• 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:
    Prodn. of non-dusting K fertiliser granules resistant to abrasion comprises subjecting the granules, after the actual granulation process, to (a) dust removal in a fluidised bed; (b) wetting with water and (c) hardening the surface by a recrystallisation process using the heat capacity of the granules. Dust removal is pref. at air velocity 1-4m/s in the fluidised bed, then the granules wetted with 0.5-2, esp. 1% water. The wetted granules are then dried and cooled at around room temp. in a fluidised bed to residual moisture content 0.1-0.2%. Minimal dust formation during transport and storage (esp. in loose heaps.).
    公开号:SU998450A1
    申请号:SU797770582
    申请日:1979-05-16
    公开日:1983-02-23
    发明作者:Тител Вольфганг；Леиб Герхард；Кале Клаус；Штрубе Манфред
    申请人:Феб Комбинат Кали (Инопредприятие)；
    IPC主号:
    专利说明:

    11 only a small part of the adhering dust is dissolved. In addition, the dissolved amount of adhering dust after drying is again obtained in the form of fine crystals, so that the non-burning properties of the treated product are not improved. There is a method of separating the bottom product fractions (microgranular fractions) by sieving. The forces acting during the classification by sieving, however, are not sufficient to remove the smallest solid particles from the surface of the granules, so that the fraction of the smallest grains after sieving can still be up to 0.4%. Processing the product in this way is still hot. There is a method of firmly adhering dust particles to the surface of the granules by adding organic substances prone to polymerization. Its disadvantage is the fact that in order to achieve the effect of dust sticking to the granules, relatively large quantities of these substances must be applied. In addition, they have a negative effect on other consumer properties of granulated products. In addition, there is a known method, which consists in the fact that already in place the particles of the granulated product are subjected to mechanical effects, similar to the effects during subsequent transportation and overload, with the formation of artificial fines and the separation of this smallest fraction by means of control augmenting. In practice, however, it turned out that, under the conditions of transportation and handling, there is still dust generation due to abrasion. The chain of the invention is to eliminate the drawbacks caused by insufficient strength, abrasion of granulated products, such as, for example, intensive dusting of the latter in the processes of handling and transportation, and improving the consumption properties in terms of abrasion and dust formation. The basis of the invention is to improve the abrasion resistance of granular products in order to ensure that the fraction of the fine fraction during transportation and handling is not drastically reduced and therefore there is no dusting of the products. It has been found that it is possible to produce non-stick and non-dry fertilizer fertilizers if potash fertilizers are subjected to additional processing after the process; s grails. The combined application of technological methods of dedusting a granulated product by treating the surface of a product with water or water additives, drying using the heat capacity of a granulated product coming from its own temperature of 40-80 ° and subsequent cooling results in such non-dusty and non-rubbing potassium fertilizer granules. which so far by known methods have never been obtained. The use of only one of the listed methods or their incomplete implementation does not give a satisfactory improvement in terms of abrasion and dust formation of granular products. An integral feature of the invention, therefore, is the combined implementation of several techniques. According to the invention, the first technique is that the dust particles adhering to the granules of potash fertilizers are removed by means of strong air jets under the fluidized bed conditions. Then, in the second technological intake, the granules dedusted in the fluidized bed are moistened with water or aqueous additives in order to eliminate unstable ends and edges, which again would lead to the formation of fines. Due to the preliminary dedusting of the product in the fluidized bed, the amount of added water is 0.5-2%. In the third technological acceptance, using the heat capacity of the granulated product or using jets of heated air, the predominant part of the solution is evaporated, wetting the granular product, and hardening the surface of the granules as a result of recrystallization processes. The granular product is then cooled to approximately ambient temperature. The process is controlled in such a way that on-. the surface of the granules still leaves the remainder of the water, preferably 0.10, 2%. This residual moisture binds the fine-grained fraction that is formed during the transportation and handling processes on the way to the consumer. As a result of the addition of organic substances, predominantly Mineral oils, it is possible to slow down the evaporation of residual second water and to further provide additional bonding of dust during the formation of secondary dust. An example. The granular pro- duct - potassium fertilizer g is subjected to oily sprinkling in a fluidized bed with the help of strong air jets before being loaded into cars. The boiling time required to blow off dust from the granulated product depends on the amount of adhering dust, the amount of air that makes up the usual size of potash fertilizer granules, 2-3 m / s, and on the amount of product passed through and is within at least 5s. . Then, at the mixing site, the wetting takes place from 0.5-2.0%, preferably 1% / water, and its uniform distribution over the entire surface of the granulated product. After processing, the latter is dried with the help of strong air jets heated in case of need and cooled by air, and drying, as well as cooling in a fluidized bed, is carried out in such a way that a fine fraction is released in accordance with the desired interface. This process should be adjusted so that the residual moisture on the granules is predominantly 0.1-0.2%. The process of conditioning the granulated product ends with the addition of organic substances, predominantly mineral oils, in an amount of 0.2-1.0 g / kg, which can be done by spraying the substance in the outlet of the fluidized bed. Table :. 1 shows the results of processing the granulated product with the indicated technological methods. Table 1 Dust formation index is determined according to TGL 29 621, Abrasion index according to the draft of the plant standard of the GKP Combine, Zondershausen (but in 1972). In tab. Figure 2 shows samples of the granulation product, which, after dedusting in a fluidized bed, were treated with water and, after drying, contained still residual moisture. When machining in a rotating drum after 10 minutes, contained newly formed fines. .Tablitsa 2 Granulated product, untreated, dust-free 0.38 Granulated product, treated with 1% water, residual moisture 0.1% 0.2
    18
    1.1-3.5
    18
    0.5
    0.4
    12
    0.2
    权利要求:
    Claims (5)
    [1]
    1. A method for producing non-dusting, non-abrasive granular potash fertilizers, characterized by the fact that the granulated grain fertilizer after the process of grains. The nullings are processed in several combined techniques, which consist in the fact that granulated potash fertilizer is first dedusted in a fluidized bed, then at a temperature of 40-80 ° C granulated product is moistened with water in an amount of 0.52%, after which it is dried granulated product syldshdki, if necessary, heated air jets and its cooling to ambient temperatures.
    [2]
    2. The method according to claim 1, about the fact that dust removal
    the granulation product is carried out in the Kj nHiueM layer at air jet velocities of preferably 1-4 m / s.
    [3]
    3. The method according to claim. 1, characterized in that the dust-free
    The granulated product is moistened with water in an amount of 1%.
    [4]
    4. The method according to claim 1, in which the granulated product is dried to a residual moisture content of 0.1-0.2%.
    [5]
    5. The method according to claim 1, which is based on the fact that after treatment with water or in parallel with it, the air conditioning of the product is carried out with organic substances, mainly mineral oils.
    It is recognized as an invention according to the results of the examination carried out by the Office for the Invention of the German Democratic Republic.
    类似技术:
    公开号 | 公开日 | 专利标题
    US3711254A|1973-01-16|Potash granulation
    US2926079A|1960-02-23|Process for production of fertilizer pellets
    US3544296A|1970-12-01|Method of forming a solid plant nutrient from leonardite humate bearing ore
    US2723954A|1955-11-15|Method of treating sewage slurry
    SU998450A1|1983-02-23|Proces for producing non-dusting non-abrading granulated potassium fertilizers
    US2631084A|1953-03-10|Ammonium sulfate production
    BE1007521A5|1995-07-25|Method for preventing formation of dust during loading or unloading and transport of granulated fertilizer sulfates.
    US2391116A|1945-12-18|Method of producing granular adsorbent
    US2867523A|1959-01-06|Ammonium sulfate production
    US2798301A|1957-07-09|Process for drying ammonium nitrate prills
    US2917381A|1959-12-15|Process of flaking and granulating ammonium sulphate
    SU1039932A1|1983-09-07|Process for producing non-caking potassium chloride
    US1949181A|1934-02-27|Sewage disposal
    SU1108071A1|1984-08-15|Method of dedusting potassium chloride
    US2155372A|1939-04-18|Process for the production of fertilizers
    RU2200710C1|2003-03-20|Method for production of granulated calcium chloride
    SU1477727A1|1989-05-07|Fertilizer conditioning process
    SU1346573A1|1987-10-23|Method of lumping phosphate raw material
    SU1017698A1|1983-05-15|Method for producing non-caking and non-dusting fine-grained mineral fertilizers
    US2792288A|1957-05-14|Method for producing granular solids
    SU1079609A1|1984-03-15|Process for producing sodium chloride
    US1768282A|1930-06-24|Powdered metallic chloride and method of making same
    SU952830A1|1982-08-23|Method for producing granulated potassium chloride
    PL236819B1|2021-02-22|Method for producing agglomerate from the tanning shavings
    PL238881B1|2021-10-18|Method for producing agglomerate from the tanning shavings
    同族专利:
    公开号 | 公开日
    DE2919773A1|1980-01-24|
    DD136956A1|1979-08-08|
    FR2427130A1|1979-12-28|
    DD136956B1|1981-09-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3918524C2|1989-06-07|1995-08-10|Kali & Salz Beteiligungs Ag|Process for binding dust in granules|
    DE4127572C1|1991-08-21|1993-03-11|Kali Und Salz Ag, 3500 Kassel, De|
    DE4232567C1|1992-09-29|1994-02-10|Kali & Salz Ag|Granular sulphate fertiliser treatment to prevent dust formation during bulk transformation - comprises spraying with conc. urea soln.|
    DE10252848B3|2002-11-13|2004-03-25|Kali-Umwelttechnik Sondershausen Gmbh|Preparing potassium fertilizer granules comprises treating crude granulate with silicate or carbonate solution, then vibrating mixture|
    RU2674974C1|2015-01-28|2018-12-13|Машиненфабрик Кёпперн Гмбх Унд Ко. Кг|Method of conditioning granular fertilizer ; method of producing granulated fertilizer; device for conditioning granular fertilizer|
    DE102015101199A1|2015-01-28|2016-07-28|Maschinenfabrik Köppern GmbH & Co KG|Process for conditioning fertilizer granules|
    DE102015115468A1|2015-09-14|2017-03-16|Maschinenfabrik Köppern GmbH & Co KG|Process for conditioning fertilizer granules|
    DE102016112595A1|2016-07-08|2018-01-11|Maschinenfabrik Köppern Gmbh & Co. Kg|Process for the aftertreatment of multi-nutrient fertilizer granules|
    DE102017007105A1|2017-07-28|2019-01-31|K + S Kali Gmbh|Process for increasing the mechanical stability of potassium chloride compactates|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD20571278A|DD136956B1|1978-06-01|1978-06-01|METHOD FOR PRODUCING NON-DUSTING ABRASIVE CALIDUIN AGENT GRANULES|
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