CN104004247A - Method for preparing high-quality, environmental-friendly and odorless regenerated rubber - Google Patents
Method for preparing high-quality, environmental-friendly and odorless regenerated rubber Download PDFInfo
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- CN104004247A CN104004247A CN201410219974.9A CN201410219974A CN104004247A CN 104004247 A CN104004247 A CN 104004247A CN 201410219974 A CN201410219974 A CN 201410219974A CN 104004247 A CN104004247 A CN 104004247A
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- 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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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- 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
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention discloses a method for preparing high-quality, environmental-friendly and odorless regenerated rubber. The method comprises the steps of crushing and magnetic separation and chemical desulfurization, wherein the step of crushing and magnetic separation comprises the processes of crushing lumpy tires by a coarse crusher, sieving, so as to obtain coarse granules, carrying out first-time magnetic separation and second-time magnetic separation, so as to obtain pure coarse rubber granules and recovered steel wires, crushing the pure coarse rubber granules by a crushing machine, and then, sieving, thereby obtaining tread rubber powder; the step of chemical desulfurization comprises the processes of adding the tread rubber powder and auxiliaries, wherein a formula comprises the following ingredients in parts by weight: 1,200-2,000 parts of tread rubber powder, 120-200 parts of vegetable oil asphalt, 2-10 parts of activator, 10-40 parts of carbonate and 100-400 parts of water. According to the method, iron wires can be effectively separated, so that the wear to equipment is reduced, and the quality of the prepared tread rubber powder is good; the existing softener is replaced with the vegetable oil asphalt, and meanwhile, carbonate is added, so that the prepared product reaches the class-A recycled rubber standard of the national standard, is environmental-friendly and odorless and is not subjected to bluing.
Description
Technical field
The present invention relates to a kind of preparation method of regenerated rubber, particularly relate to the preparation method of the tasteless regenerated rubber of a kind of high quality environment-friendly type.
Background technology
At present, the technique of utilizing junked tire to produce tyre surface rubber powder comprises carries out the separation of mouth circle by junked tire, and slitting, stripping and slicing, be then directly ground into the tire after stripping and slicing 30-32 object fine powder, then this fine powder is obtained through magnetic separation to iron is cut and rubber powder.Like this, because iron wire is directly ground into iron end, on the one hand large to the wearing and tearing of equipment, on the other hand, iron end is difficult for removing completely in the time of magnetic separation, causes in final product iron end content large, finally affects the quality of regenerated rubber.
Regenerated rubber is by the physical desulfurization to waste rubber goodses such as tires (decompose, pulverize) and chemical desulfurization (the softening and activation under high temperature, high pressure), macromole cross-linked network in rubber item is destroyed to the small molecules mechanism for strand, make it become and can process viscoelastic body from elastomerics.
Traditional regenerated rubber is produced and has been passed through water law, oil process, after water/oil method, develop into now high-temperature dynamic desulfurization, normal temperature machine doctor treatment and infrared rays doctor treatment, the most frequently used still high-temperature dynamic desulfurization, its tenderizer using common are coal tar, Stockholm tar, coal-tar pitch etc., not only large to regenerated rubber contaminative (is mainly in the time using regenerated rubber, to occur jaundice, turn blue, the phenomenon such as turn white), and the rubber item smell of producing is very large, wherein contained aromatic hydrocarbon material also can affect to human consumer's physical and mental health, and (life rubber item is as rubber overshoes, leather shoes etc.).
Therefore those skilled in the art are devoted to develop one and can effectively separate iron wire, can reduce again the preparation method of the tasteless regenerated rubber of the iron poor environmental protection in end in wearing and tearing to equipment, tyre surface rubber powder.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide the preparation method of the tasteless regenerated rubber of a kind of high quality environment-friendly type, and in the method tyre surface rubber powder, iron-holder is few, little to equipment attrition, service life of equipment is long.
For achieving the above object, the invention provides the preparation method of the tasteless regenerated rubber of a kind of high quality environment-friendly type, comprise the step of junked tire being carried out mouthful to a circle separation, slitting, stripping and slicing and then pulverizes magnetic separation and obtain tyre surface rubber powder; Taking above-mentioned tread rubber powder as raw material, make the step of regenerated rubber through chemical desulfurization, refining glue, molding procedure, it is characterized in that:
The equipment of pulverizing magnetic separation comprises rubber coarse crushing pulverizer and tyre surface rubber powder pulverizer, below rubber coarse crushing pulverizer and tyre surface rubber powder pulverizer, be respectively equipped with the first and second vibratory screening apparatuss, the thin rubber powder discharge port of described the first vibratory screening apparatus is connected with compound belt conveyor by the first belt conveyor, the coarse particles discharge bucket of described the first vibratory screening apparatus material is out got back to coarse crusher for rubber by reclaiming belt conveyor, the setting that is inclined upwardly gradually from head end to end of described compound belt conveyor, be provided with rubber grain discharge bucket at the end of compound belt conveyor, be provided with the first full magnet drum near mixture belt conveyor end, driven cylinder and the first full magnet drum are in the same plane, steel wire separates belt conveyor and is enclosed within on the first full magnet drum and driven cylinder simultaneously, the head end of steel wire recovery belt conveyor is positioned at the below of steel wire separation belt conveyor, and be provided with steel wire discharge bucket at the end of described steel wire recovery belt conveyor, the below that described steel wire reclaims belt conveyor is provided with rubber grain belt conveyor, and the end cylinder of described rubber grain belt conveyor is the second full magnet drum, and described rubber grain discharge bucket lower end extends to the top of the head end of rubber grain belt conveyor, described rubber grain belt conveyor end is provided with rubber discharge bucket, described rubber discharge bucket material is out transported to tyre surface rubber powder pulverizer by the second belt conveyor, the below of the end of described rubber grain belt conveyor is also provided with circulation belt conveyor, and the end below of described circulation belt conveyor is for reclaiming the head end of belt conveyor,
The thick rubber powder discharge bucket of described the second vibratory screening apparatus material out is also got back to tyre surface rubber powder pulverizer by the second belt conveyor.
The processing step of described pulverizing magnetic separation is:
(1), by block tire after above-mentioned rubber coarse crushing pulverizer is pulverized, obtain 8-10 object coarse particles through the first bolting, described coarse particles is after the first belt conveyor, mixture belt conveyor, realize separating of steel wire and crude rubber particle at the end of mixture belt conveyor, steel wire is recovered after reclaiming belt conveyor by steel wire, and crude rubber particle enters rubber grain belt conveyor;
(2), above-mentioned crude rubber particle carries out at the end of rubber grain belt conveyor the rubber grain that magnetic separation obtains pure crude rubber particle and contains on a small quantity iron wire again, pure crude rubber particle enters and enters tyre surface rubber powder pulverizer by the second belt conveyor and pulverize; The rubber grain that contains on a small quantity iron wire is pulverized again by entering rubber coarse crushing pulverizer after circulation belt conveyor, recovery belt conveyor;
(3) rubber grain, after pulverizing in tyre surface rubber powder pulverizer enters the second vibratory screening apparatus and sieves, and obtains 30-32 object tyre surface rubber powder.
In described chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, pulverize the 30-32 object tyre surface rubber powder 1200-2000 part obtaining after magnetic separation, plant oil asphalt 120-200 part, activator 2-10 part, carbonate 10-40 part, water 100-400 part.
Adopt technique scheme, block tire is not directly ground into 30-32 order, but be first ground into 8-10 object coarse particles, can avoid steel wire to be directly ground into iron end, little to the wearing and tearing of equipment so on the one hand, the still steel wire that we screen in the time of magnetic separation on the other hand, the efficiency of magnetic separation is high.Moreover, we by coarse particles through twice magnetic separation, in the time of magnetic separation for the second time, further the particle removal of iron will be contained in coarse particles, make to enter iron level in the rubber grain of next step pulverizing and further reduce, after this process, in rubber, the clearance of iron is higher than 99.5%.Finally coarse particles is being ground into thinner powder, in this powder, the content at iron end is extremely low.
The plant oil asphalt that utilizes Oleum Gossypii semen tankage or soybean oil tankage to prepare replaces the petrochemical industry such as coal tar, coal-tar pitch class tenderizer and Stockholm tar, solve the pollution problem of the regenerated rubber of producing to derived product, solved again the secondary pollution problem to environment and the healthy infringement to practitioner in waste rubber resources recycling process.
But in plant oil asphalt, contain stearic acid and other unsaturated fatty acidss, acidic substance can produce directly impact to the sulfuration process of rubber, suitable stearic acid, Whitfield's ointment etc. can make the active raising of the vulcanization system in rubber item, and the rubber item density producing is better, but excessive acidic substance can make vulcanization rate slow down, and the goods that vulcanize there will be partially soft phenomenon.Therefore, we select to add carbonate to make a small amount of stearic acid generation saponification reaction in plant oil asphalt neutralize limited stearic acid.Secondly the present invention does not utilize oxyhydroxide and utilizes carbonate, and reaction milder makes to produce safer, reduces hurtful probability in the operating process such as workman's feeding.
Plant oil asphalt (not adding carbonate) and coal tar wet goods are done to each 200 grams of regenerated rubber that tenderizer produces and regenerated rubber of the present invention, after being ground into thin slice, laboratory, with scissors, film is cut into fragment, put into beaker, add the pure water of as much to boil 10 minutes, then oddments is filtered, again the solution after filtering is boiled to 100 milliliters in beaker, treat that solution is cooled to room temperature and carries out the test of PH test paper, coal tar does the regenerated rubber that tenderizer is produced, pH value is in 7. 5 left and right, and Oleum Gossypii semen plant asphalt does the regenerated rubber pH value of tenderizer production in 6 left and right.PH of the present invention is 6.5 left and right, is slightly acidic.
The regenerated rubber that the present invention is made and do not add according to formula of the present invention regenerated rubber and the existing regenerated rubber that utilizes the petrochemical industry such as coal tar, coal-tar pitch class tenderizer and Stockholm tar to make that carbonate makes and make leather sole according to identical technique.Do not add regenerated rubber that carbonate makes in the time of sulfuration, utilize regenerated rubber and the regenerated rubber of the present invention that the petrochemical industry such as coal tar, coal-tar pitch class tenderizer and Stockholm tar are made to want time delay to arrive sulfurizing point about 2 minutes than existing.
Adopt coal tar wet goods to do the reclaimed rubber production leather sole that tenderizer is produced, because the reason that coal tar pollutes, sole can move variable color very soon, sole is turned blue, and have sharp aroma, even if add essence also of no avail, but can not turn white after being soaked in water.The sole substantially tasteless that the environment-friendly type regenerated rubber that adopts plant oil asphalt (not adding carbonate) to do tenderizer production is produced, also can not turn blue, but after being soaked in water, sole will turn white.Slightly acidic regenerated rubber of the present invention makes leather sole have better wear resisting property, tasteless, does not turn blue, non-whitening after soaking.The indices of regenerated rubber of the present invention has all reached GB A level regenerated rubber standard.Tensile strength at yield 12-16MPA, pulls apart and extends 370-500%, mooney viscosity 60-90MLV, hardness 60-70 Shao Er A, proportion 1.1-1.2g/cm
3, abrasion 0.2-0.4CC.
As preferably: described carbonate is sodium carbonate or sodium bicarbonate or salt of wormwood or saleratus.
In technique scheme: described plant oil asphalt is Oleum Gossypii semen plant oil asphalt or soybean oil plant oil asphalt.
As preferably: in described chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, tyre surface rubber powder 1600-2000 part, plant oil asphalt 160-200 part, activator 4-8 part, carbonate 20-30 part, water 200-350 part.
In technique scheme: the processing condition of desulfurization are: tyre surface rubber powder, plant oil asphalt, activator, carbonate and water are added in digester, material is constantly stirred, be heated to 270-280 DEG C simultaneously, in the time that pressure reaches 2.0-2.8MPa, stop heating, leave standstill after 5-10 minute, exhaust pressure relief discharging, completes desulfurization operations.
In technique scheme: for environmental protection, described activator is reclaimed rubber desulfurize environment-friendly type activator.
As preferably: described reclaimed rubber desulfurize environment-friendly type activator is reclaimed rubber desulfurize activator 480 or reclaimed rubber desulfurize activator 510 or reclaimed rubber desulfurize activator 450 or reclaimed rubber desulfurize activator 420 or alkyl phenol disulfide.
In technique scheme: described block tire is of a size of 40*40mm.
In technique scheme: the drive roll of described compound belt conveyor is positioned at end, the drive roll of described steel wire recovery belt conveyor is positioned at below and the close first full magnet drum of steel wire separation belt conveyor, the drive roll of described compound belt conveyor is connected with the first full magnet drum by belt, and the described first full magnet drum is connected with the drive roll that steel wire reclaims belt conveyor by belt; The drive roll of described circulation belt conveyor is positioned at the second full magnet drum below, and by same driven by motor.Can save like this equipment investment.
The invention has the beneficial effects as follows: 1, block tire is not directly ground into 30-32 order by the present invention, but be first ground into 8-10 object coarse particles, can avoid steel wire to be directly ground into iron end, little to the wearing and tearing of coarse reduction equipment so on the one hand, the still steel wire that we screen in the time of magnetic separation on the other hand, the efficiency of magnetic separation is high, and this time magnetic separation is removed more than 99% steel wire.
2, we by coarse particles through twice magnetic separation, in the time of magnetic separation for the second time, further will in coarse particles, contain the particle removal of iron, make to enter iron level in the rubber grain of next step pulverizing and further reduce, after this process, in rubber, the clearance of iron is higher than 99.5%.
3, finally coarse particles is being ground into thinner particle, this time, in crushing process, little to the wearing and tearing of pulverizer, in the rubber powder after pulverizing, the content at iron end is extremely low, then through magnetic separation for the third time, almost no longer contains iron end in product.
4, the present invention adopts plant oil asphalt to replace the tenderizer as regenerated rubber chemical desulfurization such as existing coal tar, Stockholm tar, coal-tar pitch, and add carbonate simultaneously the stearic acid in plant oil asphalt and unsaturated fatty acids are neutralized, make the regenerated rubber making can reach GB A level regenerated rubber standard, feeding and operate all safety, environmental protection, tasteless.
5, do not turn blue with the leather sole that this regenerated rubber makes, non-whitening after soaking, wear resistance is good, and quality is good.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Carbonate in the present invention is normal salt M
2cO
3with acid salt MHCO
3the summation of (M is metal) two classes.
The preparation of embodiment 1 tyre surface rubber powder
Comprise that then junked tire is carried out mouthful to a circle separation, slitting, stripping and slicing pulverizes the step of magnetic separation, mouthful circle separation, slitting and stripping and slicing are existing technique, and the rubber after stripping and slicing is of a size of 40mm*40mm left and right.
Pulverize magnetic separation equipment used as shown in Figure 1:
By mixture belt conveyor 1, rubber grain discharge bucket 2, the first full magnet drum 3, driven cylinder 4, steel wire separates belt conveyor 5, steel wire reclaims belt conveyor 6, steel wire discharge bucket 7, rubber grain belt conveyor 8, rubber discharge bucket 9, circulation belt conveyor 10, the second full magnet drum 11, baffle plate 12, rubber coarse crushing pulverizer 13, first, vibratory screening apparatus 14, the first belt conveyor 15, reclaim belt conveyor 16, tyre surface rubber powder pulverizer 17, the second belt conveyor 18, the second vibratory screening apparatus 19 compositions such as parts such as grade.
The structure of rubber coarse crushing pulverizer 13 and tyre surface rubber powder pulverizer 17 is prior art, their a structure left side is not repeated at this.Below rubber coarse crushing pulverizer 13 and tyre surface rubber powder pulverizer 17, be respectively equipped with the first and second vibratory screening apparatuss 14,19, rubber coarse crushing pulverizer 13 and tyre surface rubber powder pulverizer 17 lay respectively at the top of the stem of the first and second vibratory screening apparatuss 14.19, the first vibratory screening apparatus 14 is identical with the second vibratory screening apparatus 19 structures, screen cloth in the middle part of comprising screen box and being arranged in screen box, screen box is divided into vibrating bin above and the thin rubber powder case of lower floor by screen cloth, this is prior art, does not repeat at this.Junked tire first becomes the bulk of 40*40mm through coarse crushing, the thin rubber powder discharge port that enters the first vibratory screening apparatus 14. first vibratory screening apparatuss 14 after the particle that this niggerhead is ground into 8-10 order left and right through rubber coarse crushing pulverizer 13 is again connected with compound belt conveyor 1 by the first belt conveyor 15, and the coarse particles discharge bucket of the first vibratory screening apparatus 14 material is out got back to coarse crusher for rubber 13 by reclaiming belt conveyor 16.
The second vibratory screening apparatus 19 fine powder is out our qualified rubber powder, and particle diameter is 30-32 order.Getting back to tyre surface rubber powder pulverizer 17 from the second vibratory screening apparatus 19 coarse particles out by the second belt conveyor 18 continues to pulverize.
Compound belt conveyor 1 setting that is inclined upwardly gradually from head end to end, be provided with rubber grain discharge bucket 2 at the end of compound belt conveyor 1, the drive roll of compound belt conveyor 1 is positioned at end, be provided with the first full magnet drum 3 near mixture belt conveyor 1 end, driven cylinder 4 and the first full magnet drum 3 are in the same plane, steel wire separates belt conveyor 5 and is enclosed within on full magnet drum 3 and driven cylinder 4 simultaneously, the head end of steel wire recovery belt conveyor 6 is positioned at the below of steel wire separation belt conveyor 5, and it is parallel with steel wire separation belt conveyor 5 that steel wire reclaims belt conveyor 6.And reclaim the end of belt conveyor 6 at steel wire and be provided with steel wire discharge bucket 7, steel wire reclaims out from steel wire discharge port 7.The drive roll of steel wire recovery belt conveyor 6 is positioned at below and the close first full magnet drum 3 of steel wire separation belt conveyor 5.The drive roll of compound belt conveyor 1 is connected with the first full magnet drum 3 by belt, and the first full magnet drum 3 is connected with the drive roll that steel wire reclaims belt conveyor 6 by belt.They three rotate by same driven by motor, save facility investment.
The below that steel wire reclaims belt conveyor 6 is provided with rubber grain belt conveyor 8, and the end cylinder of rubber grain belt conveyor 8 is the second full magnet drum 11, and rubber grain discharge bucket 2 lower ends extend to the top of the head end of rubber grain belt conveyor 8.The front of the discharge port of rubber grain discharge bucket 2 is provided with baffle plate 12, and baffle plate 12 is positioned at the top of rubber grain belt conveyor 8.
Rubber grain belt conveyor 8 ends are provided with rubber discharge bucket 9 and iron content rubber grain receiving hopper 20, and iron content rubber grain material receiving port 20 is positioned at towards inner side, and rubber discharge bucket 9 toward the outer side.Rubber discharge bucket 9 material is out transported to tyre surface rubber powder pulverizer 17 by the second belt conveyor 18, the below of the end of rubber grain belt conveyor 8 is also provided with circulation belt conveyor 10, and the discharge port of iron content rubber grain material receiving port 20 is positioned at the top of circulation belt conveyor 10.Rubber grain belt conveyor 8 is parallel with the circulation belt conveyor 10 that is positioned at its below, and the end below of circulation belt conveyor 10 is for reclaiming the head end of belt conveyor 16.The drive roll of circulation belt conveyor 10 is positioned at the second full magnet drum 11 belows, and by same driven by motor.
The concrete processing step of pulverizing magnetic separation is:
(1), by above-mentioned block tire after above-mentioned rubber coarse crushing pulverizer 13 is pulverized, obtain 8-10 object coarse particles and be positioned at the thicker particle of the screen cloth top of the first vibratory screening apparatus 14 through the first vibratory screening apparatus 14 screening.Thicker particle is got back to rubber coarse crushing pulverizer 13 by recovery belt conveyor 16 and is proceeded to pulverize.Coarse particles from the discharge bucket of the screen cloth below of the first vibratory screening apparatus 14 out after the first belt conveyor 15, mixture belt conveyor 1, realize separating of steel wire and crude rubber particle at the end of mixture belt conveyor 1, steel wire is taken away by the first full magnet drum 3, after reclaiming belt conveyor 6 by steel wire again, be recovered, crude rubber particle arrives rubber grain belt conveyor 8 by rubber discharge bucket 9.
(2), above-mentioned crude rubber particle carries out through the second full magnet drum 11 rubber grain that magnetic separation obtains pure crude rubber particle and contains on a small quantity iron wire at the end of rubber grain belt conveyor 8 again, pure crude rubber particle enters the afterbody of the second vibratory screening apparatus 19, then enters tyre surface rubber powder pulverizer 17 by the second belt conveyor 18 and pulverizes; The rubber grain that contains on a small quantity iron wire is pulverized again by entering rubber coarse crushing pulverizer 13 after circulation belt conveyor 10, recovery belt conveyor 16;
(3) rubber grain, after pulverizing in tyre surface rubber powder pulverizer 17 enters the second vibratory screening apparatus 19 and sieves, and after screening, the tyre surface rubber powder of screen cloth below out obtains 30-32 object tyre surface rubber powder, iron content end hardly from thin rubber powder discharge bucket.The material of screen cloth top, by after thick rubber powder discharge bucket, arrives the second belt conveyor 18, then gets back to tyre surface rubber powder pulverizer 17 and pulverizes.
Embodiment 2
The 30-32 order tyre surface rubber powder making taking embodiment 1 is raw material, makes through chemical desulfurization, refining glue, molding procedure.
In chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, 1200 parts of tyre surface rubber powders, 120 parts of plant oil asphalts, 4804 parts, reclaimed rubber desulfurize activator, 10 parts, sodium bicarbonate, 100 parts, water.
Tyre surface rubber powder, plant oil asphalt, activator, sodium bicarbonate and water are added in digester, material is constantly stirred, be heated to 280 DEG C simultaneously, in the time that pressure reaches 2.8MPa, reaction times is probably 2h, stops heating, leaves standstill after 5 minutes, exhaust pressure relief discharging, completes desulfurization operations.Slightly refine, scrape refining, refining through rubber mixing machine again, then moulding obtains product.
The smooth exquisiteness of prepared product appearance, without particle and impurity, through test, physicals reaches the standard of GB A level regenerated rubber.Detected result is
Tensile strength at yield 12MPA, pulls apart and extends 370%, mooney viscosity 70MLV, hardness 70 Shao Er A, proportion 1.20g/cm
3, abrasion 0.325CC.
Embodiment 3
The 30-32 order tyre surface rubber powder making taking embodiment 1 is raw material, makes through chemical desulfurization, refining glue, molding procedure.
In chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, 1800 parts of tyre surface rubber powders, 180 parts of plant oil asphalts, 5106 parts, reclaimed rubber desulfurize activator, 25 parts, soda, 350 parts, water.
Tyre surface rubber powder, plant oil asphalt, activator, soda and water are added in digester, material is constantly stirred, be heated to 270 DEG C simultaneously, in the time that pressure reaches 2.0MPa, the reaction times is probably 2h, stops heating, leave standstill after 10 minutes, exhaust pressure relief discharging, completes desulfurization operations.Slightly refine, scrape refining, refining through rubber mixing machine again, then moulding obtains product.
The smooth exquisiteness of prepared product appearance, without particle and impurity, through test, physicals reaches the standard of GB A level regenerated rubber.Detected result is
Tensile strength at yield 15MPA, pulls apart and extends 400%, mooney viscosity 65MLV, hardness 62 Shao Er A, proportion 1.18g/cm
3, abrasion 0.38CC.
Embodiment 4
The 30-32 order tyre surface rubber powder making taking embodiment 1 is raw material, makes through chemical desulfurization, refining glue, molding procedure.
In chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, 2000 parts of tyre surface rubber powders, 200 parts of plant oil asphalts, 51010 parts, reclaimed rubber desulfurize activator, 40 parts, salt of wormwood, 400 parts, water.
Tyre surface rubber powder, plant oil asphalt, activator, salt of wormwood and water are added in digester, material is constantly stirred, be heated to 280 DEG C simultaneously, in the time that pressure reaches 2.8MPa, reaction times is probably 2h, stops heating, leaves standstill after 10 minutes, exhaust pressure relief discharging, completes desulfurization operations.Slightly refine, scrape refining, refining through rubber mixing machine again, then moulding obtains product.
The smooth exquisiteness of prepared product appearance, without particle and impurity, through test, physicals reaches the standard of GB A level regenerated rubber.Detected result is
Tensile strength at yield 16MPA, pulls apart and extends 420%, mooney viscosity 90MLV, hardness 70 Shao Er A, proportion 1.15g/cm
3, abrasion 0.28CC.
Embodiment 5
The 30-32 order tyre surface rubber powder making taking embodiment 1 is raw material, makes through chemical desulfurization, refining glue, molding procedure.
In chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, 1600 parts of tyre surface rubber powders, 160 parts of plant oil asphalts, 4508 parts, reclaimed rubber desulfurize activator, 20 parts of saleratus, 200 parts, water.
Tyre surface rubber powder, plant oil asphalt, activator, saleratus and water are added in digester, material is constantly stirred, be heated to 280 DEG C simultaneously, in the time that pressure reaches 2.8MPa, reaction times is probably 2h, stops heating, leaves standstill after 10 minutes, exhaust pressure relief discharging, completes desulfurization operations.Slightly refine, scrape refining, refining through rubber mixing machine again, then moulding obtains product.
The smooth exquisiteness of prepared product appearance, without particle and impurity, through test, physicals reaches the standard of GB A level regenerated rubber.Detected result is
Tensile strength at yield 14MPA, pulls apart and extends 390%, mooney viscosity 70MLV, hardness 65 Shao Er A, proportion 1.20g/cm
3, abrasion 0.352CC.
Embodiment 6
The 30-32 order tyre surface rubber powder making taking embodiment 1 is raw material, makes through chemical desulfurization, refining glue, molding procedure.
In chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, 1400 parts of tyre surface rubber powders, 140 parts of plant oil asphalts, 4202 parts, reclaimed rubber desulfurize activator, 15 parts, sodium bicarbonate, 250 parts, water.
Tyre surface rubber powder, plant oil asphalt, activator, sodium bicarbonate and water are added in digester, material is constantly stirred, be heated to 280 DEG C simultaneously, in the time that pressure reaches 2.8MPa, reaction times is probably 2h, stops heating, leaves standstill after 10 minutes, exhaust pressure relief discharging, completes desulfurization operations.Slightly refine, scrape refining, refining through rubber mixing machine again, then moulding obtains product.
The smooth exquisiteness of prepared product appearance, without particle and impurity, through test, physicals reaches the standard of GB A level regenerated rubber.Detected result is
Tensile strength at yield 15MPA, pulls apart and extends 385%, mooney viscosity 68MLV, hardness 68 Shao Er A, proportion 1.20g/cm
3, abrasion 0.4CC.
Embodiment 7
The 30-32 order tyre surface rubber powder making taking embodiment 1 is raw material, makes through chemical desulfurization, refining glue, molding procedure.
In chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, 1800 parts of tyre surface rubber powders, 180 parts of plant oil asphalts, 4207 parts, reclaimed rubber desulfurize activator, 26 parts, sodium bicarbonate, 350 parts, water.
Tyre surface rubber powder, plant oil asphalt, activator, sodium bicarbonate and water are added in digester, material is constantly stirred, be heated to 280 DEG C simultaneously, in the time that pressure reaches 2.8MPa, reaction times is probably 2h, stops heating, leaves standstill after 10 minutes, exhaust pressure relief discharging, completes desulfurization operations.Slightly refine, scrape refining, refining through rubber mixing machine again, then moulding obtains product.
The smooth exquisiteness of prepared product appearance, without particle and impurity, through test, physicals reaches the standard of GB A level regenerated rubber.Detected result is
Tensile strength at yield 14MPA, pulls apart and extends 430%, mooney viscosity 66MLV, hardness 65 Shao Er A, proportion 1.20g/cm
3, abrasion 0.328CC.
More than describe preferred embodiment of the present invention in detail.Wherein, activator can also be the environment-friendly type activator of other types, as alkyl phenol disulfide.Carbonate can also be other carbonate, should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (9)
1. a preparation method for the tasteless regenerated rubber of high quality environment-friendly type, comprises the step of junked tire being carried out mouthful to a circle separation, slitting, stripping and slicing and then pulverizes magnetic separation and obtain tyre surface rubber powder; Taking above-mentioned tread rubber powder as raw material, make the step of regenerated rubber through chemical desulfurization, refining glue, molding procedure, it is characterized in that:
The equipment of pulverizing magnetic separation comprises rubber coarse crushing pulverizer (13) and tyre surface rubber powder pulverizer (17), below at rubber coarse crushing pulverizer (13) and tyre surface rubber powder pulverizer (17) is respectively equipped with the first and second vibratory screening apparatuss (14,19), the thin rubber powder discharge port of described the first vibratory screening apparatus (14) is connected with compound belt conveyor (1) by the first belt conveyor (15), the coarse particles discharge bucket of described the first vibratory screening apparatus (14) material is out got back to coarse crusher for rubber (13) by reclaiming belt conveyor (16), described compound belt conveyor (1) setting that is inclined upwardly gradually from head end to end, be provided with rubber grain discharge bucket (2) at the end of compound belt conveyor (1), be provided with the first full magnet drum (3) near mixture belt conveyor (1) end, driven cylinder (4) is in the same plane with the first full magnet drum (3), steel wire separates belt conveyor (5) and is enclosed within on the first full magnet drum (3) and driven cylinder (4) simultaneously, the head end of steel wire recovery belt conveyor (6) is positioned at the below of steel wire separation belt conveyor (5), and be provided with steel wire discharge bucket (7) at the end of described steel wire recovery belt conveyor (6), the below that described steel wire reclaims belt conveyor (6) is provided with rubber grain belt conveyor (8), the end cylinder of described rubber grain belt conveyor (8) is the second full magnet drum (11), and described rubber grain discharge bucket (2) lower end extends to the top of the head end of rubber grain belt conveyor (8), described rubber grain belt conveyor (8) end is provided with rubber discharge bucket (9), described rubber discharge bucket (9) material is out transported to tyre surface rubber powder pulverizer (17) by the second belt conveyor (18), the below of the end of described rubber grain belt conveyor (8) is also provided with circulation belt conveyor (10), and the end below of described circulation belt conveyor (10) is for reclaiming the head end of belt conveyor (16),
The thick rubber powder discharge bucket of described the second vibratory screening apparatus (19) material out is also got back to tyre surface rubber powder pulverizer (17) by the second belt conveyor (18).
The processing step of described pulverizing magnetic separation is:
(1), by block tire through above-mentioned rubber coarse crushing pulverizer (13) pulverize after, obtain 8-10 object coarse particles through the first vibratory screening apparatus (14) screening, described coarse particles is after the first belt conveyor (15), mixture belt conveyor (1), realize separating of steel wire and crude rubber particle at the end of mixture belt conveyor (1), steel wire is recovered after reclaiming belt conveyor (6) by steel wire, and crude rubber particle enters rubber grain belt conveyor (8);
(2), above-mentioned crude rubber particle carries out at the end of rubber grain belt conveyor (8) rubber grain that magnetic separation obtains pure crude rubber particle and contains on a small quantity iron wire again, pure crude rubber particle enters and enters tyre surface rubber powder pulverizer (17) by the second belt conveyor (18) and pulverize; The rubber grain that contains on a small quantity iron wire is pulverized again by entering rubber coarse crushing pulverizer (13) after circulation belt conveyor (10), recovery belt conveyor (16);
(3) rubber grain, after pulverizing in tyre surface rubber powder pulverizer (17) enters the second vibratory screening apparatus (19) and sieves, and obtains 30-32 object tyre surface rubber powder;
In described chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, pulverize the 30-32 object tyre surface rubber powder 1200-2000 part obtaining after magnetic separation, plant oil asphalt 120-200 part, activator 2-10 part, carbonate 10-40 part, water 100-400 part.
2. the preparation method of the tasteless regenerated rubber of high quality environment-friendly type according to claim 1, is characterized in that: described plant oil asphalt is Oleum Gossypii semen plant oil asphalt or soybean oil plant oil asphalt.
3. the preparation method of the tasteless regenerated rubber of high quality environment-friendly type according to claim 1, is characterized in that: described carbonate is sodium carbonate or sodium bicarbonate or salt of wormwood or saleratus.
4. according to the preparation method of the tasteless regenerated rubber of high quality environment-friendly type described in claim 1-3 any one, it is characterized in that: in described chemical desulfurization operation, add in tyre surface rubber powder and auxiliary formula: according to parts by weight meter, tyre surface rubber powder 1600-2000 part, plant oil asphalt 160-200 part, activator 4-8 part, carbonate 20-30 part, water 200-350 part.
5. the preparation method of the tasteless regenerated rubber of high quality environment-friendly type according to claim 4, it is characterized in that: the processing condition of desulfurization are: tyre surface rubber powder, plant oil asphalt, activator, carbonate and water are added in digester, material is constantly stirred, be heated to 270-280 DEG C simultaneously, in the time that pressure reaches 2.0-2.8MPa, stop heating, leave standstill after 5-10 minute, exhaust pressure relief discharging, completes desulfurization operations.
6. according to the preparation method of the tasteless regenerated rubber of any one high quality environment-friendly type in claim 1-2 or 5, it is characterized in that: described activator is reclaimed rubber desulfurize environment-friendly type activator.
7. the preparation method of the tasteless regenerated rubber of high quality environment-friendly type according to claim 6, is characterized in that: described reclaimed rubber desulfurize environment-friendly type activator is reclaimed rubber desulfurize activator 480 or reclaimed rubber desulfurize activator 510 or reclaimed rubber desulfurize activator 450 or reclaimed rubber desulfurize activator 420 or alkyl phenol disulfide.
8. the preparation method of the tasteless regenerated rubber of high quality environment-friendly type according to claim 1, is characterized in that: described block tire is of a size of 40*40mm.
9. the preparation method of the tasteless regenerated rubber of high quality environment-friendly type according to claim 1, it is characterized in that: the drive roll of described compound belt conveyor (1) is positioned at end, the drive roll of described steel wire recovery belt conveyor (6) is positioned at below and the close first full magnet drum (3) of steel wire separation belt conveyor (5), the drive roll of described compound belt conveyor (1) is connected with the first full magnet drum (3) by belt, the described first full magnet drum (3) is connected with the drive roll that steel wire reclaims belt conveyor (6) by belt, the drive roll of described circulation belt conveyor (10) is positioned at the second full magnet drum (11) below, and by same driven by motor.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10179479B2 (en) | 2015-05-19 | 2019-01-15 | Bridgestone Americas Tire Operations, Llc | Plant oil-containing rubber compositions, tread thereof and race tires containing the tread |
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Application publication date: 20140827 |