WO2008144967A1 - Procédé pour la récupération et la production de poudre de zinc ultrafine - Google Patents

Procédé pour la récupération et la production de poudre de zinc ultrafine Download PDF

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Publication number
WO2008144967A1
WO2008144967A1 PCT/CN2007/002230 CN2007002230W WO2008144967A1 WO 2008144967 A1 WO2008144967 A1 WO 2008144967A1 CN 2007002230 W CN2007002230 W CN 2007002230W WO 2008144967 A1 WO2008144967 A1 WO 2008144967A1
Authority
WO
WIPO (PCT)
Prior art keywords
zinc
powder
solution
recovering
leaching
Prior art date
Application number
PCT/CN2007/002230
Other languages
English (en)
Chinese (zh)
Inventor
Yang Yu
Yongli Li
Guilong Li
Original Assignee
Yu, Jun
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yu, Jun filed Critical Yu, Jun
Publication of WO2008144967A1 publication Critical patent/WO2008144967A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C5/00—Electrolytic production, recovery or refining of metal powders or porous metal masses
    • C25C5/02—Electrolytic production, recovery or refining of metal powders or porous metal masses from solutions
    • 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
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
    • 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
    • C22B7/006—Wet processes
    • C22B7/008—Wet processes by an alkaline or ammoniacal leaching
    • 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
    • C22B7/02—Working-up flue dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • 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

Definitions

  • the invention relates to a preparation method of ultrafine zinc powder, in particular to a method for preparing ultrafine zinc powder by using zinc powder containing blast furnace dust or the like.
  • Ironmaking blast furnace soot is an intermediate product with low zinc content but harmful to iron making. Because it is returned to the blast furnace, it is easy to generate a furnace to cause harm to the production, and it is not only polluting the environment but also wasting resources. A variety of recycling methods have emerged for a long time. The main two categories (1) are small proportions of iron ore to recover iron, and zinc slag is discarded. (2) Roasting and volatilizing The dust is reduced at 1600 °C in a rotary kiln, and zinc is oxidized and recovered from the gas phase, and the iron slag is discarded. The above method recovers only one metal and the product is still the raw material.
  • Zinc-containing powders such as cobalt slag and molten slag in the wet zinc smelting process, zinc powder in the vertical tank zinc smelting process, blue powder, zinc powder which is not condensed into liquid zinc during electrothermal smelting, etc. , are running between 10% and 90%.
  • Patent Application Publication No. CN1817518A discloses a method for producing metal zinc powder by using zinc dust or zinc dross, leaching zinc-containing powder with a strong alkali solution, filtering and precipitating lead with sodium sulfide, etc., and then electrolytically depositing Zinc powder has many operating steps.
  • the separation of lead in zinc-containing powder can only be used as a raw material for lead smelting and cannot be directly used as a product.
  • Zinc powder is an important raw material in the metallurgy and paint industry. There are two main methods for preparing zinc powder. (1) One is to atomize the metal zinc liquid and rapidly cool it. (2) Adding metal zinc liquid Hot gas, rapid cooling. The zinc powder produced by the above method is difficult to produce a particle size of less than 47 ⁇ m, and the raw material must be metal zinc. Summary of the invention
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a method for preparing ultrafine zinc powder from a zinc-containing powder such as blast furnace dust or the like which is simple in process, convenient in operation and low in cost.
  • a method for recovering and preparing ultrafine zinc powder from a zinc-containing powder material comprising the following steps:
  • the zinc powder is dehydrated and then dried with a volatile liquid to obtain ultra-fine zinc powder of different particle size grades, and the volatile liquid is recycled and recycled;
  • a strong alkali solution having a concentration of 50 g/L or more is used as a raw material for leaching.
  • a sodium hydroxide solution having a concentration greater than or equal to 50 g/L is used as the leaching material.
  • ammonia water having a concentration greater than or equal to 10% or more is used as the leaching material.
  • the solid-liquid separation is carried out by adding a flocculant to the mixed liquid after leaching and then filtering.
  • the flocculating agent is a polyacrylamide flocculant or an inorganic flocculant.
  • the primary electrolysis voltage is 2 to 3 V and the current density is 10 to 100 A/m 2 .
  • the deep electrolytic voltage is 3 to 5 V, and the current density is 200 to 1800 A/m 2 .
  • the method of the invention not only avoids the environmental pollution problem caused by the waste of zinc-containing dust or slag, but also fully recycles and utilizes the obtained zinc powder with a particle size of not more than 47 micrometers, which is a high-quality raw material for the paint industry and the like;
  • the process conditions are easy to control, and the material input of the whole process becomes the target product or industrial raw material. There is no waste discharge, and it will not cause environmental pollution.
  • Figure 1 is a flow chart of the invention for recovering and preparing ultrafine zinc powder from a zinc-containing powder.
  • Example 1 The invention is illustrated by the following examples, but the examples do not constitute any limitation of the invention.
  • Example 1 The invention is illustrated by the following examples, but the examples do not constitute any limitation of the invention.
  • the zinc-containing powder is 100 kg of blast furnace soot.
  • the main component is: zinc 16.1% (mass percent, the same below), lead 1.13%, manganese 1.21%.
  • the powder was subjected to wet ball milling, sieved through 60 mesh, and settled to obtain 130 kg of slag, and the water was recycled.
  • the supernatant is filtered, and the filter residue is used as a smelting raw material to recover metal.
  • the obtained electrolyte is 1.
  • the positive electrical impurity metal such as lead is removed at a temperature of 2.2 volts at 20 amps/m 2 .
  • the voltage was increased to 3.2 volts to control the current density of 500 amps/m2, and after electrolysis for 2 hours, 17.40 kg of wet zinc powder was scraped off. It was washed with a volatile solvent such as absolute ethanol and dried to obtain 15.11 kg of dry zinc powder, which all passed through a 325 mesh sieve.
  • the zinc content is 99.35%, and the metal zinc content is 98.33%, which meets the standard of the first metal zinc powder.
  • the lye after electrolysis is used for deep leaching to separate the supernatant from the supernatant, and the leached mixture separates the supernatant as a leaching material for recycling, and the underflow is pressure-filtered, and the filtrate is used as a leaching material and filter residue.
  • the metal is recovered as a raw material for smelting.
  • the zinc-containing powder is 100 kg of blast furnace soot.
  • the main component is: zinc 12.1% (mass percentage, the same below), lead 1. 75%, manganese 1.93%.
  • a 20% (mass%) aqueous ammonia was used as the leaching material.
  • the procedure is similar to that of Embodiment 1.
  • the voltage is 3V
  • the current density is lOOA/m 2
  • the positive electrical impurity metal such as lead is 2.27 kg.
  • the deep electrolysis voltage was 5 V
  • the current density was 1800 A/m 2
  • the dry zinc powder was 11.08 kg.
  • the zinc powder was all passed through a 325 mesh sieve.
  • the total zinc content is 99.22%, and the metal zinc content is 97.96%, reaching the primary metal zinc powder standard.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

L'invention concerne un procédé pour la récupération et la production de poudre de zinc ultrafine à partir de poussière contenant du zinc, comprenant les étapes suivantes consistant à : ajouter de la poussière contenant du zinc dans une solution alcaline, agiter la solution à une température de 20 °C~60 °C et séparer la matière solide du liquide après avoir lixivié le zinc dans la solution ; effectuer une électrolyse primaire de la solution obtenue dans des conditions de plus faible tension et de plus faible densité de courant pour réduire les métaux dont l'électropositivité est supérieure à celle du zinc et récupérer les métaux réduits ; augmenter la tension et la densité de courant pour électrolyser intensivement la solution obtenue après l'électrolyse primaire de façon à déposer de la poudre de zinc sur la cathode et recycler la solution alcaline vers l'étape de lixiviation ; traiter avec un liquide hautement volatil la poudre de zinc obtenue pour enlever l'eau et la sécher de façon à obtenir de la poudre de zinc ultrafine pure et sèche ayant différents diamètres des particules et recycler le liquide hautement volatil ; lixivier intensivement les métaux qui n'ont pas été lixiviés par l'alcali et les récupérer en tant que matière première dans la fusion, tout en recyclant la solution de lixiviation qui a une plus faible teneur en zinc vers l'étape de lixiviation.
PCT/CN2007/002230 2007-05-29 2007-07-23 Procédé pour la récupération et la production de poudre de zinc ultrafine WO2008144967A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710074635.6 2007-05-29
CN200710074635A CN100586617C (zh) 2007-05-29 2007-05-29 从含锌粉料中回收并制取超细锌粉的方法

Publications (1)

Publication Number Publication Date
WO2008144967A1 true WO2008144967A1 (fr) 2008-12-04

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Application Number Title Priority Date Filing Date
PCT/CN2007/002230 WO2008144967A1 (fr) 2007-05-29 2007-07-23 Procédé pour la récupération et la production de poudre de zinc ultrafine

Country Status (2)

Country Link
CN (1) CN100586617C (fr)
WO (1) WO2008144967A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101698952B (zh) * 2009-10-30 2012-02-15 施熊飞 湿法制取锌粉的工艺
CN102234821A (zh) * 2010-04-26 2011-11-09 于军 从含铅锌物料中回收制备超细铅粉锌粉及纯铅锭锌锭的方法
CN102776532B (zh) * 2012-07-18 2015-02-18 同济大学 一种添加含铝化合物碱液电解制备超细锌粉的方法
CN104593602A (zh) * 2014-12-31 2015-05-06 上海第二工业大学 一种从废旧含铅玻璃碱性浸出液中提取金属铅的方法
CN107858703A (zh) * 2017-11-01 2018-03-30 四环锌锗科技股份有限公司 一种改善硫酸锌溶液电解锌质量及生产环境的电解添加剂配方及使用方法
CN109763141B (zh) * 2019-01-31 2021-02-05 白银原点科技有限公司 一种多金属浸出回收工艺

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5329121B2 (fr) * 1973-11-15 1978-08-18
CN1141956A (zh) * 1996-05-10 1997-02-05 北京有色冶金设计研究总院 一种从含锌物料中生产锌的方法
CN1341760A (zh) * 2001-08-06 2002-03-27 邵家跃 一种湿法炼锌工艺
CN1817518A (zh) * 2006-03-10 2006-08-16 同济大学 一种用锌粉尘和锌浮渣生产金属锌粉的方法
CN101012514A (zh) * 2006-12-30 2007-08-08 同济大学 一种用含铅锌废渣或氧化铅锌矿生产金属铅和锌的方法
EP1939138A1 (fr) * 2006-12-08 2008-07-02 Shell Internationale Researchmaatschappij B.V. Processus d'augmentation du rapport molaire d'hydrogène/de monoxyde de carbone dans un gaz de synthèse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5329121B2 (fr) * 1973-11-15 1978-08-18
CN1141956A (zh) * 1996-05-10 1997-02-05 北京有色冶金设计研究总院 一种从含锌物料中生产锌的方法
CN1341760A (zh) * 2001-08-06 2002-03-27 邵家跃 一种湿法炼锌工艺
CN1817518A (zh) * 2006-03-10 2006-08-16 同济大学 一种用锌粉尘和锌浮渣生产金属锌粉的方法
EP1939138A1 (fr) * 2006-12-08 2008-07-02 Shell Internationale Researchmaatschappij B.V. Processus d'augmentation du rapport molaire d'hydrogène/de monoxyde de carbone dans un gaz de synthèse
CN101012514A (zh) * 2006-12-30 2007-08-08 同济大学 一种用含铅锌废渣或氧化铅锌矿生产金属铅和锌的方法

Also Published As

Publication number Publication date
CN101314184A (zh) 2008-12-03
CN100586617C (zh) 2010-02-03

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