[go: up one dir, main page]

US20050069473A1 - Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides - Google Patents

Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides Download PDF

Info

Publication number
US20050069473A1
US20050069473A1 US10/497,133 US49713304A US2005069473A1 US 20050069473 A1 US20050069473 A1 US 20050069473A1 US 49713304 A US49713304 A US 49713304A US 2005069473 A1 US2005069473 A1 US 2005069473A1
Authority
US
United States
Prior art keywords
zinc
concentrates
ore
treatments
silicate
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US10/497,133
Other languages
English (en)
Inventor
Adelson De Souza
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VOTORANTIM METAIS ZINCO SA
Original Assignee
Companhia Mineira de Metais
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 Companhia Mineira de Metais filed Critical Companhia Mineira de Metais
Assigned to COMPANHIA MINEIRA DE METAIS reassignment COMPANHIA MINEIRA DE METAIS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DE SOUZA, ADELSON DIAS
Publication of US20050069473A1 publication Critical patent/US20050069473A1/en
Assigned to COMPANHIA PARAIBUNA DE METAIS reassignment COMPANHIA PARAIBUNA DE METAIS MERGER (SEE DOCUMENT FOR DETAILS). Assignors: COMPANHIA MINEIRA DE METAIS
Assigned to VOTORANTIM METAIS ZINCO S.A. reassignment VOTORANTIM METAIS ZINCO S.A. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: COMPANHIA PARAIBUNA DE METAIS
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/02—Roasting processes
    • 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
    • C22B19/20—Obtaining zinc otherwise than by distilling
    • C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
    • 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
    • C22B19/20—Obtaining zinc otherwise than by distilling
    • C22B19/26—Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
    • 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
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
    • 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

  • This invention aims to supply several processes of integration and unification in the treatment of zinc silicate ores and concentrates with the calcine obtained from the sulphides roasting, defined by joint or interconnected leaching of these several sources of zinc, their filtrations and joint purification of the solutions of the obtained zinc sulphate.
  • results are options of simplified processes with elevated performances of recovery of zinc, mainly from the silicate concentrates and ores (increase from 88% to 97% in zinc solution, in the treatment of the silicates).
  • the extraction of magnesium, a chemical element, with high levels in ores and zinc silicate concentrates, is obtained using the magnesium treatment system described in all integration operations.
  • the invention also includes processes for purging undesirable elements during zinc production, such as fluorides and chlorides.
  • the Petitioner has developed integration and unification processes of the treatments of concentrates or zinc silicate ore and roasted concentrates of zinc sulphides characterized by joint leaching from the many sources of zinc, its filtrations and the unique purification obtained.
  • the integration can be obtained in eight distinct processes, as follows:
  • Integration Process I shown in the blocks flowchart of FIG. 1 .
  • FIG. I shows the option of integration of the treatment processes of sulphide concentrate and silicate (or ore) zinc concentrate, where the integration or linking of the processes occurs in the Neutral Leaching stage ( 5 ).
  • the silicate cake is pre-leached ( 4 ).
  • the carbonates present in the concentrate are dissolved and the acid pulp is driven to the Neutral Leaching ( 5 ) of the calcine (arising from the Roasting of the sulphide concentrate), where it is integrated into the joint zinc extraction process of the two sources of Zinc.
  • the operational conditions, for each stage of this process are described hereinbelow:
  • Repulping Stage ( 1 ) This stage consists of the repulping of the zinc silicate concentrate with washing waters of the leaching residues, residual waters of the plant or simply industrial water.
  • the operation parameter in this phase of the process is the concentration of the solids, to be kept from 45% to 60%.
  • the repulping tank is to be coated with an anti-acid material, to resist the chemical effect, when liquids of high degree of acidity are used.
  • the spent solution arising from the stage of the zinc electrolysis is added to the ore pulp/zinc silicated concentrate, so as to maintain the pH ranging from 4.0 to 4.5.
  • Direct or indirect steam is injected in the tanks to maintain a temperature ranging from 75 to 85° C.
  • part of the magnesium and of the zinc contained in the silicate ore is added to the solution.
  • it is executed the selective precipitation of the zinc in relation to the magnesium, by adjusting the pH parameters, temperature and residence time.
  • the zinc concentrations are lesser than 10.0 g/l, it is performed the separation solid/liquid, where the liquid is sent to the stage of recuperation of zinc and the solid part to the ore's or silicates concentrate's pre-leaching stage.
  • the water balance in the plant is done by virtue of a greater or lesser amount of solution spent in this stage.
  • the balance of water in the plant is unfavorable (increase of the general volume) it is increased the amount of spent solution introduced in this stage and vice-versa, and the favorable balance of water decreases the quantity of spent solution.
  • the pH, in this stage, is kept within the range from 3.0 to 3.5, through the addition of spent solution arising from the zinc electrolysis.
  • the residence time ranges from 3 to 6 hours and varies according to the physical & chemical characteristics of the silicate that is being treated.
  • Stage of neutral leaching ( 5 )—It is in this stage that the integration of the process occurs.
  • the two ores (the silicated ore and the zinc sulphide already duly calcined) are leached together.
  • the leaching is to be performed so as to be obtained the zinc's maximum extraction and the silica coagulation, so that the obtained pulp may be decanted, filtered or centrifuged.
  • the most important to obtain a maximum extraction of zinc and coagulation of the silica were:
  • the zinc extraction efficiency in this stage is 80%.
  • the concentration of soluble silica in the industrial tests was around 60 to 80 mg/l in the zinc sulphate solution, which is sent for purification. This concentration of silica didn't harm or decrease the efficiency of the processes of solid/liquid separation of the pulp.
  • the pulp obtained in the last tank of Neutral Leaching ( 7 ) is thickened, so that an overflow be obtained, such overflow constituted of a zinc sulphate with traces of cadmium, copper, cobalt, nickel, arsenic, germanium, antimony, which goes to the stages of Purification, Electrolysis and Casting. These last phases of the process are not the subject of the Patent.
  • the underflow goes to the Acid Leaching unit ( 7 ), for leaching of the zinc ferrites from the Roaster's calcine, whose later phases are not the subjects of this Patent, as well.
  • FIG. II exhibits another option of connection of the processes of treatment of the zinc sources.
  • the interlinking occurs in the stages of Acid Leaching of the calcine ( 7 ) and/or precipitation of iron ( 11 ), instead of the stage of Neutral Leaching of the previous option.
  • the amount of concentrate or silicated ore in each stage may range from zero to one hundred percent.
  • the option to use the integration process I or II depends on:
  • Integration Process III shown in the blocks flowchart of FIG. III.
  • FIG. III presents the integrated process for the obtainment of zinc, where the silicate concentrate or ore is fully leached ( 4 ) and the obtained pulp is sent to the Neutral Leaching of the Calcine of sulphide zinc concentrate ( 5 ).
  • the silicate acid leaching ( 4 ) is made with a solution denominated leaching solution, which is a mixture of Concentrated Sulfuric Acid with spent solution from the electrolysis.
  • the concentration of acid in the leaching solution may range from 150 to 250 g/l and such variation is due to the balance of sulphate in the process.
  • the residence time ranges from 5 to 8 hours and basically depends on the efficiency of agitation in the tanks, granulometry of the ore/concentrate, temperature and the grade of the minerals contained in the source of silicate zinc.
  • the purpose of this stage is to extract the maximum possible of the zinc contained in the silicate source and the parameter to evaluate the efficiency of this stage is the content of zinc soluble in acid (zinc content not leached) discarded in the subsequent stage, which is the separation solid/liquid.
  • the value deemed optimal is ZnH+ ⁇ 0.5%.
  • the process of integration of the two plants is made through the liquid obtained in the stage of separation solid/liquid ( 14 ), which is sent to the neutral leaching ( 5 ).
  • the conditions of the neutral leaching operations are the same ones already described in the item “Integration Process I”.
  • the obtained solid residue is sent to the filtration ( 15 ) where the residue washing is accomplished to recover the soluble zinc.
  • the washing is performed in two stages, re-pulping and displacement and the soluble zinc content contained in the discarded residue is lesser than 0.5%.
  • Integration Process IV shown in the blocks flowchart of FIG. IV.
  • FIG. IV shows the integration process which has also been industrially tested and contemplates the calcination of the silicate concentrate, aiming at the decomposition of the organic substances and the carbonates contained in the concentrate.
  • the calcination may be acomplished, by using horizontal or vertical batch or continuous kiln, by using BPF oil of any type, gasogene, natural gas, coal fines, etc.
  • BPF oil of any type, gasogene, natural gas, coal fines, etc.
  • the use of the previously calcinated silicate concentrate eliminates the silicate's pre-leaching step, whose purpose was precisely to promote the decomposition of the carbonates through the chemical process.
  • FIGS. V to VIII Process for integration and removal of halogens, such as fluorides and chlorides are shown in FIGS. V to VIII, attached. They include implementing additional neutralization steps in general before filtration of the pulp leached of silicates.
  • the basis for removing fluoride is based on precipitation with lime, to form a stable compound of calcium fluoride (CaF2), with a pH of around 4.0 to 4.7. In this case, the pH control must be strict to not pass 5.0 avoiding zinc precipitation and loss of plant yields.
  • FIG. IX attached presents the comparative results of the calcination of the concentrate at 900° C. versus raw concentrate as to the parameters loss of ignition, zinc content, carbonate content and foam formation.
  • FIG. IX shows that it was possible to completely eliminate the foam with the increase of the Zn content in the concentrate, from 40% to 44% (in the calcined concentrate) and mass reduction (loss of ignition) of 20%, referring to the elimination of the carbonates ( ⁇ 0.2%) and moisture, either in bench or at industrial tests.
  • FIG. X shows the results of tests of zinc selective precipitation with silicate calcined concentrate on a zinc solution with the silicates calcined concentrate on a solution of 17 g/l of zinc and 2.1-2.4 g/l of Mg (magnesium).
  • the results demonstrate that, at temperatures of 90-95° C. and residence time of five hours, the zinc precipitates to 2.7-4.3 g/l, which represents an efficiency of about 80% for zinc precipitation (17- ⁇ fraction (4/17) ⁇ 100), and the magnesium concentration increased from 2.4 to 4.0 g/l, demonstrating an expressive capacity of magnesium purge.
  • FIG. XI shows that the calcination of the silicates concentrate drastically reduced the residence time, during the leaching, due to the reduction in the formation of foam, from 4 to 1 hour and 30 minutes. This rendered it possible to reduce the necessary volume to perform the leaching of the sources of zinc.
  • FIG. XII attached presents the results of the effect of calcination on the purification of the solutions of zinc sulphate, where there is a reduction of more than 1% in the consumption of zinc dust in relation to the cathode produced when the solution was obtained through the calcined concentrate, from 4.12to 2.95%.
  • FIG. XIII attached presents the leaching and filtration efficiency of the calcined ore of zinc sulphide where it increased from 96% to 99%, according to the results obtained with the feeding of the calcined ore/concentrate of silicates, at the end of the acid leaching or beginning of the neutralization of the iron precipitation.
  • the tests were made on benches, in volumes of 50 liters, according to the operational conditions shown in FIG. XIII.
  • FIG. XV attached presents the results of integration industrial tests where it confirms the performance of zinc selective precipitation, already shown in FIG. X.
  • This figure shows that the zinc content, in the liquid part of the solution was, generally, in an average of 5 g/l when it was used a washing solution with Zn 17-25 g/l and silicate concentrate for the selective precipitation of zinc.
  • FIG. XVI attache presents the results of industrial tests, when it was used the calcined silicate concentrate and the integration process of FIG. IV.
  • FIG. XVII attached presents the results of industrial tests to remove fluorides from solutions obtained from leaching de silicate concentrates.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
US10/497,133 2001-11-27 2002-11-07 Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides Abandoned US20050069473A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
BRPI0106186A BRPI0106186B1 (pt) 2001-11-27 2001-11-27 processos de integração dos tratamentos de concentrados ou minérios de silicatos de zinco e ustulados de zinco sulfetado, cuja integração ocorre na etapa de lixiviação neutra, e/ou na etapa de lixiviação ácida e/ou na etapa de precipitação de ferro/papagoetita
BRPI0106186-0 2001-11-27
PCT/BR2002/000149 WO2003046232A1 (fr) 2001-11-27 2002-11-07 Processus d'integration pour le traitement de concentres de silicate de zinc ou de minerai de silicate de zinc et concentres grilles de sulfures de zinc

Publications (1)

Publication Number Publication Date
US20050069473A1 true US20050069473A1 (en) 2005-03-31

Family

ID=3948175

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/497,133 Abandoned US20050069473A1 (en) 2001-11-27 2002-11-07 Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides

Country Status (6)

Country Link
US (1) US20050069473A1 (fr)
CN (1) CN1571853B (fr)
AU (1) AU2002336830B2 (fr)
BR (1) BRPI0106186B1 (fr)
WO (1) WO2003046232A1 (fr)
ZA (1) ZA200304930B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014000021A1 (fr) * 2012-06-26 2014-01-03 Metaleach Limited Procédé de lixiviation de minerais de silicate de zinc
CN109097557A (zh) * 2018-08-03 2018-12-28 中南大学 一种从硅锌矿资源中回收锌的方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110129560B (zh) * 2019-06-19 2021-05-11 个旧兴华锌业有限公司 高硅氧化锌矿与高杂质次氧化锌粉联合提锌锭工艺
CN110560070B (zh) * 2019-08-09 2020-09-25 红河学院 一种用含铁废料制备掺杂纳米铁酸锌的方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120353A (en) * 1990-02-16 1992-06-09 Outokumpu Oy Hydrometallurgic method for processing raw materials containing zinc sulphide
US5585079A (en) * 1993-06-24 1996-12-17 Outokumpu Engineering Contracters Oy Method for leaching material containing zinc oxide and zinc silicate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB145085A (en) * 1920-06-17 1921-09-01 Metallbank & Metallurg Ges Ag Process for treating sal ammoniac skimmings
CN1030258A (zh) * 1988-02-10 1989-01-11 昆明冶金研究所 硅酸锌矿的处理方法
BRPI9904195A2 (pt) * 1999-02-05 2016-09-27 Companhia Mineira De Metais processos de integração dos tratamentos de concentrados, ou minérios, de silicatos de zinco e ustulados de zinco sulfetados

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120353A (en) * 1990-02-16 1992-06-09 Outokumpu Oy Hydrometallurgic method for processing raw materials containing zinc sulphide
US5585079A (en) * 1993-06-24 1996-12-17 Outokumpu Engineering Contracters Oy Method for leaching material containing zinc oxide and zinc silicate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014000021A1 (fr) * 2012-06-26 2014-01-03 Metaleach Limited Procédé de lixiviation de minerais de silicate de zinc
CN109097557A (zh) * 2018-08-03 2018-12-28 中南大学 一种从硅锌矿资源中回收锌的方法

Also Published As

Publication number Publication date
HK1071169A1 (en) 2005-07-08
AU2002336830A1 (en) 2003-06-10
BR0106186A (pt) 2003-09-23
WO2003046232A1 (fr) 2003-06-05
BRPI0106186B1 (pt) 2017-04-25
CN1571853B (zh) 2010-05-26
ZA200304930B (en) 2004-08-25
CN1571853A (zh) 2005-01-26
AU2002336830B2 (en) 2007-03-22

Similar Documents

Publication Publication Date Title
RU2023728C1 (ru) Способ извлечения цинка, меди, свинца и серебра из цинкжелезосодержащего сульфидного сырья
CA2437549C (fr) Production d'oxyde de zinc a partir de concentres de sulfure complexe par traitement au chlore
CN107208185A (zh) 钪的回收方法
CN111647754A (zh) 一种钢铁厂含锌尘泥的综合利用方法
AU780362B2 (en) Process for electrolytic production of highly pure zinc or zinc compounds from primary and secondary zinc raw materials
US4305914A (en) Process for precipitating iron as jarosite with a low non-ferrous metal content
JPH0625763A (ja) 製錬中間産物の処理方法
AU2002336830B2 (en) Integration processes of the treatments of zinc silicate concentrates or zinc silicate ore and roasted concentrates of zinc sulphides
US8974753B2 (en) Precipitation of zinc from solution
WO2005012582A1 (fr) Traitement hydrometallurgique ameliore de materiaux contenant du manganese
US4435368A (en) Hydrometallurgical process for selective dissolution of mixtures of oxy compounds
WO2000046412A1 (fr) Procedes pour integrer les differents traitements de concentres ou de minerais de silicates de zinc et de concentres grilles de sulfures de zinc
EP3074545A1 (fr) Procédé et agencement permettant de séparer l'arsenic de matières premières
CA1094973A (fr) Extraction du cobalt dans une solution d'electrolyte de zinc, au moyen de zinc en poussiere et d'arsenate de cuivre
AU2010217184A1 (en) Zinc oxide purification
CN113136488B (zh) 一种湿法炼锌中铁矾渣的湿法处理工艺
US4049514A (en) Zinc hydrometallurgical process
US7615100B2 (en) Method for the precipation of silica in connection with zinc ore leaching
CN103643036A (zh) 一种热压选择性浸出处理含铁铟锌焙砂的方法
CN109913647A (zh) 一种回收铋中矿中铜、锌的湿法处理方法
WO2015092150A1 (fr) Procédé et agencement de processus pour séparer l'indium et l'arsenic l'un de l'autre
CN113637856A (zh) 一种从锌冶炼过程中分离富集砷的工艺
KR20170133494A (ko) 철-함유 슬러지의 처리 방법
HK1071169B (en) Integration processes of the treatments of zinc silicate concentrates or zinc silicates ore and roasted concentrates of zinc sulphides
AU2004260809B2 (en) Improved hydrometallurgical processing of manganese containing materials

Legal Events

Date Code Title Description
AS Assignment

Owner name: COMPANHIA MINEIRA DE METAIS, BRAZIL

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DE SOUZA, ADELSON DIAS;REEL/FRAME:016118/0141

Effective date: 20041027

AS Assignment

Owner name: VOTORANTIM METAIS ZINCO S.A., BRAZIL

Free format text: CHANGE OF NAME;ASSIGNOR:COMPANHIA PARAIBUNA DE METAIS;REEL/FRAME:021439/0369

Effective date: 20050502

Owner name: COMPANHIA PARAIBUNA DE METAIS, BRAZIL

Free format text: MERGER;ASSIGNOR:COMPANHIA MINEIRA DE METAIS;REEL/FRAME:021439/0298

Effective date: 20050415

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION