CN108129064B - Gold tailing particle and application thereof in preparation of locomotive brake shoe friction material - Google Patents
Gold tailing particle and application thereof in preparation of locomotive brake shoe friction material Download PDFInfo
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- CN108129064B CN108129064B CN201711438187.3A CN201711438187A CN108129064B CN 108129064 B CN108129064 B CN 108129064B CN 201711438187 A CN201711438187 A CN 201711438187A CN 108129064 B CN108129064 B CN 108129064B
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- gold
- tailings
- brake shoe
- gold tailings
- locomotive brake
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000010931 gold Substances 0.000 title claims abstract description 88
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 87
- 230000003137 locomotive effect Effects 0.000 title claims abstract description 46
- 239000002245 particle Substances 0.000 title claims abstract description 44
- 239000002783 friction material Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 4
- 108090000790 Enzymes Proteins 0.000 claims description 26
- 102000004190 Enzymes Human genes 0.000 claims description 26
- 239000002002 slurry Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 239000007822 coupling agent Substances 0.000 claims description 12
- 239000002608 ionic liquid Substances 0.000 claims description 12
- 230000004048 modification Effects 0.000 claims description 12
- 238000012986 modification Methods 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- -1 N-butylpyridinium tetrafluoroborate Chemical compound 0.000 claims description 7
- 238000006477 desulfuration reaction Methods 0.000 claims description 7
- 230000023556 desulfurization Effects 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 5
- 238000004537 pulping Methods 0.000 claims description 5
- 108090000854 Oxidoreductases Proteins 0.000 claims description 4
- 102000004316 Oxidoreductases Human genes 0.000 claims description 4
- 108010086470 magnesium chelatase Proteins 0.000 claims description 4
- LSDPWZHWYPCBBB-UHFFFAOYSA-N methyl mercaptane Natural products SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 108010057394 Ferrochelatase Proteins 0.000 claims 1
- 102000003875 Ferrochelatase Human genes 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000013522 chelant Substances 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 108010025188 Alcohol oxidase Proteins 0.000 description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 125000001360 methionine group Chemical group N[C@@H](CCSC)C(=O)* 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 239000011573 trace mineral Substances 0.000 description 2
- 235000013619 trace mineral Nutrition 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 1
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- 229910001020 Au alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000000661 sodium alginate Substances 0.000 description 1
- 229940005550 sodium alginate Drugs 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/12—Condensation polymers of aldehydes or ketones
- C04B26/122—Phenol-formaldehyde condensation polymers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/12—Waste materials; Refuse from quarries, mining or the like
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00362—Friction materials, e.g. used as brake linings, anti-skid materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/001—Material of friction lining and support element of same or similar composition
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2250/00—Manufacturing; Assembly
- F16D2250/0023—Shaping by pressure
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention belongs to the technical field of gold tailing treatment, and particularly relates to gold tailing particles and application thereof in preparation of a locomotive brake shoe friction material. The invention utilizes the existing gold tailing waste as the raw material, and the obtained gold tailing particles can be used as the friction material for preparing the brake shoe of the locomotive by a specific treatment process of the gold tailing, and the performance of the prepared locomotive brake shoe can meet the requirement of the locomotive brake shoe, and the obtained brake shoe has higher high-temperature friction coefficient and stable friction performance at higher temperature, thereby being suitable for the requirement of the locomotive brake shoe.
Description
Technical Field
The invention belongs to the technical field of gold tailing treatment, and particularly relates to gold tailing particles and application thereof in preparation of a locomotive brake shoe friction material.
Background
In the civilization history of more than 5000 years in China, gold has been used for more than 4000 years, and the gold becomes one of the earliest countries in the world using gold and other alloys like Egypt, India and ancient Roman. The gold is listed as 79 sites in the periodic table of chemical elements, the atomic weight is 197, and the gold density is high (19.32 g/cm)3) But lighter than platinum. The gold is golden yellow and has good ductility, 31.25g of pure gold can be hammered into gold leaves with thickness of ten-thousandth of a millimeter and can be stuck to the surface of 9m2The area of (a). Gold is less volatile and typically the amount of gold that has been melted is negligible. The gold has good electric and heat conductivity, the electric conductivity is second only to silver and copper, and the heat conductivity is 74 percent of that of silver. The gold has very stable chemical property, can not be oxidized at low temperature or high temperature, does not act with single salt, nitre and sulfuric acid at normal temperature, but can be well dissolved by mixed acid (aqua regia) and cyanide solution. Pure gold is rare in nature, and gold can be combined with other metals to form alloys such as gold and silver, gold and copper alloys and the like.
The gold mining depends on the type and reserves of the gold deposit, and most gold ores have extremely low gold content, so that the production enterprise almost outputs how much ore and discharges how much tailings in the gold mining. The gold tailings are the wastes discharged after gold ore is ground to extract gold concentrate powder, are yellow powder, have smaller granularity and relatively uniform granularity distribution and contain more SiO2、CaO、Fe2O3、Al2O3MgO, which has higher surface energy and potential reaction activity.
The tailings discharged by gold systems in China each year exceed 2450 million tons, and because the mining mode is single, the mining process is laggard, and mining equipment is old, a large amount of tailings are remained and cannot be effectively recycled. At present, the comprehensive utilization rate of tailings is low, about 7 percent, and the rest tailings are generally piled up as solid wastes in a mineral warehouse mode, so that a large amount of land is occupied, the surrounding environment of the tailings warehouse is polluted, and a large amount of capital is invested for constructing and maintaining the tailings warehouse. In addition, the tailings have overproof pollutants or harmful components, various chemical agents added in the beneficiation process remain in the tailings, and the tailings are directly stacked on the ground surface without being treated, so that a large amount of land is occupied, and the surrounding environment is seriously polluted. Therefore, the comprehensive utilization of gold tailings becomes an important issue in the aspects of comprehensive utilization of gold mine resources and ecological environment protection.
The locomotive is controlled by a microcomputer network, is in standardized and modular design, has the advantages of wide constant power range, large shaft power, good adhesion property, high power factor, small harmonic interference, low maintenance rate, long service life, low operation cost, wide application range and the like, and is one of important mark products for the modernization of the Chinese railway equipment technology. At present, high-speed trains with the speed per hour of more than 300km are opened in China. The speeding up of trains puts higher demands on the braking system. More importantly, the locomotive generates high heat during braking, and thus, higher requirements are put on the friction performance of the braking device, especially the brake shoe in the braking device. However, most brake shoes generally have the defects of low and unstable high-temperature friction coefficient and poor shock resistance effect, and the requirement of high heat on the friction performance during locomotive braking is difficult to meet. Therefore, the technical problem to be solved by those skilled in the art is how to provide a brake shoe for a locomotive, which has high-temperature friction coefficient, stability and good impact resistance effect.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a new application of gold tailing particles to solve the problem of poor gold tailing treatment effect in the prior art.
In order to solve the technical problems, the method for treating the gold tailings comprises the following steps:
(1) crushing and sieving gold tailings, adding water for pulping, and adjusting the pH value to be neutral to obtain tailing slurry for later use;
(2) adding a coupling agent into the tailing slurry, and carrying out modification treatment in the presence of ionic liquid;
(3) adding an enzyme preparation into the modified tailing slurry for modification treatment;
(5) and (4) drying the tailings slurry treated in the step (4) at a low temperature, and grinding the tailings slurry into particles to obtain the required gold tailings particles.
In the step (2), the coupling agent is a chelating titanate coupling agent, and the mass ratio of the coupling agent to the gold tailings is 1: 2-3.
In the step (2), the ionic liquid is N-butylpyridinium tetrafluoroborate ionic liquid, and the addition amount of the ionic liquid accounts for 3-5 wt% of the amount of the gold tailings.
In the step (3), the enzyme preparation comprises a mixture of methyl mercaptan oxidase, methyl desulfurization enzyme, sulfoenzyme, iron chelatase and magnesium chelatase, and the addition amount of the enzyme preparation accounts for 5-10 wt% of the amount of the gold tailings.
The adding amount of the methyl mercaptan oxidase, the desulfurization methyl enzyme, the sulfoenzyme, the iron chelatase and the magnesium chelatase is 1: 1: 1: 1: 1.
the invention also discloses gold tailing particles processed by the gold tailing processing method.
The invention also discloses application of the gold tailing particles in preparation of a friction material for a locomotive brake shoe.
The invention also discloses a friction material which comprises the following raw material components in parts by weight:
the invention also discloses a locomotive brake shoe prepared from the friction material.
The invention also discloses a method for preparing the locomotive brake shoe, which comprises the following steps:
(1) mixing selected amounts of raw materials to obtain a mixture;
(2) conventionally pressing the mixture to obtain a blank;
(3) and heating and curing the blank to obtain the required locomotive brake shoe.
The invention uses the existing gold tailing waste as the raw material, and uses the coupling agent and the specific enzyme preparation to effectively modify the gold tailing in the presence of the ionic liquid, and the obtained gold tailing particles can be used for preparing the friction material of the brake shoe of the railway locomotive, thereby realizing the effective utilization of the gold tailing.
The friction material for preparing the locomotive brake shoe is prepared by taking gold tailing particles obtained by treatment as a raw material and assisting the action of phenolic resin, cellulose ether and sodium alginate, and the performance of the prepared locomotive brake shoe can meet the requirement of the locomotive brake shoe, and the obtained brake shoe has higher high-temperature friction coefficient and stable friction performance at higher temperature, and is suitable for the requirement of the locomotive brake shoe.
Detailed Description
The gold tailings treated in the following embodiments of the invention are gold tailings of Shandong Xinyuan Jinling Zhenjin, and the mineral composition, material properties and particle size distribution of the gold tailings are analyzed by assay, wherein the mineral composition of the gold tailings is as follows: au: 0.06 wt%, Ag: 1.00 wt% SiO2：74.6wt％、Al2O3：13.4wt％、K2O：4.06％、Na2O: 2.01 wt%, MgO: 0.37 wt%, CaO: 1.23 wt%, TFe: 1.56 wt%, S: 0.1 wt%, the specific trace element content is shown in table 1 below.
TABLE 1 content of trace elements in gold tailings
Example 1 gold tailings particles
The gold tailing particles are prepared by the following treatment method, and the treatment method comprises the following steps:
(1) crushing and sieving the gold tailings, uniformly mixing 10kg of crushed gold tailings particles with 20kg of water for pulping, and then adjusting the pH value of the pulp to be neutral to obtain tailing pulp for later use;
(2) adding 5kg of chelating titanate coupling agent into the tailing slurry, and adding 300g of N-butylpyridinium tetrafluoroborate ionic liquid for modification treatment for 3-5 h;
(3) adding 500g of enzyme preparation into the modified tailing slurry for modification treatment for 2h, wherein the enzyme preparation comprises the following components in a mass ratio of 1: 1: 1: 1: 1 of methionyl alcohol oxidase, desulfurization methyl enzyme, sulfoenzyme, iron chelate enzyme and magnesium chelate enzyme (the same applies below);
(5) and (3) drying the tailings slurry treated in the step (4) at a low temperature of 40-50 ℃ until the water content is lower than 1 wt%, then grinding the tailings by using a mechanical grinder, collecting the tailings particles with cylindrical needle-shaped structures, and sieving the tailings particles with a 600-mesh sieve to ensure that the content of particles with the number of 600 meshes or more in the tailings particles is at least 97%, thus obtaining the required gold tailings particles.
Example 2 gold tailings particles
The gold tailing particles are prepared by the following treatment method, and the treatment method comprises the following steps:
(1) crushing and sieving the gold tailings, uniformly mixing 15kg of crushed gold tailings particles with 30kg of water for pulping, and then adjusting the pH value of the pulp to be neutral to obtain tailing pulp for later use;
(2) adding 5kg of chelating titanate coupling agent into the tailing slurry, and adding 750g of N-butylpyridinium tetrafluoroborate ionic liquid for modification treatment for 3-5 h;
(3) adding 1500g of enzyme preparation into the modified tailing slurry for modification treatment for 2h, wherein the enzyme preparation comprises the following components in a mass ratio of 1: 1: 1: 1: 1 of methionyl alcohol oxidase, desulfurization methyl enzyme, sulfoenzyme, iron chelate enzyme and magnesium chelate enzyme (the same applies below);
(5) and (3) drying the tailings slurry treated in the step (4) at a low temperature of 40-50 ℃ until the water content is lower than 1 wt%, then grinding the tailings by using a mechanical grinder, collecting the tailings particles with cylindrical needle-shaped structures, and sieving the tailings particles with a 600-mesh sieve to ensure that the content of particles with the number of 600 meshes or more in the tailings particles is at least 97%, thus obtaining the required gold tailings particles.
Example 3 gold tailings particles
The gold tailing particles are prepared by the following treatment method, and the treatment method comprises the following steps:
(1) crushing and sieving the gold tailings, uniformly mixing 10kg of crushed gold tailings particles with 20kg of water for pulping, and then adjusting the pH value of the pulp to be neutral to obtain tailing pulp for later use;
(2) adding 4kg of chelating titanate coupling agent into the tailing slurry, and adding 400g of N-butylpyridinium tetrafluoroborate ionic liquid for modification treatment for 3-5 h;
(3) adding 750g of enzyme preparation into the modified tailing slurry for modification treatment for 2h, wherein the enzyme preparation comprises the following components in a mass ratio of 1: 1: 1: 1: 1 of methionyl alcohol oxidase, desulfurization methyl enzyme, sulfoenzyme, iron chelate enzyme and magnesium chelate enzyme (the same applies below);
(5) and (3) drying the tailings slurry treated in the step (4) at a low temperature of 40-50 ℃ until the water content is lower than 1 wt%, then grinding the tailings by using a mechanical grinder, collecting the tailings particles with cylindrical needle-shaped structures, and sieving the tailings particles with a 600-mesh sieve to ensure that the content of particles with the number of 600 meshes or more in the tailings particles is at least 97%, thus obtaining the required gold tailings particles.
EXAMPLE 4 brake shoe machining
The friction material described in this embodiment includes the following raw materials in parts by weight:
the locomotive brake shoe is made of the friction material, and the preparation method of the locomotive brake shoe comprises the following steps:
(1) mixing selected amounts of raw materials to obtain a mixture;
(2) putting the mixture into a die, and conventionally pressing for 10s at the temperature of 120 ℃ under the pressure of 5MPa to obtain a blank;
(3) and (3) heating and curing the blank at 200 ℃ for 24 hours to obtain the required locomotive brake shoe.
EXAMPLE 5 brake shoe machining
The friction material described in this embodiment includes the following raw materials in parts by weight:
the locomotive brake shoe is made of the friction material, and the preparation method of the locomotive brake shoe comprises the following steps:
(1) mixing selected amounts of raw materials to obtain a mixture;
(2) putting the mixture into a die, and conventionally pressing for 10s at the temperature of 120 ℃ under the pressure of 5MPa to obtain a blank;
(3) and (3) heating and curing the blank at 200 ℃ for 24 hours to obtain the required locomotive brake shoe.
EXAMPLE 6 brake shoe machining
The friction material described in this embodiment includes the following raw materials in parts by weight:
the locomotive brake shoe is made of the friction material, and the preparation method of the locomotive brake shoe comprises the following steps:
(1) mixing selected amounts of raw materials to obtain a mixture;
(2) putting the mixture into a die, and conventionally pressing for 10s at the temperature of 120 ℃ under the pressure of 5MPa to obtain a blank;
(3) and (3) heating and curing the blank at 200 ℃ for 24 hours to obtain the required locomotive brake shoe.
EXAMPLE 7 brake shoe machining
The friction material described in this embodiment includes the following raw materials in parts by weight:
the locomotive brake shoe is made of the friction material, and the preparation method of the locomotive brake shoe comprises the following steps:
(1) mixing selected amounts of raw materials to obtain a mixture;
(2) putting the mixture into a die, and conventionally pressing for 10s at the temperature of 120 ℃ under the pressure of 5MPa to obtain a blank;
(3) and (3) heating and curing the blank at 200 ℃ for 24 hours to obtain the required locomotive brake shoe.
EXAMPLE 8 brake shoe machining
The friction material described in this embodiment includes the following raw materials in parts by weight:
the locomotive brake shoe is made of the friction material, and the preparation method of the locomotive brake shoe comprises the following steps:
(1) mixing selected amounts of raw materials to obtain a mixture;
(2) putting the mixture into a die, and conventionally pressing for 10s at the temperature of 120 ℃ under the pressure of 5MPa to obtain a blank;
(3) and (3) heating and curing the blank at 200 ℃ for 24 hours to obtain the required locomotive brake shoe.
Examples of the experiments
1. Radioactive element detection
The gold tailing particles prepared in the examples 1 to 3 and the radioactive elements of the brake shoes of the locomotives prepared in the examples 4 to 8 are detected by a conventional method in the prior art, and the results show that the contents of the radioactive elements of the gold tailing particles and the brake shoes prepared by the method are lower than the industrial requirement standard. The method for treating the gold tailings can effectively modify the radioactive elements contained in the gold tailings, so that the prepared tailings particles can be effectively reused.
2. Brake shoe performance testing
The basic properties of the locomotive brake shoes made in examples 4-8 above were tested according to conventional methods and are reported in Table 2 below.
TABLE 2 basic Performance test results for locomotive brake shoes
| Numbering | Density g/cm3 | Impact strength kJ/m2 | Compressive strength Mpa | Flexural strength Mpa | Abrasion loss cm3/MJ |
| Example 4 | 2.06 | 5.0 | 42 | 10.45 | ＜1.0 |
| Example 5 | 2.07 | 4.9 | 42 | 10.48 | ＜1.0 |
| Example 6 | 2.12 | 5.2 | 45 | 10.61 | ＜1.0 |
| Example 7 | 2.09 | 5.1 | 43 | 10.57 | ＜1.0 |
| Example 8 | 2.10 | 5.1 | 43 | 10.55 | ＜1.0 |
Therefore, the basic performance of the locomotive brake shoe prepared by the method can completely meet the performance requirement of the locomotive brake shoe.
3. Determination of high temperature coefficient of friction
The locomotive brake shoes prepared in the above examples 4-8 were subjected to a temperature rise test to test the friction coefficient μ at the corresponding temperature, and the test results are reported in the following Table 3.
TABLE 3 determination of high temperature Friction coefficient
As can be seen from the data in the table, the brake shoe of the invention still has higher friction coefficient at high temperature, and the friction coefficient changes less with temperature, and the high-temperature friction performance is stable.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The method for treating the gold tailings is characterized by comprising the following steps:
(1) crushing and sieving gold tailings, adding water for pulping, and adjusting the pH value to be neutral to obtain tailing slurry for later use;
(2) adding a coupling agent into the tailing slurry, and carrying out modification treatment in the presence of ionic liquid;
(3) adding an enzyme preparation into the modified tailing slurry for modification treatment;
(4) and (4) drying the tailings slurry treated in the step (3) at a low temperature, and grinding the tailings slurry into particles to obtain the required gold tailings particles.
2. The treatment method of the gold tailings of claim 1, wherein in the step (2), the coupling agent is a chelating titanate coupling agent, and the mass ratio of the coupling agent to the gold tailings is 1: 2-3.
3. The treatment method of gold tailings according to claim 1 or 2, wherein in the step (2), the ionic liquid is N-butylpyridinium tetrafluoroborate ionic liquid, and the addition amount of the ionic liquid is 3-5 wt% of the amount of the gold tailings.
4. The process of claim 3, wherein in the step (3), the enzyme preparation comprises a mixture of methyl mercaptan oxidase, methyl desulfurization enzyme, sulfoenzyme, ferrochelatase and magnesium chelatase, and the amount of the enzyme preparation added is 5-10 wt% of the amount of the gold tailings.
5. The treatment method of the gold tailings of claim 4, wherein the methyl mercaptan oxidase, the methyl desulfurization enzyme, the sulfoenzyme, the iron chelatase and the magnesium chelatase are added in an amount of 1: 1: 1: 1: 1.
6. gold tailings particles processed by the method of treating gold tailings of any one of claims 1 to 5.
7. Use of the gold tailings particles of claim 6 for preparing a friction material for locomotive brake shoes.
8. The friction material is characterized by comprising the following raw material components in parts by weight:
9. a locomotive brake shoe prepared from the friction material of claim 8.
10. A method of making the locomotive brake shoe of claim 9, comprising the steps of:
(1) mixing selected amounts of raw materials to obtain a mixture;
(2) conventionally pressing the mixture to obtain a blank;
(3) and heating and curing the blank to obtain the required locomotive brake shoe.
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| CN201711438187.3A CN108129064B (en) | 2017-12-26 | 2017-12-26 | Gold tailing particle and application thereof in preparation of locomotive brake shoe friction material |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976702A (en) * | 2012-12-06 | 2013-03-20 | 杭州电子科技大学 | Method for preparing steam-pressed brick through gold mine tailings |
| CN106641033A (en) * | 2016-12-23 | 2017-05-10 | 北京天宜上佳新材料股份有限公司 | Friction material, haulage motor brake shoe containing same and preparation method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102976702A (en) * | 2012-12-06 | 2013-03-20 | 杭州电子科技大学 | Method for preparing steam-pressed brick through gold mine tailings |
| CN106641033A (en) * | 2016-12-23 | 2017-05-10 | 北京天宜上佳新材料股份有限公司 | Friction material, haulage motor brake shoe containing same and preparation method |
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