CN105642447B - Zinc oxide ore flotation agent and preparation method thereof - Google Patents

Zinc oxide ore flotation agent and preparation method thereof Download PDF

Info

Publication number
CN105642447B
CN105642447B CN201610086691.0A CN201610086691A CN105642447B CN 105642447 B CN105642447 B CN 105642447B CN 201610086691 A CN201610086691 A CN 201610086691A CN 105642447 B CN105642447 B CN 105642447B
Authority
CN
China
Prior art keywords
agent
collecting
mass ratio
zinc oxide
oxide ore
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.)
Active
Application number
CN201610086691.0A
Other languages
Chinese (zh)
Other versions
CN105642447A (en
Inventor
谢巧玲
帅和平
陈福明
张西明
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.)
SHENZHEN RUN SUN CHEMICAL TECHNOLOGY Co Ltd
Shenzhen Research Institute Tsinghua University
Original Assignee
SHENZHEN RUN SUN CHEMICAL TECHNOLOGY Co Ltd
Shenzhen Research Institute Tsinghua University
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 SHENZHEN RUN SUN CHEMICAL TECHNOLOGY Co Ltd, Shenzhen Research Institute Tsinghua University filed Critical SHENZHEN RUN SUN CHEMICAL TECHNOLOGY Co Ltd
Priority to CN201610086691.0A priority Critical patent/CN105642447B/en
Publication of CN105642447A publication Critical patent/CN105642447A/en
Application granted granted Critical
Publication of CN105642447B publication Critical patent/CN105642447B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00Flotation
    • B03D1/001Flotation agents
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B03SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03DFLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D2203/00Specified materials treated by the flotation agents; specified applications
    • B03D2203/02Ores

Landscapes

  • Physical Water Treatments (AREA)
  • Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The present invention proposes a kind of zinc oxide ore flotation agent, including following components composition:The mass ratio of collecting agent, foaming agent and emulsifying agent, the foaming agent and the collecting agent is 1:6‑1:1, the mass ratio of the emulsifying agent and the collecting agent is 1:6‑1:1.Preparation method is:1) foaming agent is added in collecting agent, dissolves and stir evenly at 25 80 DEG C, the mass ratio of the foaming agent and the collecting agent is 1:6‑1:1;2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 0.1 10%;3) emulsifying agent is added into the solution of step 2) so that collecting agent can be fully emulsified in aqueous with foaming agent, and the mass ratio of the emulsifying agent and the collecting agent is 1:6‑1:1.Flotation agent of the present invention has the advantages that flotation effect is good, and good water solubility, dispersibility is strong, and cost is low, and the rate of recovery is high.

Description

Zinc oxide ore flotation agent and preparation method thereof
Technical field
The invention belongs to flotation agent technical field, and in particular to a kind of zinc oxide ore flotation agent and preparation method thereof.
Background technology
The exploitation of China's zinc resource also faces following two large problems.Problem one, the self-produced zinc concentrate in China can not at present Meet demand, needs a large amount of Import Zinc Concentrates every year;Problem two, the sulphide ore that China's overwhelming majority is verified or are being developed Utilize, reserved resources extremely lack.Exploitation thus to Refractory ore production resource is extremely urgent.
Floatation is to handle a kind of important method of zinc oxide ore.Conventional method for floating uses primary amine class after mainly vulcanizing Collecting agent collecting, but since zinc oxide ore is usually lead zinc mineral intergrowth, its mineral species is various, mutually adulterates association, embedding cloth Granularity is thinner, and argillization is serious, and soluble-salt content is high, thus conventional flotation difficulty is larger.Therefore, to zinc oxide ore flotation Research.Can the research application especially to floating agent is directly related to oxidase complex zinc resource effective exploitation utilization.
The medicament research for zinc oxide ore flotation has focused largely on new and effective collecting agent both at home and abroad, activator is ground In terms of hair and application study, the particularly research to collecting agent is more, but the research to emulsifying agent and foaming agent is less.This Reflect the direction of zinc oxide ore floating agent future studies.
Due to the most complicated component of zinc oxide ore, oxygenation efficiency it is high, containing big, the ore dressing that more than mud etc., result in its ore dressing difficulty The rate of recovery is low, many achievements also because technology or it is economical the reason for fail generally to put into industrial production, not yet bring direct warp Ji benefit.Therefore, oxidation reinforced zinc ore floating is theoretical and sulfidation invigoration effect and mechanism study, develop efficient new drug and Combination medicament, is of great significance for reducing the beneficiation cost of zinc oxide ore, improving comprehensive resource utilization rate tool.
The content of the invention
To solve the problems, such as that flotation effect existing for existing zinc oxide ore flotation agent is poor, the present invention proposes a kind of zinc oxide ore Flotation agent, has the advantages that flotation effect is good, and good water solubility, dispersibility is strong, and cost is low, and the rate of recovery is high.
The technical proposal of the invention is realized in this way:
A kind of zinc oxide ore flotation agent, including following components composition:Collecting agent, foaming agent and emulsifying agent, the foaming agent Mass ratio with the collecting agent is 1:6-1:1, the mass ratio of the emulsifying agent and the collecting agent is 1:6-1:1.
Further, one kind in aminated compounds, yellow pharmaceutical compound and chelating class compound of the collecting agent or Two kinds of person.
Further, the aminated compounds is primary amine salt, secondary ammonium salt, tertiary amine salt, quaternary ammonium salt, fatty amine, aromatic amine or ether Amine, the Huang pharmaceutical compound be ethyl xanthate, butyl xanthate or amyl group xanthate, and the chelating class compound is alkyl the third two Acids, α-oximido dialkyl alkylphosphonate class or octyl group hydroximic acid.
Further, the foaming agent is camphorated oil, eucalyptus oil, heavy oil, diesel oil, kerosene, terpenic oil, cresotinic acid and higher alcohol One or both of class.
Further, the emulsifying agent is fatty acid soaps, alkyl sulfate, alkylbenzenesulfonate, phosphate, N- dodecyls In dimethylamine and its amine derivative, quaternary ammonium salt, polyoxyethylene ether, polyethenoxy ether, polyol fatty acid ester and polyvinyl alcohol It is one or two kinds of.
It is a further object to provide a kind of preparation method of zinc oxide ore flotation agent, comprise the following steps:
1) foaming agent is added in collecting agent, dissolves and stir evenly at 25-80 DEG C, the foaming agent with it is described The mass ratio of collecting agent is 1:6-1:1;
2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 0.1-10%;
3) emulsifying agent is added into the solution of step 2) so that collecting agent can be fully newborn in aqueous with foaming agent Change, the mass ratio of the emulsifying agent and the collecting agent is 1:6-1:1.
Further, the collecting agent be selected from primary amine salt, secondary ammonium salt, tertiary amine salt, quaternary ammonium salt, fatty amine, aromatic amine, ether amines, In ethyl xanthate, butyl xanthate, amyl group xanthate, alkyl malonic acid class, α-oximido dialkyl alkylphosphonate class or octyl group hydroximic acid Two kinds, the mass ratio of two kinds of collecting agents is 6 in the step 1):1-1:6.
Further, the foaming agent is camphorated oil, eucalyptus oil, heavy oil, diesel oil, kerosene, terpenic oil, cresotinic acid and higher alcohol Two kinds in class, the mass ratio of two kinds of foaming agents in the step 1) is 1:3-3:1.
Further, the emulsifying agent is fatty acid soaps, alkyl sulfate, alkylbenzenesulfonate, phosphate, N- dodecyls In dimethylamine and its amine derivative, quaternary ammonium salt, polyoxyethylene ether, polyethenoxy ether, polyol fatty acid ester and polyvinyl alcohol Two kinds, the mass ratio of two kinds of emulsifying agents in the step 3) is 1:3-3:1.
Novel oxidized zinc ore floating agent provided by the invention is good with flotation effect, and good water solubility, dispersibility is strong, cost It is low, the advantages that rate of recovery is high.
Embodiment
Embodiment 1
A kind of zinc oxide ore flotation agent, including following components composition:Collecting agent, foaming agent and emulsifying agent, the foaming agent Mass ratio with the collecting agent is 1:4, the mass ratio of the emulsifying agent and the collecting agent is 1:5.Collecting agent is primary amine salt With alkyl malonic acid class.Foaming agent is camphorated oil and eucalyptus oil.Emulsifying agent is fatty acid soaps and alkyl sulfate.
A kind of preparation method of zinc oxide ore flotation agent, comprises the following steps:
1) collecting agent is primary amine salt and alkyl malonic acid class, its mass ratio 5:1, it is sufficiently mixed uniformly;Foaming agent is camphor Oil and eucalyptus oil, its mass ratio are 3:1, foaming agent is added to collecting agent dissolving at 30 DEG C and is stirred evenly, described The mass ratio of infusion and the collecting agent is 1:4;
2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 2%;
3) emulsifying agent is fatty acid soaps and alkyl sulfate, its mass ratio is 3:1, emulsification is added into the solution of step 2) Agent so that collecting agent can be fully emulsified in aqueous with foaming agent, and the mass ratio of the emulsifying agent and the collecting agent is 1:5。
Embodiment 2
A kind of zinc oxide ore flotation agent, including following components composition:Collecting agent, foaming agent and emulsifying agent, the foaming agent Mass ratio with the collecting agent is 1:6, the mass ratio of the emulsifying agent and the collecting agent is 1:1.Collecting agent is secondary ammonium salt With butyl xanthate.Foaming agent is kerosene and diesel oil.Emulsifying agent is polyoxyethylene ether and polyethenoxy ether.
A kind of preparation method of zinc oxide ore flotation agent, comprises the following steps:
1) collecting agent is secondary ammonium salt and butyl xanthate, its mass ratio 6:1, it is sufficiently mixed uniformly;Foaming agent is kerosene and bavin Oil, its mass ratio are 2:1, foaming agent is added to collecting agent dissolving at 50 DEG C and is stirred evenly, the foaming agent and institute The mass ratio for stating collecting agent is 1:6;
2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 3%;
3) emulsifying agent is polyoxyethylene ether and polyethenoxy ether, its mass ratio is 2:1, breast is added into the solution of step 2) Agent so that collecting agent can be fully emulsified in aqueous with foaming agent, the mass ratio of the emulsifying agent and the collecting agent For 1:1.
Embodiment 3
A kind of zinc oxide ore flotation agent, including following components composition:Collecting agent, foaming agent and emulsifying agent, the foaming agent Mass ratio with the collecting agent is 1:1, the mass ratio of the emulsifying agent and the collecting agent is 1:6.Collecting agent is primary amine salt With octyl group hydroximic acid.Foaming agent is camphorated oil and kerosene.Emulsifying agent is fatty acid soaps and polyethenoxy ether.
A kind of preparation method of zinc oxide ore flotation agent, comprises the following steps:
1) collecting agent is primary amine salt and octyl group hydroximic acid, its mass ratio 1:6, it is sufficiently mixed uniformly;Foaming agent is camphor Oil and kerosene, its mass ratio are 2:1.5, foaming agent is added to collecting agent dissolving at 60 DEG C and is stirred evenly, described The mass ratio of infusion and the collecting agent is 1:1;
2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 5%;
3) emulsifying agent is fatty acid soaps and polyethenoxy ether, its mass ratio is 2:1.5, breast is added into the solution of step 2) Agent so that collecting agent can be fully emulsified in aqueous with foaming agent, the mass ratio of the emulsifying agent and the collecting agent For 1:6.
Embodiment 4
A kind of zinc oxide ore flotation agent, including following components composition:Collecting agent, foaming agent and emulsifying agent, the foaming agent Mass ratio with the collecting agent is 1:3, the mass ratio of the emulsifying agent and the collecting agent is 1:3.Collecting agent is fatty amine With butyl xanthate class.Foaming agent is terpenic oil and higher alcohols.Emulsifying agent is alkyl sulfate and alkylbenzenesulfonate.
A kind of preparation method of zinc oxide ore flotation agent, comprises the following steps:
1) collecting agent is fatty amine and butyl xanthate class, its mass ratio 1:4, it is sufficiently mixed uniformly;Foaming agent is terpenic oil With higher alcohols, its mass ratio is 1:1, foaming agent is added to collecting agent dissolving at 60 DEG C and is stirred evenly, described The mass ratio of infusion and the collecting agent is 1:3;
2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 3%;
3) emulsifying agent is alkyl sulfate and alkylbenzenesulfonate, its mass ratio is 1:1, added into the solution of step 2) Emulsifying agent so that collecting agent can be fully emulsified in aqueous with foaming agent, the quality of the emulsifying agent and the collecting agent Than for 1:3.
Embodiment 5
A kind of zinc oxide ore flotation agent, including following components composition:Collecting agent, foaming agent and emulsifying agent, the foaming agent Mass ratio with the collecting agent is 1:4, the mass ratio of the emulsifying agent and the collecting agent is 1:4.Collecting agent is primary amine salt With butyl xanthate.Foaming agent is terpenic oil and cresotinic acid.Emulsifying agent is alkyl sulfate and alkylbenzenesulfonate.
A kind of preparation method of zinc oxide ore flotation agent, comprises the following steps:
1) collecting agent is primary amine salt and butyl xanthate class, its mass ratio 1:3, it is sufficiently mixed uniformly;Foaming agent is terpenic oil With higher alcohols, its mass ratio is 2:1, foaming agent is added to collecting agent dissolving at 25 DEG C and is stirred evenly, described The mass ratio of infusion and the collecting agent is 1:4;
2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 2.5%;
3) emulsifying agent is alkyl sulfate and alkylbenzenesulfonate, its mass ratio is 2:1, added into the solution of step 2) Emulsifying agent so that collecting agent can be fully emulsified in aqueous with foaming agent, the quality of the emulsifying agent and the collecting agent Than for 1:4.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.

Claims (4)

1. a kind of preparation method of zinc oxide ore flotation agent, it is characterised in that comprise the following steps:
1) foaming agent is added in collecting agent, dissolves and stir evenly at 25-80 DEG C, the foaming agent and the collecting The mass ratio of agent is 1:6-1:1;
2) mixture after step 1) is mixed adds suitable quantity of water, is configured to the solution that mass concentration is 0.1-10%;
3) emulsifying agent is added into the solution of step 2) so that collecting agent can be fully emulsified in aqueous with foaming agent, institute The mass ratio for stating emulsifying agent and the collecting agent is 1:6-1:1.
2. the preparation method of zinc oxide ore flotation agent according to claim 1, it is characterised in that the collecting agent is selected from primary Amine salt, secondary ammonium salt, tertiary amine salt, quaternary ammonium salt, fatty amine, aromatic amine, ether amines, ethyl xanthate, butyl xanthate, amyl group xanthate, alkyl Two kinds in malonic acid class, α-oximido dialkyl alkylphosphonate class or octyl group hydroximic acid, two kinds of collecting agents in the step 1) Mass ratio is 6:1-1:6.
3. the preparation method of zinc oxide ore flotation agent according to claim 1 or 2, it is characterised in that the foaming agent is Two kinds in camphorated oil, eucalyptus oil, heavy oil, diesel oil, kerosene, terpenic oil, cresotinic acid and higher alcohols, two in the step 1) The mass ratio of kind foaming agent is 1:3-3:1.
4. the preparation method of zinc oxide ore flotation agent according to claim 1 or 2, it is characterised in that the emulsifying agent is Fatty acid soaps, alkyl sulfate, alkylbenzenesulfonate, phosphate, N- domiphens and its amine derivative, quaternary ammonium salt, Two kinds in polyoxyethylene ether, polyethenoxy ether, polyol fatty acid ester and polyvinyl alcohol, two kinds of emulsifications in the step 3) The mass ratio of agent is 1:3-3:1.
CN201610086691.0A 2016-02-15 2016-02-15 Zinc oxide ore flotation agent and preparation method thereof Active CN105642447B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610086691.0A CN105642447B (en) 2016-02-15 2016-02-15 Zinc oxide ore flotation agent and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610086691.0A CN105642447B (en) 2016-02-15 2016-02-15 Zinc oxide ore flotation agent and preparation method thereof

Publications (2)

Publication Number Publication Date
CN105642447A CN105642447A (en) 2016-06-08
CN105642447B true CN105642447B (en) 2018-04-17

Family

ID=56488426

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610086691.0A Active CN105642447B (en) 2016-02-15 2016-02-15 Zinc oxide ore flotation agent and preparation method thereof

Country Status (1)

Country Link
CN (1) CN105642447B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108889453A (en) * 2018-04-28 2018-11-27 昆明理工大学 A kind of combination medicament and its application method for zinc-containing ores flotation
CN110142144A (en) * 2019-06-03 2019-08-20 云南金鼎锌业有限公司 The method that low-grade difficulty selects Flotation of Zinc Oxide in oxysulphied lead-zinc ore tailings
CN110152889A (en) * 2019-06-04 2019-08-23 瓮福(集团)有限责任公司 A kind of silicon calcium quality ore Counterfloatating desiliconization removal of impurities combined capturing and collecting agent and its preparation method and application
CN110876987B (en) * 2019-12-05 2021-09-03 西南科技大学 Synchronous enhancer for efficient flotation and separation of refractory zinc oxide ore and preparation and application thereof
CN111266195B (en) * 2020-03-05 2021-09-07 中南大学 Zinc oxide ore flotation combined collecting agent and application thereof
CN111530633A (en) * 2020-04-27 2020-08-14 西部矿业股份有限公司 Novel composite collecting agent for recovering zinc oxide from peat plaza lead zinc oxide ore, preparation method and application
CN112371348B (en) * 2020-12-15 2022-04-26 武汉工程大学 Lead-zinc sulfide ore flotation separation inhibitor and application method thereof
CN113843050B (en) * 2021-10-11 2023-02-28 内蒙古宏鉮科技发展有限责任公司 Iron ore dressing method for bayan obo iron-containing surrounding rock
CN113976326B (en) * 2021-10-27 2023-12-19 江西理工大学 Flotation separation agent for mud-containing zinc oxide ore and flotation separation process thereof
CN114798181B (en) * 2022-04-27 2024-03-26 矿冶科技集团有限公司 Flotation foaming agent for minerals containing easy-to-float gangue and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640382A (en) * 1970-02-04 1972-02-08 Basic Inc Flotation concentration of magnesite with emulsified collector reagents
CN1820853A (en) * 2006-02-09 2006-08-23 陈铁 Beneficiation method for zinc oxide mine
CN103447156A (en) * 2012-06-01 2013-12-18 云南中林地质勘察设计有限公司 Preparation and application method of emulsion collectors for lead-zinc oxide ore difficult in selection
CN103506225A (en) * 2013-09-16 2014-01-15 四川晶大矿业科技有限公司 Zinc oxide mineral beneficiation collecting agent and preparation method of zinc oxide mineral beneficiation collecting agent
CN104768653A (en) * 2012-11-28 2015-07-08 埃科莱布美国股份有限公司 Composition and method for improvement in froth flotation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3640382A (en) * 1970-02-04 1972-02-08 Basic Inc Flotation concentration of magnesite with emulsified collector reagents
CN1820853A (en) * 2006-02-09 2006-08-23 陈铁 Beneficiation method for zinc oxide mine
CN103447156A (en) * 2012-06-01 2013-12-18 云南中林地质勘察设计有限公司 Preparation and application method of emulsion collectors for lead-zinc oxide ore difficult in selection
CN104768653A (en) * 2012-11-28 2015-07-08 埃科莱布美国股份有限公司 Composition and method for improvement in froth flotation
CN103506225A (en) * 2013-09-16 2014-01-15 四川晶大矿业科技有限公司 Zinc oxide mineral beneficiation collecting agent and preparation method of zinc oxide mineral beneficiation collecting agent

Also Published As

Publication number Publication date
CN105642447A (en) 2016-06-08

Similar Documents

Publication Publication Date Title
CN105642447B (en) Zinc oxide ore flotation agent and preparation method thereof
CN101717221B (en) Foaming agent for soil engineering
CN103540304B (en) Surfactant composition for intensified oil production and preparation method thereof
CN104232045B (en) Composite surface active agent composition and preparation method and application thereof
CN105537003B (en) Drainage oil type collophanite reverse flotation collecting agent and preparation method thereof
CN110000008B (en) Lead-zinc sulfide ore composite collecting agent, composite flotation reagent, and preparation and application of composite collecting agent and composite flotation reagent
CN103540303B (en) Composite surfactant composition as well as preparation method thereof
CN107935236A (en) A kind of method of the processing containing surface active agent wastewater
CN101703966A (en) Fluorite mineral carbonate inhibiting agent and preparation method thereof
CN104464867B (en) A kind of preparation method of Spent Radioactive machine oil high strength cement firming body
CN104607321A (en) Collophanite froth flotation collecting agent and preparation method thereof
WO2021128922A1 (en) Application of 2-(3-substituted ureido)-n-hydroxy-2-oxoacetimide cyanide compound in flotation
CN103350035A (en) Collophanite direct flotation collecting agent and preparation method thereof
CN105129893A (en) High efficiency extractant and extraction method of H-acid mother liquor
CN110152889A (en) A kind of silicon calcium quality ore Counterfloatating desiliconization removal of impurities combined capturing and collecting agent and its preparation method and application
CN105750091A (en) Mineral floatation colleting agent and manufacturing method thereof
CN109433426A (en) Oxide ores mineral collectors such as a kind of collecting fluorite and preparation method thereof
CN102060462A (en) Preparation method of enforced flyash cement grinding aid
CN104497757A (en) Preparation method of negative ion basic paint
CN101757983B (en) Tungsten ore floatation collecting agent and application thereof
CN103146501A (en) Environment-friendly high-efficiency laundry detergent and preparation method thereof
CN105413876A (en) Mineral separation activating agent used in lepidolite flotation process
CN106590565B (en) Middle low mineralization oil reservoir oil displacement compound surfactant composition
CN106000656B (en) Copper-lead inhibitor and application thereof
CN102631976B (en) Method for replacing lime by sodium hydroxide in scheelite heating concentration

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant