CN1048659C - Separation process for obtaining high-grade SiC crystal whiskers - Google Patents
Separation process for obtaining high-grade SiC crystal whiskers Download PDFInfo
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- CN1048659C CN1048659C CN94117781A CN94117781A CN1048659C CN 1048659 C CN1048659 C CN 1048659C CN 94117781 A CN94117781 A CN 94117781A CN 94117781 A CN94117781 A CN 94117781A CN 1048659 C CN1048659 C CN 1048659C
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- sic
- chats
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- 239000013078 crystal Substances 0.000 title claims abstract description 19
- 238000000926 separation method Methods 0.000 title abstract description 13
- 238000005188 flotation Methods 0.000 claims abstract description 53
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000003814 drug Substances 0.000 claims abstract description 9
- 239000000047 product Substances 0.000 claims description 46
- 238000005516 engineering process Methods 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 21
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- 238000002156 mixing Methods 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910052799 carbon Inorganic materials 0.000 claims description 11
- 238000005245 sintering Methods 0.000 claims description 10
- WVYWICLMDOOCFB-UHFFFAOYSA-N 4-methyl-2-pentanol Chemical compound CC(C)CC(C)O WVYWICLMDOOCFB-UHFFFAOYSA-N 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 239000004088 foaming agent Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- 125000000129 anionic group Chemical group 0.000 claims description 6
- 238000004513 sizing Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 125000002091 cationic group Chemical group 0.000 claims description 5
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 claims description 4
- 239000006227 byproduct Substances 0.000 claims description 4
- 235000013339 cereals Nutrition 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 4
- -1 enuatrol Chemical compound 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 claims description 3
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000005642 Oleic acid Substances 0.000 claims description 3
- 240000007594 Oryza sativa Species 0.000 claims description 3
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 239000010903 husk Substances 0.000 claims description 3
- 239000013067 intermediate product Substances 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 239000011297 pine tar Substances 0.000 claims description 3
- 229940068124 pine tar Drugs 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- GQSARBOWRIBUBV-UHFFFAOYSA-N 1-hydroxy-4,5-dihydroimidazole Chemical compound ON1CCN=C1 GQSARBOWRIBUBV-UHFFFAOYSA-N 0.000 claims description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical class CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 2
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 claims description 2
- 238000006124 Pilkington process Methods 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 229960003237 betaine Drugs 0.000 claims description 2
- 238000005660 chlorination reaction Methods 0.000 claims description 2
- 235000019441 ethanol Nutrition 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 2
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 2
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 238000006277 sulfonation reaction Methods 0.000 claims description 2
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 2
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- 239000012744 reinforcing agent Substances 0.000 abstract description 7
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- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
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- Carbon And Carbon Compounds (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
The present invention relates to a separation technique for obtaining high-quality SiC crystal whisker products from sintered SiC crystal whisker rough material. The present invention is characterized in that reverse flotation separation is carried out after pulp of pulverized material is conditioned twice; tailings of the pulverized material are separated by a cyclone or processed by direct flotation preparation; middlings are processed by a cyclone bank or a quick table; the technological process is reasonably combined and can be used for separating tractable material and intractable material to respectively obtain high-grade SiC-w products, the quality reaches 97-98%, and the average diameters are 1.0, 1.5 and larger than or equal to 3.0 mum; the present invention provides a high-quality reinforcing agent for composite material in a high-tech field; the technique has the advantages of favorable separation effect, medicament saving, good equipment compatibility and simple operation.
Description
The present invention relates to a kind of separating technology that from SiC whisker sintering coarse fodder, further obtains the whisker of high-grade Sic, particularly adopt the separating technology of flotation and gravity treatment integration of operation.
The SiC whisker is the bigger monocrystal of a kind of draw ratio, its intensity approaches the theoretical meter of SiC hot strength true value 6.9GPa, and its average diameter is 0.6 μ m, the length range broad is distributed among the 50-100 μ m in a large number, the material that this draw ratio is bigger is evenly distributed in ceramic matrix material or the metal matrix material at random, can significantly improve the tensile strength and the fracture toughness of these matrix materials, so the SiC whisker has become the reinforcing agent of manufacturing high temperature resistant, erosion resistant, high strength and light composite material.
The SiC whisker can be with rice husk or carbon black and SiO
2Make raw material, obtain coarse fodder, remove in the sintering coarse fodder and contain SiC whisker (SiC-w), also have SiC particle (SiC-P), residue carbon (C) and micro-SiO through sintering
2Particle, back three and SiC whisker mix, can reduce performance of composites, in order to guarantee the high-performance of composite, must bring up to the grade of SiC whisker more than 97%, just can reach the requirement of high-tech area composite reinforcing agent, and SiC particle (SiC-P) that is separated or SiC particle and a small amount of SiC whisker (SiC-P+SiC-w) mixture, also can be used to do the reinforcing agent of general composite.
At present, from the sintering coarse fodder, obtain the high-grade Sic crystal whiskers great majority and adopt reverse flotation method, promptly utilize the hydrophily of SiC-w and the hydrophobicity of the rich carbon of SiC-P, making SiC-P and carbon become froth pulp is separated, be that SiC-w becomes product from failing, it adds water after the sintering coarse fodder is pulverized and regulates pulp density and add medicament to adopt the reverse flotation separating technology exactly as the method for introducing in the US4293099 patent, under acid condition, carry out reverse flotation, adopt one roughing and recleaning operation, roughly select with naphtha and make collecting agent, pine tar is made foaming agent, and collecting agent made by selected employing naphtha and MIBC makes foaming agent.The shortcoming of this method is that the product grade of SiC-w has only 90%, does not reach the requirement of high-tech area composite reinforcing agent, therefore will further purify, but the whisker loss is big, and rate of recovery generation, adopt the acid medium flotation, equipment corrosion is serious, and operation is also complicated.
Purpose of the present invention is just in order to overcome the shortcoming and deficiency that above-mentioned prior art exists, and provide a kind of flotation and gravity treatment combined separation technology, can obtain high-grade Sic-w product, be used as the reinforcing agent of high-tech area composite, and separated byproduct SiC-P or SiC-P add the reinforcing agent that a small amount of SiC-w mixture is used as general composite, thereby the SiC whisker is rationally utilized, increase economic efficiency and use value.
The objective of the invention is to realize by following technical proposal:
Technical scheme of the present invention is on the basis of reverse flotation, has changed the reverse floatation process condition, has adopted the cyclone group of gravity treatment or the integration of operation of rapid table or direct flotation to reach desirable separating effect to flotation tailing simultaneously.
Obtain the separating technology of high-grade Sic crystal whiskers, comprise with rice husk or carbon black and SiO
2Be the SiC sintering coarse fodder of feedstock production,, regulate pulp density adding medicament and carry out reverse flotation, it is characterized in that through pulverizing:
A), after the sintering coarse fodder pulverizes, water two steps joint pulp density adds beneficiation reagent and stirs in the dense ore pulp of the first step, and then rare accent pulp density;
B), carry out reverse flotation after sizing mixing, reverse flotation is by one roughing, and the operation of scanning of primary cleaning and primary cleaner tailing is formed;
C), selected foam is the mixture of SiC particle (representing with SiC-P) and carbon (c) in (b) item, obtain the SiC-P byproduct through burning except that behind the carbon elimination, the product of scanning of cleaner tailings returns selected operation, its mine tailing is that intermediate products are represented with chats 1, use again cyclone fraction from, obtain coarse grain SiC-P respectively, chats II and SiC whisker major product (representing), three kinds of materials with SiC-w;
D), the rougher tailings in (b) can adopt cyclone fraction from, obtain SiC crystal whisker products SiC-w
2Expression, three kinds of materials of coarse granule SiC-P and chats II ';
E), SiC-w in (c) item
1(d) the Xiang Zhongyong cyclone fraction from SiC-w
2After sizing mixing, handle with key player on a team's float method again and obtain high-grade Sic-w and chats III; (c) SiC-w in the item
1(d) Xiang Zhongyong direct flotation method is handled the SiC-w that obtains
2
F), high-grade Sic-w product in (e), handle high-grade Sic crystal whiskers (SiC-w) product that can obtain size fractionated with rapid table again;
G), the chats II ' among the chats II in (c), (d) and (e) in chats III mix the available rapid table in back and handle, obtain the thicker SiC crystal whisker products (SiC-w) of diameter, chats III and three kinds of things of SiC-P, its chats returns processing again.
(b) the also available direct flotation method of the rougher tailings in the item is handled, and obtains SiC whisker SiC-w
2With two kinds of materials of chats II ';
(c) SiC-w in the item
1(d) Xiang Zhongyong direct flotation method is handled the SiC-w that obtains
2, also available cyclone fraction from, all can obtain high-grade SiC-w product, chats III and SiC-P product.
Two steps joint pulp density, the first step is dense accent ore pulp, and its concentration is 10-20wt%, and the time is 5-40min; Second step was rare accent ore pulp, and its concentration is 0.1-1.0wt%, and the time is 5-10min, its reverse flotation condition is: the ore pulp medium is for neutral, and dispersant is ethanol, sodium hexametaphosphate or sodium metasilicate, and collecting agent is a naphtha, or kerosene, foaming agent is the C6-C9 alcohols, ether alcohol class, pine tar and MIBC.
The cyclone group is by n the cyclone arranged in series that diameter is different, its n=1-4, the cyclone group is arranged diameter and is reduced successively, as by 75,50,25, four of 10mm reduce the diameter cyclone successively and form, or by 50,25, three diameter cyclones that reduce successively of 10mm form, the rest may be inferred, can determine diameter as required during with a cyclone, the cyclone cone angle is 20-10 °, and feed pressure is 0.2-1.0Mpa.
Rapid table is regulated the diameter of whiskers distribution homogeneous state in each product easily, is suitable for Treatment of Middling, and jig frequency is 2000-500 time/min, and stroke comes 3-7mm, and the bed surface inclination angle is 0-5 °
Rapid table also can be exchanged with the cyclone group and be used.
The direct flotation condition is ore pulp PH=3.0-5.0, adopt organic collecting agent of anionic or the organic collecting agent of both sexes, its foam is a major product, mine tailing is a chats, perhaps adopt cationic organic collecting agent to carry out reverse flotation, foaming agent is methyl isobutyl carbinol (MIBC), C6-C9 alcohol, the organic collecting agent of anionic is an oleic acid, enuatrol, dodecyl sodium sulfate, sulfonation ether, cationic organic collecting agent is a field dish alkali, ether amine, dodecyl chlorination ammonium, dodecyl Ammoniom-Acetate, the organic collecting agent of both sexes are dodecyl-N-carboxymethyl-N hydroxyl imidazoline betaine.
Reverse flotation mine tailing also usage aperture is that the sieve of 0.2-0.1mm sieves processing, and its oversize is SiC-P, and screenings goes flotation operation to handle.
Separating technology of the present invention, adopting reverse flotation is the hydrophobicity of utilizing carbon and rich carbon SiC particle, make it to become froth pulp, and the SiC whisker is stayed in the water, when dense accent ore pulp, add beneficiation reagent before the reverse flotation, can save medicament and make medicament and the material full contact, for material is fully disperseed in water, adding water again, ore pulp is diluted to concentration is 0.1-1.0wt%, reverse flotation adopts the flotation conditions of neutral medium, minimizing improves the rate of recovery simultaneously to the corrosion of equipment in the separation process of SiC whisker, improve the quality of products.
Select material for difficulty, above-mentioned separating technology obtains SiC-w
1And SiC-w
2Product when its product grade does not reach quality requirement, can adopt the direct flotation method to handle, with SiC-w
1And SiC-w
2Mix and to send into tank diameter and add to be used as medicine and size mixing, carry out flotation, the PH of SiC particle by the surperficial charged symbol of whisker and particle and the difference of current potential then
PZC=2.7, the zero point of SiC whisker has two: PH
PZC=1.7 and PH
PZC=5.3, with hydrochloric acid (being advisable) pH value of ore pulp is transferred to 3.0-5.0 with 6N, be good with PH=4.0-4.5, at this moment, SiC whisker surface lotus positive electricity, SiC particle surface bear, so carry out reverse flotation with organic collecting agent of anionic or the organic collecting agent of both sexes, its foam is the SiC crystal whisker products; Carrying out its froth pulp of reverse flotation with cationic organic collecting agent is the SiC particle, and mine tailing is the SiC crystal whisker products.Above-mentioned processing method all can make difficulty select material to obtain the high-grade Sic crystal whiskers product, and its direct flotation is made up of one roughing once purging selection and primary cleaning operation.
Separating technology of the present invention, adopt cyclone group or rapid table to separate, it is a kind of gravitational separation equipment simple to operate, rapid table makes the mixed material of SiC whisker and SiC particle, under the comprehensive function of mechanical force and current, divide into groups and sorting by the difference of diameter, shape and density, it can use SiC whisker grade to bring up to 97% by 95%, selects the product of grade 90% from grade 75-85% chats.
The also available sieve of reverse flotation mine tailing is handled as vibratory sieve, the result who obtains too, and simplified flow process.
Owing to take technique scheme, make the technology of the present invention compared with the prior art have following advantage and effect:
A), good separating effect, improve the rate of recovery, can obtain the high grade product of SiC whisker grade more than 97%;
B), flow process is applied widely;
C), adopt twice concentration of sizing mixing, and in underflow, add medicament, can save medicament, thin pulp carries out flotation can improve SiC whisker grade;
D) product category is many, and purposes is wide, comprehensive benefit good;
E) simple to operate, equipment compatibility is good.
Description of drawings
Fig. 1 is used for easily selecting the separation process scheme figure of material;
Fig. 2 is SiC-w among Fig. 1
1And SiC-w
2Product direct flotation separation process scheme figure;
Fig. 3 is high-grade Sic crystal whiskers rapid table packet transaction process chart;
Fig. 4 be in mining rapid table processing technological flow figure;
Fig. 5 is used for the separation process scheme figure that difficulty is selected material.
Embodiment further specifies the technology of the present invention below in conjunction with accompanying drawing:
Fig. 1 is used for easily selecting the separating technology of material, sintering coarse fodder product is carried out dense sizing mixing after crushed, concentration is 15-18Wt%, the time 20-25min that sizes mixing, and add alcohol dispersant, naphtha collecting agent, the MIBC foaming agent, add after stirring that water is rare sizes mixing, concentration is 0.2-0.5wt% again, and time 5-8min sizes mixing, carry out reverse flotation at neutral medium, the froth pulp that reverse flotation is roughly selected operation carries out once selected again, and froth pulp is SiC-P+C, and cleaner tailings is scanned once again, its foam returns selected operation, scan mine tailing and be chats I and be connected into the cyclone group with two cyclones and separate, obtain coarse grain SiC-P respectively, chats II and SiC-w
1Product, contain the SiC whisker seldom in the mixture of selected foam SiC-P and carbon (C), generally has only 1-2%, remove carbon elimination through burning and obtain the SiC-P byproduct, and scan the intermediate products that mine tailing is chats I, contain the SiC whisker and can reach 70-80%, using cyclone fraction again is 25mm and the series connection of 10mm cyclone from, cyclone group by two diameters, feed pressure 0.8Mpa, 15 ° of cone angles when mine tailing is squeezed into first cyclone feeding mouth, separablely go out two products, underflow is coarse granule SiC, overflow when the overflow of first cyclone enters second cyclone feeding mouth, continues to isolate two products based on whisker, the rest may be inferred, when using two cyclones, obtain three kinds of products, the SiC whisker grade that obtain this moment is 75-85%.
The SiC whisker grade of rougher tailings is higher, is generally 85-90%, contains small quantities of particles, by the quantity with the control chats, can guarantee the grade of rougher tailings SiC-w.Cleaner tailings adopt another group cyclone fraction from, its condition is ditto described, also obtains three kinds of products, i.e. coarse grain SiC-P, in, chats II ' and SiC-w
2Product, SiC-w at this moment
2Grade can reach more than 97%, meets the demands fully.
Select material with Fig. 1 flow processing difficulty, can will obtain SiC-w among Fig. 1
1And SiC-w
2Sending into the tank diameter dosing sizes mixing, as shown in Figure 2, carry out direct flotation by the surperficial charged symbol of whisker and particle and the difference of current potential then, PH=4.0-4.5 sizes mixing, with organic collecting agent of anionic such as oleic acid, the MIBC foaming agent, through one roughing, primary cleaning and once purging selection operation are handled, and its foam is a crystal whisker products, and its whisker content can reach the high grade product of 97-98%, selected is chats III with scanning mine tailing, also available rapid table is carried out the size fractionated separation with the SiC-w product of grade 97-98%, can obtain the SiC-w of 0.2-1.0 μ m, 1.0-2.0 μ mr SiC w and the SiC-w product of 2.0 μ m, as shown in Figure 3, the rapid table jig frequency is 800 times/min, stroke 4mm, 2 ° at bed surface inclination angle also can make centering ore deposit II with this shaking table, II ' separates with chats III, shown in Figure 4, it is that 95% crystal whisker products continues to bring up to 97% again that rapid table can make grade, brings up to 90% grade product from the chats of grade 75%-80%.
Select raw material for difficulty, also can be by Fig. 5 flow processing, the concentrate of roughly selecting of reverse flotation still separates with Fig. 1 flow process left side flow process, obtains SiC-w, and the direct flotation of whisker is directly carried out in its flotation tailing dosing, and its selected foam is SiC-w
2With chats II ' (flotation tailing), chats II ' sends into cyclone fraction again from, SiC-w
2Handle with cyclone group or rapid table, also can obtain satisfied result, promptly the SiC-w grade can reach more than 97%, and other condition is with above-mentioned flow process.
In a word, technological process of the present invention can be formulated separation process according to the complexity of raw material separation and the interchangeability of equipment, reaches the high-grade Sic product.
Claims (11)
1, obtains the separating technology of high-grade Sic crystal whiskers, comprise with rice husk or carbon black and SiO
2Be the SiC sintering coarse fodder of feedstock production,, regulate pulp density adding medicament and carry out reverse flotation, it is characterized in that through pulverizing:
A), after the sintering coarse fodder pulverizes, water two steps joint pulp density adds beneficiation reagent and stirs in the dense ore pulp of the first step, and then rare accent pulp density;
B), carry out reverse flotation after sizing mixing, reverse flotation is by one roughing, and the operation of scanning of primary cleaning and primary cleaner tailing is formed;
C), selected foam is the mixture of SiC particle (representing with SiC-P) and carbon (c) in (b) item, obtain the SiC-P byproduct through burning except that behind the carbon elimination, the product of scanning of cleaner tailings returns selected operation, its mine tailing is that intermediate products are represented with chats I, use again cyclone fraction from, obtain coarse grain SiC-P respectively, chats II and SiC whisker major product (are used SiC-w
1Expression), three kinds of materials;
D), the rougher tailings in (b) can adopt cyclone fraction from, obtain SiC crystal whisker products SiC-w
2Expression, three kinds of materials of coarse granule SiC-P and chats II ';
E), SiC-w in (c) item
1(d) the Xiang Zhongyong cyclone fraction from SiC-w
2After sizing mixing, handle with key player on a team's float method again and obtain high-grade Sic-w and chats III; (c) SiC-w in the item
1(d) Xiang Zhongyong direct flotation method is handled the SiC-w that obtains
2
F), high-grade Sic-w product in (e), handle high-grade Sic crystal whiskers (SiC-w) product that can obtain size fractionated with rapid table again;
G), the chats II ' among the chats II in (c), (d) and (e) in chats III mix the available rapid table in back and handle, obtain the thicker SiC crystal whisker products (SiC-w) of diameter, chats III and three kinds of things of SiC-P, its chats returns processing again.
2, separating technology according to claim 1 is characterized in that: (b) the also available direct flotation method of the rougher tailings in the item is handled, and obtains SiC whisker SiC-w
2With two kinds of materials of chats II '.
3, separating technology according to claim 1 is characterized in that: (c) SiC-w in the item
1(d) Xiang Zhongyong direct flotation method is handled the SiC-w that obtains
2, also available cyclone fraction from, all can obtain high-grade SiC-w product, chats III and SiC-P product.
4,, it is characterized in that the process conditions of reverse flotation are according to claim 1 or 2 or 3 described separating technologies: two steps joint pulp density, the first step is dense accent ore pulp, and its concentration is 10-20wt%, and the time is 5-40min; Second step was rare accent ore pulp, and its concentration is 0.1-1.0wt%, and the time is 5-10min.
5, according to claim 1 or 2 or 3 described separating technologies, it is characterized in that the process conditions of reverse flotation are: the ore pulp medium is for neutral, and dispersant is ethanol, sodium hexametaphosphate or sodium metasilicate, collecting agent is a naphtha, or kerosene, foaming agent is the C6-C9 alcohols, ether alcohol class, pine tar and MIBC.
6, according to claim 1 or 2 or 3 described separating technologies, it is characterized in that the cyclone group by n the cyclone arranged in series that diameter is different, its n=1-4, the cyclone group is arranged diameter and is reduced successively, the cyclone cone angle is 20-10 °, and feed pressure is 0.2-1.0Mpa.
7, it is characterized in that according to claim 1 or 2 or 3 described separating technologies the jig frequency of rapid table is 2000-500 time/min, stroke comes 3-7mm, and the bed surface inclination angle is 0-5 °
8, according to claim 1 or 2 or 3 described separating technologies, it is characterized in that the direct flotation condition is: ore pulp PH=3.0-5.0, adopt organic collecting agent of anionic or the organic collecting agent of both sexes, its foam is a major product, mine tailing is a chats, perhaps adopt cationic organic collecting agent to carry out reverse flotation, foaming agent is methyl isobutyl carbinol (MIBC), C6-C9 alcohol.
9, separating technology according to claim 8, it is characterized in that the organic collecting agent of anionic is an oleic acid, enuatrol, dodecyl sodium sulfate, sulfonation ether, cationic organic collecting agent are field dish alkali, ether amine, dodecyl chlorination ammonium, dodecyl Ammoniom-Acetate, the organic collecting agent of both sexes are dodecyl-N-carboxymethyl-N hydroxyl imidazoline betaine.
10, according to claim 1 or 2 or 3 described separating technologies, it is characterized in that the reverse flotation mine tailing also can directly separate with the sieve screening, its oversize is SiC-P, screenings goes flotation operation to handle.
11, separating technology according to claim 10 is characterized in that the sieve aperture is 0.2-0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94117781A CN1048659C (en) | 1994-11-10 | 1994-11-10 | Separation process for obtaining high-grade SiC crystal whiskers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94117781A CN1048659C (en) | 1994-11-10 | 1994-11-10 | Separation process for obtaining high-grade SiC crystal whiskers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1116967A CN1116967A (en) | 1996-02-21 |
| CN1048659C true CN1048659C (en) | 2000-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94117781A Expired - Fee Related CN1048659C (en) | 1994-11-10 | 1994-11-10 | Separation process for obtaining high-grade SiC crystal whiskers |
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| Country | Link |
|---|---|
| CN (1) | CN1048659C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032895A (en) * | 2015-07-17 | 2015-11-11 | 山东省地质科学研究院 | Method for extracting superfine nonmetallic composite from altered rock type gold tailings |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4293099A (en) * | 1979-07-02 | 1981-10-06 | Silag, Inc. | Recovery of silicon carbide whiskers from coked, converted rice hulls by froth flotation |
-
1994
- 1994-11-10 CN CN94117781A patent/CN1048659C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4293099A (en) * | 1979-07-02 | 1981-10-06 | Silag, Inc. | Recovery of silicon carbide whiskers from coked, converted rice hulls by froth flotation |
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| Publication number | Publication date |
|---|---|
| CN1116967A (en) | 1996-02-21 |
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