RU2382091C1 - Reprocessing method of zinc concentrate - Google Patents

Reprocessing method of zinc concentrate Download PDF

Info

Publication number
RU2382091C1
RU2382091C1 RU2008145262/02A RU2008145262A RU2382091C1 RU 2382091 C1 RU2382091 C1 RU 2382091C1 RU 2008145262/02 A RU2008145262/02 A RU 2008145262/02A RU 2008145262 A RU2008145262 A RU 2008145262A RU 2382091 C1 RU2382091 C1 RU 2382091C1
Authority
RU
Russia
Prior art keywords
oxide
zinc
copper
solution
hydroxide
Prior art date
Application number
RU2008145262/02A
Other languages
Russian (ru)
Inventor
Артем Андреевич Андреев (RU)
Артем Андреевич Андреев
Александр Николаевич Дьяченко (RU)
Александр Николаевич Дьяченко
Роман Иванович Крайденко (RU)
Роман Иванович Крайденко
Original Assignee
Государственное образовательное учреждение высшего профессионального образования Томский политехнический университет
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 Государственное образовательное учреждение высшего профессионального образования Томский политехнический университет filed Critical Государственное образовательное учреждение высшего профессионального образования Томский политехнический университет
Priority to RU2008145262/02A priority Critical patent/RU2382091C1/en
Application granted granted Critical
Publication of RU2382091C1 publication Critical patent/RU2382091C1/en

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

FIELD: metallurgy.
SUBSTANCE: method includes blending of concentrate with solid sal ammoniac in portions 100-140% molal from stochiometric amount. The it is implemented heating at temperature 200-320°C and leaching by water with transformation into soldering acid, iron, copper and separation of silicon oxide. Additionally value of pH of solution is developed up to 3. By filtration it is separated ferric hydroxide and is baked up to receiving of ferric oxide. Into the rest solution it is added lack of ammonia water in ratio 70-90% molal from stochiometric amount. By filtration it is separated zinc hydroxide and is burnt up to receiving of zinc oxide. The rest solution is boiled. Then by filtration it is separated copper hydroxide and is burnt up to receiving of copper oxide.
EFFECT: receiving of ferric oxide, copper oxide and zinc oxide, cleaned from admixtures.
2 ex

Description

The invention relates to the field of chemical technology of inorganic substances and can be used in cases where it is necessary to isolate and separate the oxides of zinc, iron and copper.
A known method of producing zinc oxide by roasting a zinc concentrate, followed by blowing it with air at 1200 ° C and trapping pulverized zinc oxide in special filters [Chemical encyclopedia: 5 tons: so 5 / Red - col .: Zefirov N.S. (Ch. ed.) and others. - M .: Sov. encycl., 1998 .-- 783 p. (The article "Zinc oxide" on page 380)]. The disadvantage of this method is the complexity of the hardware design of the process, the contamination of the final product with lead oxide.
A known method of producing zinc oxide by thermal decomposition of oxidized zinc ores at 1300 ° C in a mixture with coal, followed by oxidation of zinc vapors with air oxygen [Akhmetov TG, Porfiryeva RT, Gaysin LG, Khatsrinov AI "Chemical technology of inorganic substances." In 2 book Prince 2. - M .: "Higher School". 2002 .-- 427 p. (Article “Zinc Oxide and Hydroxide” on page 203)]. The disadvantage of this method is the high temperature of the process.
A known method (prototype) for the production of zinc oxide, including processing zinc-containing raw materials with a solution of ammonium chloride at elevated temperatures, with the formation of a solution containing zinc, lead and cadmium; adding metallic zinc to the solution with the deposition of metallic lead and cadmium on it; and lowering the temperature of the solution with the deposition of zinc oxide, followed by washing it from impurities [RU 2119542]. The disadvantage of this method is the use of the expensive stage of deposition of lead and cadmium, requiring subsequent processing of the resulting product.
An object of the present invention is to provide an industrial process for processing zinc concentrate.
The problem is achieved by mixing zinc concentrate (ZnO 69%, FeO 15%, SiO 2 5%. CuO 3%, the remainder is moisture) and excess, 100-140% of the stoichiometric ratio, solid ammonium chloride, the mixture is heated at 200 -320 ° C.
The proceeding reactions are described by the equations:
ZnO + 2NH 4 Cl = ZnCl 2 + 2NH 3 + H 2 O;
FeO + 2NH 4 Cl = FeCl 2 + 2NH 3 + H 2 O;
CuO + 2NH 4 Cl = CuCl 2 + 2NH 3 + H 2 O;
SiO 2 + NH 4 Cl ≠
Silicon oxide does not interact with ammonium chloride under these conditions. The resulting mixture is subjected to water leaching to be converted into a solution of zinc, iron and copper chlorides; insoluble silica is separated by filtration.
Ammonia water is added to the solution of zinc, iron and copper chlorides, bringing the pH of the solution to 3. As a result of the reaction
FeCl 2 + 2NH 4 OH = Fe (OH) 2 + 2NH 4 Cl
solid iron hydroxide is formed, which is separated by filtration and calcined to oxide. The solution is purified from the iron compound.
When a deficiency (70-90% of stoichiometric) ammonia water is added to the solution containing zinc and copper chlorides, zinc hydroxide precipitates from the solution, which is filtered and calcined to obtain zinc oxide. The solution containing copper ammonia and ammonium chloride is boiled until the destruction of copper ammonia, which is filtered as a hydroxide and calcined to obtain copper oxide. The remaining solution is evaporated to obtain ammonium chloride, which can be used to open the next batch of raw materials.
As a result of these operations, three products are obtained: iron oxide, copper oxide and zinc oxide, purified from impurities.
Example 1
Zinc concentrate containing zinc oxide 6.9 g, iron oxide 1.5 g, silicon oxide 0.5 g and copper oxide 0.3 g, are mixed with 15 g of ammonium chloride and heated to a temperature of 320 ° C. Stand for 0.5 hours. The mixture is subjected to water leaching, metal chlorides dissolve; silica is separated by filtration. The pH of the solution was adjusted to 3, iron hydroxide was isolated in solid form, which was separated by filtration and calcined to iron oxide. The mass of iron oxide was 1.38 g. 10 g of ammonia water (25% ammonia content) was added to the solution. As a result of the reaction, solid zinc hydroxide precipitates, which is filtered off, calcined, the mass of the obtained zinc oxide is 6.8 g. The remaining solution is boiled until copper ammonia is destroyed, the solid fraction is filtered off, calcined, the mass of the obtained copper oxide is 0.26 g.
Example 2
It differs from example 1 in that the reaction is carried out under isochoric conditions (in an autoclave) at a temperature of 320 ° C. This reduces the loss of ammonium chloride due to evaporation and desublimation and increases the speed of the process. The mass of the obtained iron oxide was 1.42 g, the mass of the obtained zinc oxide was 6.83 g, the mass of the obtained copper oxide was 0.27 g.

Claims (1)

  1. A method of processing a zinc concentrate containing oxides of silicon, iron, copper, which consists in the fact that the concentrate is mixed with solid ammonium chloride in proportions of 100-140 mol.% Of the stoichiometric amount, heated at a temperature of 200-320 ° C and leached with water into a solution of zinc, iron, copper chloride and separation of silicon oxide, the pH of the solution is adjusted to 3, iron hydroxide is filtered and calcined to obtain iron oxide, a lack of ammonia water in the proportion of 70-90 mol.% from stoichio is added to the remaining solution etricheskogo amount filtration zinc hydroxide is separated and calcined to produce zinc oxide, the remaining solution is boiled, separated by filtration and cupric hydroxide is calcined to produce copper oxide.
RU2008145262/02A 2008-11-17 2008-11-17 Reprocessing method of zinc concentrate RU2382091C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2008145262/02A RU2382091C1 (en) 2008-11-17 2008-11-17 Reprocessing method of zinc concentrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2008145262/02A RU2382091C1 (en) 2008-11-17 2008-11-17 Reprocessing method of zinc concentrate

Publications (1)

Publication Number Publication Date
RU2382091C1 true RU2382091C1 (en) 2010-02-20

Family

ID=42127033

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2008145262/02A RU2382091C1 (en) 2008-11-17 2008-11-17 Reprocessing method of zinc concentrate

Country Status (1)

Country Link
RU (1) RU2382091C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106191463A (en) * 2016-07-15 2016-12-07 深圳市危险废物处理站有限公司 A kind of purification method of zinc hydrometallurgy leachate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106191463A (en) * 2016-07-15 2016-12-07 深圳市危险废物处理站有限公司 A kind of purification method of zinc hydrometallurgy leachate

Similar Documents

Publication Publication Date Title
AU2012306934B2 (en) Comprehensive recovery method for complex material containing arsenic and valuable metal slags
CN100558918C (en) From solution, reclaim the method for precious metals and arsenic
Hoffmann Recovering selenium and tellurium from copper refinery slimes
Multani et al. Antimony in the metallurgical industry: A review of its chemistry and environmental stabilization options
JP5739350B2 (en) How to remove arsenic as scorodite
US8747787B2 (en) Method for producing raw material for ferronickel smelting from low grade nickel oxide ore
US8882882B2 (en) Method of manufacturing Fe and Ni containing material and cobalt containing material using recycling residue of spent catalyst and method of manufacturing raw material for stainless using the Fe and Ni containing material and method of manufacturing Fe-Ni alloy
CN1938436B (en) Recovery of metals from oxidised metalliferous materials
TWI316557B (en)
CN100595297C (en) Gold extraction process with low pollution and high recovery for refractory gold concentrate
CN100567524C (en) Be used for handling the electric furnace and the dust of other stove and the technology of residue that contain zinc oxide and franklinite
US4988487A (en) Process for recovering metal values such as scandium, iron and manganese from an industrial waste sludge
CN101591733B (en) Method for jarosite precipitation and deironization by pressure acid leaching of high-iron zinc-sulphide concentrate in kettle
CN102747226B (en) Method for treating zinc hydrometallurgy waste residue by using alkali ammonium sulfur coupling method
CN106756113B (en) A kind of method that arsenic sulfide slag reduction sulphur fixing roast directly produces metallic arsenic
US4252777A (en) Recovery of aluminum and other metal values from fly ash
CN101559964B (en) Preparation method of platy strontium carbonate particles
RU2333972C2 (en) Nickel recovery and cobalt from laterite ore
US20120328494A1 (en) Method for recovering indium, silver, gold and rare, precious and base metals from complex oxide and sulfide ores
CN108611494B (en) Method for recycling arsenic alkali residue efficiently and comprehensively
KR100811872B1 (en) Method of manufacturing raw material for stainless melting using feni containing sludge
AU2008276969A1 (en) Method of treating arsenical matter with alkali
US4158041A (en) Separation of ilmenite and rutile
RU2365649C1 (en) Method of recovery of vanadium from titanium-vanadium slag
CN101230419A (en) Method for extracting vanadium pentoxide and comprehensively extracting ammonium alum and iron-oxide red from vanadium-containing stone coal or vanadium-containing ash slag

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20101118