quickly increased from over 10 to over 50, and their technological capacity was enhanced.
The furnace used for roasting is a standard Wedge zinc roaster, 25 ft. (7.6 m.) outside diameter, 21 ft. (6.4 m.) inside diameter, seven roasting hearths with a total hearth area of 2350 sq. ft. (216 sq. m.). Each hearth is rabbled by two arms, carrying ten rabble blades each.
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Dead roasting for zinc sulfide Benefits • Steam or power generation without CO 2 emissions • Sulfuric acid production • Complete process value chain (roaster – gas cleaning – acid plant) from a single technology provider Features • Direct dry feeding of concentrate (with 6-12% moisture content) • Suitable for a wide range of
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The fluidized bed roaster in the zinc roasting process, namely zinc roaster, is one of the most important reactor in the zinc smelter, because its products are the raw material of downstream ...
Roaster furnace is a large-scale equipment in zinc smelting process, which plays an significant role in safety production and enviromental protection.
DOI: 10.1016/j.ifacol.2021.12.003 Corpus ID: 245585919; A novel mechanism model of the fluidized bed roaster in the zinc roasting process @article{Feng2021ANM, title={A novel mechanism model of the fluidized bed roaster in the zinc roasting process}, author={Zhenxiang Feng and Gengcheng Liu and Yong-gang Li and Hongqiu Zhu and …
Zinc Smelter Debari Overview. Debari Smelter primarily produces High-Grade (HG) zinc while also recovering cadmium as a by-product. With a zinc production capacity of 88,000 MT per annum, it achieved 82,517 MT of zinc in the financial year ending March 2023. The smelter's journey began with an initial capacity of 18,000 tonnes per annum of zinc.
Roaster furnace is a large-scale equipment in zinc smelting process, which plays an significant role in safety production and enviromental protection. ... this paper establishes a novel digital ...
Recent Process Improvements in the Kokkola Zinc Roaster. J. Nyberg, J. Nyberg. Outokumpu Zinc Oy P.O. Box 26 FIN-67101 Kokkola, Finland. Search for more papers by this author. M.-L. Metsärinta, ... Outokumpu Zinc Oy P.O. Box 26 FIN-67101 Kokkola, Finland. Search for more papers by this author. M.-L. Metsärinta,
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Sinter formation in zinc concentrate reacted at 1100°C, in labo ratory experiments to simulate. roasting, is caused by formation of a liquid phase o f Zn-S-O composition, (Shu et al. 1999 ...
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Other Forms of Fluid Bed Roasting Equipment 49 Roaster Gas Processing 51 Sulfuric Acid Production 53. Chapter 5 – Leaching and Solution Preparation 57 Purpose 57 Leaching of Calcine 57 Iron Removal 62 ... World Other China FIG1.2 - World zinc plants – capacity distribution.
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The fluidized bed roaster in the zinc roasting process, namely zinc roaster, is one of the most important reactor in the zinc smelter, because its products are the raw material of downstream processes. ... As large-scale industrial equipment, the operation stability control of the zinc roaster can improve the roasting efficiency and …
