CN110265172A - One kind being suitable for earth work high conductivity calcined petroleum coke and preparation method thereof - Google Patents
One kind being suitable for earth work high conductivity calcined petroleum coke and preparation method thereof Download PDFInfo
- Publication number
- CN110265172A CN110265172A CN201910589929.5A CN201910589929A CN110265172A CN 110265172 A CN110265172 A CN 110265172A CN 201910589929 A CN201910589929 A CN 201910589929A CN 110265172 A CN110265172 A CN 110265172A
- Authority
- CN
- China
- Prior art keywords
- petroleum coke
- calcined petroleum
- earth work
- resistivity
- high conductivity
- 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.)
- Pending
Links
- 239000002008 calcined petroleum coke Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 16
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 14
- 239000010439 graphite Substances 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims abstract description 5
- 235000011149 sulphuric acid Nutrition 0.000 claims abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 4
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 7
- 239000003610 charcoal Substances 0.000 claims description 5
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 claims description 4
- 239000000138 intercalating agent Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 20
- 239000002689 soil Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003575 carbonaceous material Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000003837 high-temperature calcination Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000002006 petroleum coke Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/04—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of carbon-silicon compounds, carbon or silicon
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The present invention discloses a kind of earth work high conductivity calcined petroleum coke and preparation method thereof, is prepared by following raw materials: 15~25WT% of superconduction carbon dust of resistivity 1.2~1.4 × 10-5 Ω m, 100~150 75~85WT% of mesh calcined petroleum coke, 0.05~0.1WT% of nano-nickel powder.100~150 quantitative mesh calcined petroleum coke carbon feedstocks are used as anode by it, make anode current collector with stainless steel, it is immersed in certain density H2SO4 aqueous solution using doping vario-property method, make cathode with stereotype, it is electrolysed with constant current, it is modified to get this product to produce expansible graphite progress electric conductivity.The present invention is suitable for high soil resistivity geological environment and the novel grounded engineering drop resistance of Province Extreme Arid Climate environment, soil moisture conservation class material, it realizes neither polluted underground water source and soil, and can achieve the purpose that the resistance of earth work drop, soil moisture conservation under conditions of extreme drought.
Description
Technical field
The invention belongs to earth works to drop resistance soil moisture conservation technical field, and in particular to a kind of height suitable for earth work is led
Electric rate calcined petroleum coke and preparation method thereof.
Background technique
Calcined petroleum coke manufactured dark gray or black low-resistivity powder by 1200~1300 DEG C of high-temperature calcinations
Material.Its carbon content is about 90~97%, and hydrogen content is about 1.0~2.0%, has metallic luster, is in porosity, inside particle by
Small graphite crystallization constitutes granular, column and irregular crystal.It is mainly used for making graphite electrode for making steel, aluminium processed, magnesium processed
With anode mix, and production silicon carbide electrode etc..Calcined petroleum coke is a kind of good earth work resistance-lowering material.But because
Be not fully dedicated to grounding resistance-reducing engineering for its main application, therefore exist: electrical resistivity range is big, and pH value range is big, and graphite is hard
Granule content is more, is also easy to produce big etc. obstruction its disadvantage used in grounding resistance-reducing engineering of corrosive impurity content, therefore
The corrective measure that it cleaned, is modified by secondary graphitizing technique etc. is needed, its internal expansion content of graphite is increased,
Resistivity reduces, and removes its objectionable impurities for being also easy to produce metal erosion substantially, it is made to be more convenient for using in grounding resistance-reducing engineering.
Traditional earth work material finds that its material requested dosage is larger in current industry engineering construction application, material
Carrying, the storage of material are costly, and country's calcined petroleum coke material maker, which cannot still provide, at present meets this technical requirements
Calcined petroleum coke Carbon Materials, in addition to expensive conductive carbon fibres class material, there is no can large area in grounding resistance-reducing engineering
The such material promoted the use of, it is therefore desirable to which develop a kind of higher earth work of conductivity has with calcined petroleum coke Carbon Materials
Effect reduces engineering cost.According to current engineering construction experience, which in 0.5~0.7 × 10-3 Ω m, can preferably be reduced in this way
Materials'use amount 30%~40% makes grounding resistance-reducing project total cost about reduce by 15%.
Summary of the invention
The purpose of the present invention is provided a kind of suitable for high soil resistivity to solve deficiency existing for prior art
The resistance of the novel grounded engineering of geological environment and Province Extreme Arid Climate environment drop, soil moisture conservation class material, realize neither polluted underground water source
And soil, and can achieve the purpose that the resistance of earth work drop, soil moisture conservation under conditions of extreme drought.
The present invention is achieved through the following technical solutions:
A kind of earth work high conductivity calcined petroleum coke charcoal composition, by modified superconduction carbon dust, calcined petroleum coke, nanometer
Nickel powder is prepared.Weight ratio between each component are as follows:
Superconduction carbon dust (1.2~1.4 × 10-5 of resistivity Ω m) is 15~25WT% of modified additive；
100~150 75~85WT% of mesh calcined petroleum coke；
0.05~0.1WT% of nano-nickel powder；
It is further preferred that the weight ratio between each component are as follows:
Superconduction carbon dust (1.2~1.4 × 10-5 of resistivity Ω m) is modified additive 15WT%；
100~150 mesh calcined petroleum coke 75WT%；
Nano-nickel powder 0.05WT%；
It is a further object of the present invention to provide a kind of earth work preparation methods of high conductivity calcined petroleum coke:
Quantitative graphite raw material is used as anode by it, makees anode current collector with stainless steel, is immersed in certain density H2SO4 aqueous solution
In, or intercalator is made using decomposable salt such as ammonium nitrate and replaces H2SO4 aqueous solution, make cathode with stereotype, is carried out with constant current
Electrolysis, then expanded graphite is obtained through subsequent processing.Entire production process does not have the intervention of strong acid, highly basic, strong oxidizer, greatly reduces
Production cost is suitable for scale manufacture.The industrialized production of this research is used with calcined petroleum coke as original
Material, produces expanded graphite through subsequent processing again using the electrochemical oxidation process of ammonium nitrate solution.
The present invention is by utilizing superconduction carbon dust, using calcined petroleum coke as raw material, by 1200~1300 DEG C of high-temperature calcinations
And manufactured dark gray or black low-resistivity powder body material.Its carbon content is about 90~97%, and hydrogen content is about 1.0~2.0%,
With metallic luster, in porosity, granular, column and irregular crystal are constituted by small graphite crystallization inside particle.Mainly
For making graphite electrode for making steel, aluminium processed, magnesium anode mix processed, and production silicon carbide electrode etc..Calcined petroleum coke is
A kind of good earth work resistance-lowering material.But because its main application is not fully dedicated to grounding resistance-reducing engineering, exist:
Electrical resistivity range is big, and pH value range is big, and graphite hard particle content is more, be also easy to produce big etc. the obstruction of corrosive impurity content its
The disadvantage used in grounding resistance-reducing engineering, it is therefore desirable to which it is cleaned, is modified etc. by secondary graphitizing technique changes
Into measure, increase its internal expansion content of graphite, resistivity reduces, and it is miscellaneous to remove its nocuousness for being also easy to produce metal erosion substantially
Matter makes it be more convenient for using in grounding resistance-reducing engineering.
Earth work of the invention high conductivity calcined petroleum coke is a kind of higher earth work of conductivity with forging
Petroleum coke materials are burnt engineering cost is effectively reduced.According to current engineering construction experience, the parameter is preferably in 0.5~0.7 × 10-
3 Ω m, can reduce materials'use amount 30%~40% in this way, and grounding resistance-reducing project total cost is made about to reduce by 15%.
Specific embodiment
The present invention is described in further details below with reference to three embodiments, but protection scope of the present invention is not implemented
Example is limited, within the scope of the present invention without departing from basic conception of the invention.
Embodiment 1:
One kind being suitable for conductivity higher earth work calcined petroleum coke Carbon Materials, prepared by weight by following raw materials and
At: superconduction carbon dust 15WT%, the 100 mesh calcined petroleum coke 75WT%, nano-nickel powder of resistivity 1.2~1.4 × 10-5 Ω m
0.05WT%；
According to the above component and part ingredient, quantitative petroleum coke feed is used as anode, makees anode collection with stainless steel
Device is flowed, is immersed in certain density ammonium nitrate solution using doping vario-property method, makees cathode with stereotype, carry out electricity with constant current
Solution is produced expansible graphite progress electric conductivity and is modified, and entire production process does not have the intervention of strong acid, highly basic, strong oxidizer, i.e.,
Obtain product of the present invention.
Preparation method is common process method: according to said components, being existed respectively in a manner of being rapidly heated by component detection
Under 800 DEG C and 900 DEG C of two kinds of sintering temperatures, when soaking time is in 60~120 min, resistivity of material fall is more
Obviously.When soaking time is after being greater than 120 min, resistivity of material decline tends to be steady, the influence rule to resistivity of material
The verification test of rule.
Embodiment 2:
One kind being suitable for conductivity higher earth work calcined petroleum coke Carbon Materials, is prepared by weight by following raw materials
The superconduction carbon dust 20WT% of resistivity 1.2~1.4 × 10-5 Ω m, 120 mesh calcined petroleum coke 80WT%, nano-nickel powder
0.1WT%；
Preparation method is the same as embodiment 1.
Embodiment 3:
One kind being suitable for conductivity higher earth work calcined petroleum coke Carbon Materials, prepared by weight by following raw materials and
At: superconduction carbon dust 25WT%, the 150 mesh calcined petroleum coke 80WT%, nano-nickel powder of resistivity 1.2~1.4 × 10-5 Ω m
0.1WT%；
Preparation method is the same as embodiment 1.
Claims (4)
1. a kind of earth work high conductivity calcined petroleum coke charcoal composition, which is characterized in that be prepared by following raw materials:
15~25WT% of superconduction carbon dust of resistivity 1.2~1.4 × 10-5 Ω m；
100~150 75~85WT% of mesh calcined petroleum coke；
0.05~0.1WT% of nano-nickel powder.
2. earth work according to claim 1 high conductivity calcined petroleum coke charcoal composition, which is characterized in that under
Raw material is stated to be prepared:
A, the superconduction carbon dust 20WT% of 1.2~1.4 × 10-5 of resistivity Ω m；
B, 100~150 mesh calcined petroleum coke 79.95WT%；
C, nano-nickel powder 0.05WT%.
3. a kind of earth work preparation method of high conductivity calcined petroleum coke charcoal composition, is prepared by following raw materials:
The superconduction carbon dust 15WT% of resistivity 1.2~1.4 × 10-5 Ω m, 100 mesh calcined petroleum coke 75WT%, nano-nickel powder
0.05WT%,
100~150 quantitative mesh calcined petroleum coke carbon feedstocks are used as anode by it, make anode current collector with stainless steel, using mixing
Miscellaneous modified method is immersed in certain density H2SO4 aqueous solution, is made cathode with stereotype, is electrolysed with constant current, and producing can
It is modified to get this product that expanded graphite carries out electric conductivity.
4. the earth work according to claim 3 preparation method of high conductivity calcined petroleum coke charcoal composition, special
Sign is: making intercalator instead of H2SO4 aqueous solution using the decomposable salt such as ammonium nitrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589929.5A CN110265172A (en) | 2019-07-02 | 2019-07-02 | One kind being suitable for earth work high conductivity calcined petroleum coke and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589929.5A CN110265172A (en) | 2019-07-02 | 2019-07-02 | One kind being suitable for earth work high conductivity calcined petroleum coke and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110265172A true CN110265172A (en) | 2019-09-20 |
Family
ID=67923748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910589929.5A Pending CN110265172A (en) | 2019-07-02 | 2019-07-02 | One kind being suitable for earth work high conductivity calcined petroleum coke and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110265172A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398142A (en) * | 2020-03-05 | 2020-07-10 | 南方电网科学研究院有限责任公司 | Electrochemical corrosion test method for copper-coated steel grounding material |
| CN118016342A (en) * | 2024-04-09 | 2024-05-10 | 山东焦易网数字科技股份有限公司 | Calcined petroleum coke for extra-high voltage direct current transmission grounding electrode and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999037595A1 (en) * | 1998-01-26 | 1999-07-29 | Nippon Steel Chemical Co., Ltd. | Process for the preparation of needle coke for graphite electrodes |
| CN106064907A (en) * | 2016-06-05 | 2016-11-02 | 南昌航空大学 | A kind of sulfonated polyaniline modification Na-bentonite soil matrix friction reducer |
| CN106710664A (en) * | 2016-11-21 | 2017-05-24 | 国网甘肃省电力公司经济技术研究院 | High-conductivity calcined petroleum coke and preparation method thereof |
| CN106967438A (en) * | 2017-03-18 | 2017-07-21 | 大同新成新材料股份有限公司 | A kind of preparation method of lightning protection resistance-reducing grounding module material |
-
2019
- 2019-07-02 CN CN201910589929.5A patent/CN110265172A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999037595A1 (en) * | 1998-01-26 | 1999-07-29 | Nippon Steel Chemical Co., Ltd. | Process for the preparation of needle coke for graphite electrodes |
| CN1289316A (en) * | 1998-01-26 | 2001-03-28 | 新日铁化学株式会社 | Process for the preparation of needle coke for graphite electrodes |
| CN106064907A (en) * | 2016-06-05 | 2016-11-02 | 南昌航空大学 | A kind of sulfonated polyaniline modification Na-bentonite soil matrix friction reducer |
| CN106710664A (en) * | 2016-11-21 | 2017-05-24 | 国网甘肃省电力公司经济技术研究院 | High-conductivity calcined petroleum coke and preparation method thereof |
| CN106967438A (en) * | 2017-03-18 | 2017-07-21 | 大同新成新材料股份有限公司 | A kind of preparation method of lightning protection resistance-reducing grounding module material |
Non-Patent Citations (1)
| Title |
|---|
| 罗永勤等: "膨胀石墨的制备工艺及应用研究进展", 《化工生产与技术》, vol. 22, no. 5, pages 29 - 34 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111398142A (en) * | 2020-03-05 | 2020-07-10 | 南方电网科学研究院有限责任公司 | Electrochemical corrosion test method for copper-coated steel grounding material |
| CN118016342A (en) * | 2024-04-09 | 2024-05-10 | 山东焦易网数字科技股份有限公司 | Calcined petroleum coke for extra-high voltage direct current transmission grounding electrode and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhang et al. | Iron nanoparticles protected by chainmail‐structured graphene for durable electrocatalytic nitrate reduction to nitrogen | |
| CN103833274B (en) | A kind of heavy metal contamination soil consolidator and using method thereof | |
| JP6239117B2 (en) | Method for recovering discarded cemented carbide | |
| Cao et al. | A novel method for removing quinoline insolubles and ash in coal tar pitch using electrostatic fields | |
| CN110265172A (en) | One kind being suitable for earth work high conductivity calcined petroleum coke and preparation method thereof | |
| CN107904621A (en) | A kind of regeneration treating method of waste cathode of aluminum electrolytic cell carbon block | |
| CN107470646B (en) | Preparation method of superfine tungsten powder composite powder | |
| CN104438280A (en) | Method for sorting waste aluminum electrolytic cathodes | |
| Sun et al. | Recovery of WC and Co from cemented carbide scraps by remelting and electrodissolution | |
| CN102925929B (en) | Method for producing metal titanium by molten salt electrolysis | |
| CN110029220B (en) | Method for preparing metal chromium powder by reducing chromium oxide through two-step method | |
| CN104384512B (en) | A kind of preparation method of silver-tungsten carbide contact material | |
| CN103923715B (en) | With blue charcoal end for the method for water charcoal slurry prepared by raw material | |
| CN106944628B (en) | A kind of scrap hard alloy recycling prepares superfine WC-Co composite powder method | |
| CN106710664A (en) | High-conductivity calcined petroleum coke and preparation method thereof | |
| CN105502370A (en) | Solid phase reduction method of graphene oxide | |
| CN105777051B (en) | One kind is suitable for earth work grouting petroleum coke and preparation method | |
| CN105417584A (en) | Method for recycling manganese from electrolyzed manganese ore residues | |
| CN103146939B (en) | Method for reducing content of lead in lead brass | |
| CN105833871A (en) | Defect-rich cobalt-inlaid carbon nano tube as well as preparation method and application thereof | |
| CN109234767B (en) | Preparation method of superfine spherical copper powder | |
| CN108114972B (en) | Method for ex-situ remediation of mercury contaminated soil | |
| CN109796046A (en) | A kind of preparation process of high-purity ammonium paratungstate | |
| CN104404573A (en) | Preparation method of vanadium metal | |
| CN105088268A (en) | Manufacturing method of nano-reinforcement fluorite-preparing carbon anode plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |