CN102259109B - Titanium and titanium alloy remnant waste material processing apparatus system and titanium material sorting method - Google Patents
Titanium and titanium alloy remnant waste material processing apparatus system and titanium material sorting method Download PDFInfo
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- CN102259109B CN102259109B CN 201110142612 CN201110142612A CN102259109B CN 102259109 B CN102259109 B CN 102259109B CN 201110142612 CN201110142612 CN 201110142612 CN 201110142612 A CN201110142612 A CN 201110142612A CN 102259109 B CN102259109 B CN 102259109B
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Abstract
The invention discloses a titanium and titanium alloy remnant waste material processing apparatus system and a titanium material sorting method. The apparatus system comprises a crushing apparatus, a washing apparatus, a drying apparatus, a sieving apparatus, an apparatus for removing high specific weight substances and magnetic substances, and a material distributing apparatus. The titanium material sorting method comprises the steps of: feeding, crushing, sieving, washing and deoiling, rinsing, drying, sieving, high specific gravity substance removing, magnetic substance removing, material distributing, and stuffing. The system and the method provided by the invention have high recovery efficiency and high automation. With the system and the method, titanium product chain can be prolonged, and characteristics of titanium and titanium alloy remnant waste materials in recovery of high qualified rate, low energy consumption, low land occupation, low water resource consumption, and no environmental pollution are achieved. With a manual sorting method, the sorting efficiency is low; acid and alkali washing are adopted; surface impurity processing is not thorough; subsequent titanium product processing is greatly influenced; and unqualified product is likely to be produced. With the system and the method provided by the present invention, the defects are overcome, a cost of 100 million to 160 million kilowatts of power can be saved per year, and a direct economic benefit exceeds 200 millions RMB.
Description
Technical field
The present invention relates to old metal material handling device system, be specifically related to the method for the maimed material processing device system of titanium or titanium alloy and letter sorting titanium material.
Background technology
Titanium is to be related to national economy, people's lives and national defense industry, the requisite new material of scientific technological advance and strategic materials, and Aeronautics and Astronautics, national defence and scientific and technological modernization all be unable to do without the titanium material.Many countries, especially industrially developed country competitively develop titanium industry in the world, increase the strategic reserves of titanium, and the height of titanium consumption has become one of sign of weighing the advanced degree of an industrialization of the country.
Titanium and alloy thereof are because the low (4.51 gram/cm of density
3, lighter by 40% approximately than steel), specific strength height and corrosion resistance be good and become a kind of good structural material, and be very noticeable in Aeronautics and Astronautics, ocean and chemical machinery field, also occupies critical role in the science and techniques of defence field.Titanium owing to have some specific function (as hydrogen storage property, shape memory, super-elasticity) and nontoxic, physiological compatibility is good etc., and characteristic becomes new function material and important biomedical material.
To produced by titanium sponge, founding, forging, the various titanium pieces that produce in the rolling process, the bits that are lathed, and the process that various titanium defective material and titanium scrap are recycled is exactly that residual titanium reclaims.The titanium of output sticks together in the production of titanium ingot, and its epicuticle, bottom and part sidepiece do not meet flaw-piece material and the off standard of target level of product quality owing to stained by iron, oil dirt etc. impurity, and the titanium powder that produces in the shattering process that sticks together must be handled recovery.In addition, various defective materials and the scrap that produces in titanium founding and titanium material process also must be handled recovery.
General, the residual titanium amount in the titanium sponge production account for that the output titanium sticks together 6%～8%, its chemical composition instability, the residual titanium of commodity requires titaniferous greater than 94%, appearance and size generally divides 25mm, 50mm, 80mm etc. several, or provides by customer requirements.The residual titanium of this kind also can be used as the raw material of civilian titanium casting and titanium powder metallurgy mainly as steel-making additive, aluminium grain refiner; Titanium valve (less than 0.83mm) can be for the raw material of making the fireworks in red-letter day.
As the residual titanium of steel-making additive, selected remove non-titanium impurity and TiN (O) after, be broken into the fritter less than 25mm, with its with mix less than the 0.83mm titanium valve, after sample analysis is qualified, be pressed into the titanium piece of (d/mm) 150 * (l/mm) 60.
During ferrotianium refining mild steel that the titanium piece made from residual titanium replaces producing with aluminothermic process, can reduce product cost, alleviate steel worker's labour intensity, save the metallic aluminium consumption.The molten steel that adds the refining of titanium piece can be cast under higher temperature, thereby can obtain the better ingot casting of quality.
The residual titanium that produces when founding titanium ingot, rolling titanium material and finished product, part processing, the general recyclable titanium sponge that substitutes is as the raw material of melting titanium ingot.Our this production line, be exactly at this link residual titanium, recycling is with residual titanium production line.
At present, China's year is produced 20,000 tons of titanium sponges, substantially all becomes the various titanium articles of titanium, as the titanium ingot, titanium rod, titanium plate, the titanium pipe, titanium silk etc., about finished product more than 30% has become various waste materials again in process, comprise the piece material, bits material etc., so a large amount of residual titaniums except the part industry demand is arranged and, major part all is the manual sorting, there is the degree of accuracy that is difficult to guarantee material, simultaneously the very low defective of efficient.
Summary of the invention
The purpose of this invention is to provide a kind of organic efficiency and automation that is intended to solve current production, prolong the chain that titanium products uses, solve the maimed material of titanium or titanium alloy in recovery, the qualification rate height, energy energy consumption is low, floor space is little, the conserve water resource, the maimed material processing device of the titanium or titanium alloy of environmental nonpollution system.
Another object of the present invention provides the method for bits material processing device system letter sorting titanium material.
In order to overcome the deficiency of manual sorting's titanium material, technical scheme of the present invention is to solve like this: the maimed material regeneration of a kind of titanium or titanium alloy bits material processing device system bag is opened up breaker, cleaning device, drying unit, screening plant, removal high specific gravity material and magnetisable material device, distribution device, and special character of the present invention is:
A. described breaker comprises feeder, disintegrating machine, vibratory sieve, first bucket elevator;
Connected mode is pressed the arrow direction successively and is connected: feeder → first belt conveyor → disintegrating machine → vibratory sieve → first bucket elevator → first feed bin;
B. described cleaning device comprises first feed bin, the first feed bin vibro-feeder, first hopper wall vibrator, bits rag tub, bits material potcher, dewaterer, second bucket elevator;
Connected mode is pressed the arrow direction successively and is connected: the first feed bin → first feed bin vibro-feeder → first hopper wall vibrator → bits rag tub → bits material potcher → dewaterer → second bucket elevator → second feed bin;
C. described drying unit comprises second feed bin, the second feed bin vibro-feeder, second hopper wall vibrator, drying plant, first jigging conveyer, a permanent magnetic plate, the 3rd bucket elevator;
Connected mode is pressed the arrow direction successively and is connected: second feed bin → second feed bin vibro-feeder → second hopper wall vibrator → drying plant → first jigging conveyer → permanent magnetic plate → the 3rd bucket elevator → the 3rd feed bin;
D. described screening plant comprises the 3rd feed bin, bitubular sieve, second jigging conveyer, the 3rd feed bin vibro-feeder, another permanent magnetic plate, the 4th bucket elevator;
Connected mode is pressed the arrow direction successively and is connected: the 3rd feed bin → bitubular sieve → the second jigging conveyer → the 3rd feed bin vibro-feeder → another permanent magnetic plate → the 4th bucket elevator → the 4th feed bin;
E. described removal high specific gravity metal field trash device comprises the 4th feed bin, stone remover, the 5th bucket elevator, intensity magnetic separator.
Connected mode is pressed the arrow direction successively and is connected: the 4th feed bin → stone remover → the 5th bucket elevator → intensity magnetic separator → the 5th feed bin;
F. described distribution device comprises the 5th feed bin, the 3rd jigging conveyer, material distributing machine.
Connected mode is pressed the arrow direction successively and is connected: the 5th feed bin → the 3rd jigging conveyer → material distributing machine.
The method of a kind of described bits material processing device system letter sorting titanium material, undertaken by following step successively:
1), feeding: the defective material tube is put into elevator locations by driving; Require to adopt standard cartridge 200L;
2), fragmentation: require bits material length less than 100mm, adopt special-purpose crocodile formula disintegrating machine; Because the titanium bits are very easily ignitable materials, so increased extinguishing device in disintegrating machine inside, after catching fire, the titanium bits can not put out a fire, can only allow material disconnect, bits gauge lattice: 10mm;
3), screening: adopt vibration to be input into device, screen sending in the process continuously, have requirement can not have Mars to produce; Prevent burning, continuously gait of march 3m/min;
4), washing oil removing: adopt heating continuously, add metal cleaner synchronously; Adopt Steam Heating, temperature: 75-85 ℃; Cleaning machine adopts 3 grades of continuous rotations to advance;
5), rinsing: 4 grades of rotation progression are adopted in rinsing, and circulating water device is adopted in rinsing, clean and the sewage of rinsing has independently sewage disposal system do subsequent treatment;
6), oven dry: adopt crawler type to be input into device, active hot-air system; Temperature 75-85 ℃;
7), screen removal high specific gravity material: pass through continuous screening plant, filter out stone, nonmetal and high specific gravity material;
8), remove magnetisable material: because titanium is nonmagnetic substance, use powerful magnetic separator that magnetic material is carried out sorting; The process of degaussing is to adopt continuous conveyer belt, and the magnetic roller of continuous rotation is arranged above it, and magnetic material is cleared out;
9), cloth material boxing: cloth is for forcing press provides blank, requires the qualified titanium bits of the amount of setting in tube uniformly, and material distributing machine is made of lift and automatic weighing system.
The present invention compared with prior art, be intended to solve organic efficiency and the automation of current production, prolong the chain that titanium products uses, solve the maimed material of titanium or titanium alloy in recovery, the qualification rate height, energy energy consumption is low, floor space is little, the conserve water resource, the characteristics of environmental nonpollution have overcome the low manual sorting of reaching of manual sorting's efficient and have used acid, neutralizing treatment, surface impurity to handle not thorough, become titanium article to cause very big influence to following process, serious meeting causes the defective of defective finished product.Year of the present invention is saved the usage charges of electric power 100000000～1600000000KW/H, and can obtain direct economic benefit will be above more than 200,000,000 yuan of RMB.
The advantage of this patent: the organic efficiency and the automation that are intended to solve current production, prolong the chain that titanium products uses, solve the maimed material of titanium or titanium alloy in recovery, the qualification rate height, energy energy consumption is low, floor space is little, the conserve water resource, the maimed material processing device of the titanium or titanium alloy of environmental nonpollution system.
Can under full automatic condition, finish above-mentioned functions automatically.
Technical indicator: year disposal ability 800T.
Description of drawings
Fig. 1 is the breaker structural representation;
Fig. 2 is the cleaning device structural representation;
Fig. 3 is the drying unit structural representation;
Fig. 4 is the screening plant structural representation;
Fig. 5 is for removing high specific gravity metal field trash apparatus structure schematic diagram;
Fig. 6 is the distribution device structural representation;
Fig. 7 is the processing device system structural representation.
The specific embodiment
Accompanying drawing is embodiments of the invention.
Content below in conjunction with the attached invention of accompanying drawing is described further:
Reference Figure 1 shows that the breaker structural representation,
A. described breaker comprises feeder 1, disintegrating machine 3, vibratory sieve 4, first bucket elevator 5;
Connected mode is pressed the arrow direction successively and is connected: feeder 1 → the first belt conveyor 2 → disintegrating machine 3 → vibratory sieve 4 → the first bucket elevators 5 → the first feed bins 6;
B. described cleaning device comprises first feed bin 6, the first feed bin vibro-feeder 7, first hopper wall vibrator 8, bits rag tub 9, bits material potcher 10, dewaterer 11, second bucket elevator 12;
Connected mode is pressed the arrow direction successively and is connected: first feed bin, 6 → the first feed bin vibro-feeders, 7 → the first hopper wall vibrators 8 → bits rag tub 9 → bits material potcher 10 → dewaterer 11 → the second bucket elevators 12 → the second feed bins 13;
C. described drying unit comprises second feed bin 13, the second feed bin vibro-feeder 14, second hopper wall vibrator 15, drying plant 16, first jigging conveyer 17, a permanent magnetic plate 18, the 3rd bucket elevator 19;
Connected mode is pressed the arrow direction successively and is connected: second feed bin, 13 → the second feed bin vibro-feeders, 14 → the second hopper wall vibrators, 15 → drying plant, 16 → the first jigging conveyers, 17 → permanent magnetic plate, 18 → the 3rd bucket elevators 19 → the 3rd feed bin 20;
D. described screening plant comprises the 3rd feed bin 20, bitubular sieve 21, second jigging conveyer 22, the 3rd feed bin vibro-feeder 23, another permanent magnetic plate 24, the 4th bucket elevator 25;
Connected mode is pressed the arrow direction successively and is connected: the 3rd feed bin 20 → bitubular sieve 21 → the second jigging conveyers 22 → the 3rd feed bin vibro-feeder 23 → another permanent magnetic plate 24 → the 4th bucket elevator 25 → the 4th feed bin 26;
E. described removal high specific gravity metal field trash device comprises the 4th feed bin 26, stone remover 27, the 5th bucket elevator 28, intensity magnetic separator 29.
Connected mode is pressed the arrow direction successively and is connected: the 4th feed bin 26 → stone remover 27 → the 5th bucket elevator 28 → intensity magnetic separators 29 → the 5th feed bin 30;
F. described distribution device comprises the 5th feed bin 30, the 3rd jigging conveyer 31, material distributing machine 32.
Connected mode is pressed the arrow direction successively and is connected: the 5th feed bin 30 → the 3rd jigging conveyer 31 → material distributing machine 32.
The method of a kind of described bits material processing device system letter sorting titanium material, undertaken by following step successively:
1), feeding: the defective material tube is put into elevator locations by driving; Require to adopt standard cartridge 200L;
2), fragmentation: require bits material length less than 100mm, adopt special-purpose crocodile formula disintegrating machine; Because the titanium bits are very easily ignitable materials, so increased extinguishing device in disintegrating machine inside, after catching fire, the titanium bits can not put out a fire, can only allow material disconnect, bits gauge lattice: 10mm;
3), screening: adopt vibration to be input into device, screen sending in the process continuously, have requirement can not have Mars to produce; Prevent burning, continuously gait of march 3m/min;
4), washing oil removing: adopt heating continuously, add metal cleaner synchronously; Adopt Steam Heating, temperature: 75-85 ℃; Lotion adopts 3 grades of continuous rotations to advance;
5), rinsing: 4 grades of rotation progression are adopted in rinsing, and circulating water device is adopted in rinsing, clean and the sewage of rinsing has independently sewage disposal system do subsequent treatment;
6), oven dry: adopt crawler type to be input into device, active hot-air system; Temperature 75-85 ℃;
7), screen removal high specific gravity material: pass through continuous screening plant, filter out stone, nonmetal and high specific gravity material;
8), remove magnetisable material: because titanium is nonmagnetic substance, use powerful magnetic separator that magnetic material is carried out sorting; The process of degaussing is to adopt continuous conveyer belt, and the magnetic roller of continuous rotation is arranged above it, and magnetic material is cleared out;
9), cloth material boxing: cloth is for forcing press provides blank, requires the qualified titanium bits of the amount of setting in tube uniformly, and material distributing machine is made of lift and automatic weighing system.
The processing procedure general introduction:
Manually with length less than on the bits shape defective material of 100mm to manual drawing-in device, make bits shape defective material enter disintegrating machine by belt conveyor and carry out fragmentation, through screening; It is broken again to return disintegrating machine than aniseed, is collected by gathering-device than small powder.Qualified bits shape defective material finally obtains qualified bits shape and returns furnace charge by operations such as washing oil removing, rinsing, oven dry, postsearch screening, removal high specific gravity material, removal magnetisable material, cloth material boxings.
The maimed material of HL-800 type titanium or titanium alloy regeneration production line is the mega project that determines the titanium stock utilization, and it is applicable to the melting of large-scale EB stove.Not only traditional melting mode conversion ratio can be improved 40%, also can promote raw-material reasonable development to use, appreciable economic benefit is opened in the development of titanium industry, calculate according to producing 50,000 tons of titanium articles every year, the defective material that produces is 20,000 tons, being recovered in utilization and will saving the use of raw material titanium sponge greatly of this part defective material, direct economic benefit will be above more than 200,000,000.Need raw material such as a large amount of titanium ores, magnesium, chlorine and produce titanium sponge, the titanium ore of China is from countries such as Australia, Vietnam, (titanium ore belongs to non-renewable resources to titanium ore outlet restriction along with these countries, so downstream product will further be processed into to titanium ore in exporting country, can strengthen the cost of purchase thus), the cost that will aggravate titanium sponge rises.
Titanium bits production line high specific gravity security of system operational procedure
One, prepares before the work: dressed appliances for labor protection, checked whether each lubricant housings is lubricated, and whether each securing member is fastening; Check whether bucket elevator and each belt conveyer connector be intact; Inspection collects sieve and goes up screenings, and whether air separator isolates the special barrel of thing and high intensity magnetic separation cull over against charging aperture, whether checks the distributing device special barrel over against charging aperture, and whether sampler places; Check whether the setting of air separator air inflow meets technological requirement (the bore hole bits are 3.5, and taking off scurf is 4.3).
Two, startup work: the power distributing cabinet switch that closes send electricity to system, presses the start button of oscillatory type elevator; Start button by following belt feeder (21) starts belt feeder; Press power knob at switch board, press green start button successively in the following order and start each equipment: the 5# belt feeder that---------------------bitubular sieve---1# bucket elevator---3# belt feeder, the 2# that the closes glassware switch that shakes is driven the 2# vibra feeder to the 2# bucket elevator to the double helix feeding machine to air separator to the 4# belt feeder to the elevator of 2# oscillatory type to intensity magnetic separator; According to the size (1.5A) that technological requirement is regulated the feed electric current, six switches on the intensity magnetic separator two vibrating material feeding device dishes are got to " 0 n " position, open two " MAIN " earlier, open two PEEDEK1 again, two PEEDEK2; Cloth will be interrupted and carries out, when there being the most bits period of the day from 11 p.m. to 1 a.m can on the slip clutch control device, switch be placed " leading to " position in the small feed bin, start distributing device, regulate the switch activated belt feeder of distributing device rotating speed (2-4 minute) belt feeder that closes (24) according to technological requirement, KPZ-ZA batcher gauge tap closes, stop belt feeder (24) and stop distributing device, the cloth charging basket therefrom takes out the sampling of sampler notice check group after filling with material, with overhead traveling crane bucket being sling to pour into then hangs up label in the dedicated slot, write title, the trade mark, specification and weight, date of manufacture clearly.
Three, shut down: shutdown sequence and power-up sequence are opposite, and the crumb that cleaning falls to the ground returns in the pending crumb after selecting non-metallic inclusion.After a collection of crumb is handled oversize, screenings, air separator are isolated the ferromagnetism thing that thing and intensity magnetic separator are selected, be recorded on the material transfer card.
Four, points for attention: during system works; operating personnel can not leave work position; to check at any time whether running device is stuck by material; if having crumb to grind the magnetic roller at wheel will in time clear up; whether balance of rate of feeding and discharge rate to be noted observing in bitubular when operation sieve, adjusting will be shut down when uneven.To select+material of 12mm returns between fragmentation broken again.When magnetic separation is worked, be with ferromagnetic instrument away from magnetic field, in case damage equipment and instrument.
Claims (2)
1. the maimed material of a titanium or titanium alloy regeneration treatment system comprises breaker, cleaning device, drying unit, screening plant, removal high specific gravity metal field trash device, distribution device,
A. described breaker comprises feeder (1), disintegrating machine (3), vibratory sieve (4), first bucket elevator (5);
Connected mode is pressed the arrow direction successively and is connected: feeder (1) → first belt conveyor (2) → disintegrating machine (3) → vibratory sieve (4) → first bucket elevator (5) → first feed bin (6);
B. described cleaning device comprises first feed bin (6), the first feed bin vibro-feeder (7), first hopper wall vibrator (8), bits rag tub (9), bits material potcher (10), dewaterer (11), second bucket elevator (12);
Connected mode is pressed the arrow direction successively and is connected: first feed bin (6) → first feed bin vibro-feeder (7) → first hopper wall vibrator (8) → bits rag tubs (9) → bits material potcher (10) → dewaterer (11) → second bucket elevator (12) → second feed bin (13);
C. described drying unit comprises second feed bin (13), the second feed bin vibro-feeder (14), second hopper wall vibrator (15), drying plant (16), first jigging conveyer (17), a permanent magnetic plate (18), the 3rd bucket elevator (19);
Connected mode is pressed the arrow direction successively and is connected: second feed bin (13) → second feed bin vibro-feeder (14) → second hopper wall vibrator (15) → drying plant (16) → first jigging conveyer (17) → permanent magnetic plate (18) → the 3rd bucket elevator (19) → the 3rd feed bin (20);
D. described screening plant comprises the 3rd feed bin (20), bitubular sieve (21), second jigging conveyer (22), the 3rd feed bin vibro-feeder (23), another permanent magnetic plate (24), the 4th bucket elevator (25);
Connected mode is pressed the arrow direction successively and is connected: the 3rd feed bin (20) → bitubular sieve (21) → second jigging conveyer (22) → the 3rd feed bin vibro-feeder (23) → another permanent magnetic plate (24) → the 4th bucket elevator (25) → the 4th feed bin (26);
E. described removal high specific gravity metal field trash device comprises the 4th feed bin (26), stone remover (27), the 5th bucket elevator (28), intensity magnetic separator (29);
Connected mode is pressed the arrow direction successively and is connected: the 4th feed bin (26) → stone remover (27) → the 5th bucket elevator (28) → intensity magnetic separator (29) → the 5th feed bin (30);
F. described distribution device comprises the 5th feed bin (30), the 3rd jigging conveyer (31), material distributing machine (32);
Connected mode is pressed the arrow direction successively and is connected: the 5th feed bin (30) → the 3rd jigging conveyer (31) → material distributing machine (32).
2. one kind is adopted the maimed method of expecting regeneration treatment system letter sorting titanium material of titanium or titanium alloy as claimed in claim 1, is undertaken by following step successively:
1), feeding: the defective material tube is put into elevator locations by driving; Require to adopt standard cartridge 200L;
2), fragmentation: require bits material length less than 100mm, adopt special-purpose crocodile formula disintegrating machine; Because the titanium bits are very easily ignitable materials, so increased extinguishing device in disintegrating machine inside, after catching fire, the titanium bits can not put out a fire, can only allow material disconnect, bits gauge lattice: 10mm;
3), screening: adopt vibration to be input into device, screen sending in the process continuously, have requirement can not have Mars to produce; Prevent burning, continuously gait of march 3m/min;
4), washing oil removing: adopt heating continuously, add metal cleaner synchronously; Adopt Steam Heating, temperature: 75-85 ℃; Cleaning agent adopts 3 grades of continuous spirals to advance;
5), rinsing: 4 grades of rotation progression are adopted in rinsing, and circulating water device is adopted in rinsing, clean and the sewage of rinsing has independently sewage disposal system do subsequent treatment;
6), oven dry: adopt crawler type to be input into device, active hot-air system; Temperature 75-85 ℃;
7), screen removal high specific gravity material: pass through continuous screening plant, filter out stone, nonmetal and high specific gravity material;
8), remove magnetisable material: because titanium is nonmagnetic substance, use powerful magnetic separator that magnetic material is carried out sorting; The process of degaussing is to adopt continuous conveyer belt, and the magnetic roller of continuous rotation is arranged above it, and magnetic material is cleared out;
9), cloth material boxing: cloth is for ingot forcing press in the middle of the titanium provides blank, requires the qualified titanium bits of the amount of setting in tube uniformly, and material distributing machine is made of lift and automatic weighing system.
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| CN103464443A (en) * | 2013-09-09 | 2013-12-25 | 昆山奥德鲁自动化技术有限公司 | Recovery method of metal waste during machining process |
| CN104148360B (en) * | 2014-07-03 | 2015-12-30 | 中航上大高温合金材料有限公司 | A kind of rare precious metal turning material cleaning |
| CN105521988B (en) * | 2014-09-30 | 2017-11-03 | 宝钢特钢有限公司 | A kind of easy and effective method for removing titanium scraped surface impurity |
| CN106702160A (en) * | 2015-08-05 | 2017-05-24 | 宁波创润新材料有限公司 | Method for processing ultrahigh purity titanium scraps |
| CN105013762B (en) * | 2015-08-19 | 2017-03-15 | 西安海联石化科技有限公司 | Rare metal and its alloy detritus material rotating cage type ultrasonic cleaning equipment and method |
| CN112844760B (en) * | 2021-02-07 | 2022-08-23 | 都江堰瑞泰科技有限公司 | Recycling and regenerating system for casting magnesia |
| CN113680500B (en) * | 2021-08-23 | 2023-05-02 | 山东锐石研磨材料有限公司 | Nonmetallic abrasive preparation process |
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| US6983901B2 (en) * | 2003-09-09 | 2006-01-10 | House Of Metals Company Limited | Method for recycling aluminum alloy wheels |
| JP4628721B2 (en) * | 2004-08-04 | 2011-02-09 | 株式会社クレハ環境 | Titanium dioxide recovery method |
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