• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A process and a composition for recovering coal from raw coal which comprises subjecting the raw coal, in the form of an aquous slurry or pulp, to a flotation process in the presence of a frother which comprises the reaction product of an aliphatic alcohol having from 4 to 6 carbon atoms, preferably 6 carbon atoms and from 1 to 5 moles of propylene oxide, butylene oxide or mixtures thereof.
    公开号:SU1473699A3
    申请号:SU864027002
    申请日:1986-02-03
    公开日:1989-04-15
    发明作者:Д.Хансен Роберт；В.Бергман Роджер；Р.Климпел Ричард
    申请人:Дзе Дау Кемикал Компани (Фирма)；
    IPC主号:
    专利说明:

    one
    This invention relates to the beneficiation of minerals.
    The purpose of the invention is to increase the recovery of useful components.
    SUMMARY OF THE INVENTION The essence of the invention is a method for separating coal from raw coal by treating this raw coal in the form of its aqueous suspension in the flotation process, carried out with the addition of a blowing agent, characterized in that said blowing agent is
    is a reaction product of an aliphatic alcohol containing 6 carbon atoms, with 1-5 mol of propylene oxide, butylene oxide or mixtures thereof, as well as in a froth flotation composition for separating coal from raw coal, which includes the reaction product of an aliphatic alcohol containing 4 -6 carbon atoms, with 1-5 mol of propylene oxide, butylene oxide or mixtures thereof.
    OS 0 X CD
    S
    Blowing agents meet the general formula
    R, -0- (CHKi-CHRz - ()) n-H,
    where R, is a straight or branched hexyl radical containing 6 carbon atoms,
    R is independently hydrogen, methyl, or ethyl in each case;
     is an integer, Provided that one of the radicals R in each link is methyl or ethyl, and also provided that in the case when one of the radicals Kg in the link is ethyl, the other radical in this link must be hydrogen atom. R, in a preferred embodiment, is hydrogen or methyl. Preferred values of n are 1-3, integers, the most preferred value being 2. When propylene oxide is used as alkylene oxide, in each repeating unit of the above formula one of the symbols R2 must be methyl, and the other symbol R2 must be a hydrogen atom . The proposed blowing agents can be obtained by contacting the alcohol with an appropriate molar coli. Experimental procedure. The main coal to be tested is the bituminous pittsky coal in a slightly oxidized state, which is a good test coal for the quality of the reagents and compositions since this coal exhibits
    by the use of propylene oxide, butylene oxide, or their mixtures in the presence of alkaline typical (medium) carbon catalysts, in particular the hydrofloat characteristics of alkali metal oxide, amine or boron trifluoride. Typically, the catalyst can be used in coli. After the coal is injected, it is passed through a jaw crusher, and the crushed coal is then classified through a 700 µm sieve. The coarse fraction is sent to a hammer mill. Then both streams of material are combined;
    the amount of 0.5-1 wt.% of the total weight of the reagents. In most cases, this reaction can be carried out at temperatures up to 150 ° C and pressure up to
    After entering the coal, it is passed through a jaw crusher, and then the crushed coal is classified through a sieve with a mesh size of 700 microns. The coarse fraction is sent to a hammer mill. Then both streams of material are combined.
    689 kPa. In this case, when used, after which the mixture of propylene oxide and butylene-45 is sequentially made up, it is packaged into 200-gram packages of propylene oxide and butylene oxide can be added simultaneously or sequentially.
    The use of these foaming compositions provides efficient flotation of large particles of coal. Coarse particles of coal in this case are particles with sizes of 500 microns or more (+35 mesh). The proposed blowing agents not only effectively provide the flotation of coarse particles of coal, but also effectively float medium and small particles of coal. Application of Foaming Compounds55
    ki and stored in glass jars. The ash content determined by the weight loss on ignition at 750 ° C is 27.5%. For testing, two large portions of coal are prepared, the sieve analysis of which shows that 15, -5% is the share of particles with sizes above 500 µm, 53.5% of particles have sizes from 500 to 88 µm, and the proportion of particles with a size less than 88 microns is 31.0%.
    The flotation process is carried out in a single Galigher Agitair® flotation cell. The volume of the flotation cell of the invention allows a 2% or more increase in the separation of coarse particles in comparison with what is achieved using, for example, methyl isobutylcarbonyl (MIBK) or an adduct of propanol and propylene oxide as a blowing agent. According to the proposed option is achieved 10%
    JQ is an increase in selectivity, and, by more preferable, a 20% increase in the selectivity of coal particles.
    During the froth flotation of hl, for example, kerosene, diesel fuel, liquid fuel, etc. can be used as collectors. In addition, mixtures of known collectors can also be used.
    Example 1. For coal flotation
    2Q, the proposed foaming compositions together with several known blowing agents used at the rate of 0.1 kg of blowing agents per ton of raw coal, and additionally added 0.5 kg of collector, product Soltrol R, per ton of raw coal.
    The experiment procedure. The main coal to be tested is the bituminous pittsburgh coal in a slightly oxidized state, which is a good test coal for assessing the qualities of reagents and compositions, since this coal exhibits perfect
    thirty
    35 Synamenous Typical (Medium) Carbon Flotation Characteristics Shenno Typical (Medium) Carbon Flotation Characteristics
    After entering the coal, it is passed through a jaw crusher, and then the crushed coal is classified through a sieve with a mesh size of 700 microns. The coarse fraction is sent to a hammer mill. Then both streams of material are combined, mixed, and then sequentially packaged in 200 gram packs.
    Sew, and then sequentially packaged in 200-gram packs
    ki and stored in glass jars. The ash content determined by the weight loss on ignition at 750 ° C is 27.5%. For testing, two large portions of coal are prepared, the sieve analysis of which shows that 15, -5% is the share of particles with sizes above 500 µm, 53.5% of particles have sizes from 500 to 88 µm, and the proportion of particles with a size less than 88 microns is 31.0%.
    The flotation process is carried out in a single Galigher Agitair® flotation cell. The volume of the flotation cell is 3000 ml, and it is equipped with a single-blade scraper for the mechanical removal of foam, which rotates at a speed of 10 rpm. The level of sludge is maintained with a device for maintaining a constant level, which, as this level of sludge decreases, supplies water. A 200 g sample of carbon is conditioned in 1800 ml of deionized water for 6 minutes with a stirrer rotating at 900 rpm. At this point, the pH is measured, which is usually 5.1. After a 6-minute conditioning period, a collector (Soltrol product, refined kerosene) is added, after a further one-minute conditioning, a blowing agent is added, and after another one-minute conditioning, air flow is started at a flow rate of 9 l / min and the scraper is turned on. The foam is collected after 3 turns of the scraper (0.3 min), after another 3 turns (0.6 min), after an additional 4 turns (1.0 min), and also after 2.0 and 4.0 minutes. The walls of the chamber and the scraper are washed with weak streams of water. The resulting concentrates and the tail fraction are dried overnight in an air oven, weighed, and then sieved through sieves with mesh sizes of 500 and 88 microns. Then, the ash content of each of the three screen fractions is determined. In cases where the fractions contain large amounts of material, the sample is divided into a grooved divider until a sufficiently small sample is obtained to determine the ash content. Then, for the cleaned coal, the weight versus time is calculated, as well as the ash content for each flotation experiment. The results are summarized in table. 1. R-4 min is an experimentally determined release associated with a 4-minute flotation process. The experimental error for R-4 min is ± 0.015.
    In tab. 1, 2, and 3; the abbreviation of MINK denotes methyl isobutyl carbinol; MIBK-2PO is a reactive product of methyl isobutylcarbinol and two equivalents of propylene oxide, and MIBK-ZPO is a reaction product of methyl isobyl tilcarbinol and three equivalents of propylene 0
    five
    0
    five
    oxide. In this description, the abbreviation DF-200 is used to designate the product DAUFROT 200 (the trade name of the product of the company Dow Chemical Company), which is propylene glycol methyl ether with an average molecular weight of 200; DF-400 refers to the product DAUFROT® 400 (the trade name of the product of the Dow Chemical Company), which is a polypropylene glycol with an average molecular weight of about 400; DF-1012 is a product of DAUFROT® 1012 (trade name of the product of the company Dow Chemical Company), which is a methyl ester of polypropylene glycol with an average molecular weight of approximately 400 j IPS-2PO is a reaction product of isopropyl alcohol with two equivalents of propylene oxide; TPGME-SHO is the reaction product of tripropylene glycol methyl ether and one equivalent of propylene oxide; TEB - triethoxybutane, phenol-4PO - the reaction product of phenol with four equivalents of propylene oxide; heptanol-2110 — a reaction product of heptanol with two equivalents of propylene oxide i pentanol-2PO — a reaction product of pentanol with two equivalents of propylene oxide; cyclohexanol-2PO is a cyclohexanol reaction product with two equivalents
    5 propylene oxide; hexanol-SHO-1EO is the reaction product of hexanol with one equivalent of propylene oxide and one equivalent of ethylene oxide. MIBK-2PO with MIBTS is a mixture of products MIBK-2PO and MIBK. 2-Ethylhexyl alcohol-2PO and 2-ethylhexyl alcohol-ZPO designates the reaction product, 2-ethylhexyl alcohol and two and three equivalents of propenoxy and, respectively, Hexanol-2PO, are used to denote the reaction product of hexanol with two equivalents of propylene oxide; 2-methylpentanol- 1: 2PO - to designate the reaction product of 2-methylpentanol and one and two equivalents of propylene oxide j isopropanol-2, 7PO - to designate the reaction product of isopropanol with two and seven equivalents of propylene oxide, n-butanol-2PO - to indicate the reaction product of n-butanol with two equivalents of propnlen oxide. Isobutanol-2PO refers to the reaction product isobu0
    and two equivalents of propylene oxide.
    From the data given in table. 1, it is seen that the increase in the yield of pure coal after flotation, i.e. portions A, of the total R value when using MIBK-2PO in comparison with the corresponding values for all other industrial compounds, are subjected to tests ranging from 6-64%.
    A more significant comparison between the MIBK and MIBK-2PO products in the total R value for the floated purified coal, i.e. p-A of A, shows an increase of 32%.
    Example 2. Analogously to Example 1, a series of experiments were carried out with froth coal flotation using the new foam compositions of the invention and other known blowing agents, except that in this case the concentration of the collector is 1.0 kg / ton of raw coal. The results are summarized in table. 2. Experimental error R-4 min is tO, 015.
    Example 3. Bituminous pittsburgh coal is subjected to froth flotation processing identical to that described in example 1. The results obtained are summarized in table. 3
    0
    five
    0
    five
    0
    five
    权利要求:
    Claims (4)
    [1]
    1. A method of froth flotation of coal from raw coal, including the treatment by the blowing agent of its aqueous suspension, characterized in that, in order to increase the extraction of useful components, a blowing agent containing the reaction product of aliphatic alcohol having 6 carbon atoms and 1-5 mol of propylene oxide is used, butylene oxide or
    their mixtures with the following cTpvKTypHoft formula:
    R, -0- (CHRz -CHR2-0-- nH,
    / where K, is a hexyl radical with a straight or branched chain separately in each case hydrogen, methyl or ethyl,
    an integer, provided that one of Rz is methyl or ethyl, or when one of R is ethyl, the other is hydrogen.
    [2]
    2. A method according to claim 1, characterized in that the blowing agent is used in an amount of 0.0025 to 0.25 kg / ton of raw coal.
    [3]
    3. The method according to claim 2, characterized in that the blowing agent is used in an amount of 0.005-0.01 kg / ton of raw coal.
    [4]
    4. A method according to claim 1, characterized in that the collector is additionally used.
    Rn
    Table 1
    And - the COAL cleared after flotatssh1; B - phthotac is exposed to an empty rock; C - forever ratio
    between the amounts of purified and refined flotation of the waste rock. Not in accordance with an embodiment of the invention. Selected particles with sizes above 500 microns.
    Selected particles with sizes from 500 to 88 cm. Selected particles with sizes less than 88 ppm.
    And - the enriched coal subjected to flotation, In - prnagngts flotation is empty breed; C is the jj value of the ratio between the quantities of enriched coal and flooded waste rock. Not in accordance with the invention.
    Selected particles whose size exceeds 500 microns.
    Selected particles whose size is in the range of from 500 to 88 kcc. Selected particles. Whose size is 88 microns "
    table 2
    A - floated enriched coal {B - empty rock floated C - value of the ratio between the quantities of enriched coal and flooded waste rock.
    2)
    not according to the invention. Selected particles larger than 500 microns.
    Selected particles whose size is in the range from 500 to S8 µm. selected particles, the size of which is less than 88 microns.
    T a b l and a e
    类似技术:
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    同族专利:
    公开号 | 公开日
    ES543843A0|1986-12-01|
    PL253787A1|1986-09-23|
    ZM4685A1|1987-02-27|
    YU120785A|1987-12-31|
    EP0185732A4|1986-07-29|
    CA1270074A|1990-06-05|
    EP0183825A4|1986-07-29|
    FI860482A|1986-02-03|
    FI860483A0|1986-02-03|
    FI860483A|1986-02-03|
    US4582596A|1986-04-15|
    NO860365L|1986-02-03|
    PH21771A|1988-02-24|
    EP0183825A1|1986-06-11|
    YU45734B|1992-07-20|
    AU563324B2|1987-07-02|
    NO860364L|1986-02-03|
    AU563323B2|1987-07-02|
    ZA854174B|1987-02-25|
    BR8506787A|1986-11-25|
    EP0185732B1|1988-11-30|
    WO1985005565A1|1985-12-19|
    EP0185732A1|1986-07-02|
    SU1416048A3|1988-08-07|
    PL253788A1|1986-07-29|
    DE3566506D1|1989-01-05|
    AU4496485A|1985-12-31|
    FI78242C|1989-07-10|
    PH22368A|1988-08-12|
    ES8701706A1|1986-12-01|
    EP0183825B1|1989-01-25|
    ZM4085A1|1987-02-27|
    FI78243B|1989-03-31|
    PL143783B1|1988-03-31|
    BR8506788A|1986-11-25|
    FI78243C|1989-07-10|
    YU120885A|1987-12-31|
    FI860482A0|1986-02-03|
    ZA854175B|1987-02-25|
    TR22698A|1988-04-08|
    TR22277A|1986-12-19|
    FI78242B|1989-03-31|
    PL143782B1|1988-03-31|
    AU4491985A|1985-12-31|
    WO1985005566A1|1985-12-19|
    DE3567822D1|1989-03-02|
    引用文献:
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/617,284|US4582596A|1984-06-04|1984-06-04|Frothers demonstrating enhanced recovery of coarse particles in froth floatation|
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