CN1297426A - 含尿素肥料的造粒方法 - Google Patents

含尿素肥料的造粒方法 Download PDF

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CN1297426A
CN1297426A CN99805148A CN99805148A CN1297426A CN 1297426 A CN1297426 A CN 1297426A CN 99805148 A CN99805148 A CN 99805148A CN 99805148 A CN99805148 A CN 99805148A CN 1297426 A CN1297426 A CN 1297426A
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urea
fertilizer
mixture
rotary drum
fabrication device
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罗宾·菲尼
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Airborne Industrial Minerals Inc
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    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05CNITROGENOUS FERTILISERS
    • C05C9/00Fertilisers containing urea or urea compounds
    • C05C9/02Fertilisers containing urea or urea compounds containing urea-formaldehyde condensates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/12Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic in rotating drums
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00Fertilisers characterised by their form
    • C05G5/10Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12Granules or flakes

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)
  • Treatment Of Sludge (AREA)

Abstract

将尿素直接结合至肥料粒子晶体的肥料制粒方法。本工艺包括引入液态尿素至晶体并快速冷却粒子混合剂,使尿素在粒子的晶体中再结晶。从而制成更坚固的粒子,得到坚固的预处理,缓释粒子和充分减少粉尘及制粒过程中控制的问题。

Description

含尿素肥料的造粒方法
技术领域
本发明涉及一种制造粒状肥料产品方法,特别涉及一种将尿素注入肥料材料并造粒成为粒子的方法。
背景技术
将肥料混合经处理过(典型的是喷雾或气雾处理)的尿素的方法已经在实际中使用。这种处理方式最不利的方面是由于尿素可溶于水,由于其普遍应用,许多成分随着雨水和灌溉等流失。这是一个昂贵而低效的过程。将尿素混合或结晶在肥料内部的产品和工艺被用来解决这个浪费问题。本发明解决本问题。
工业应用
本发明适用于肥料工业。
发明内容
本发明的一实施例的目的之一是提供一种经改进的关于将尿素与源液结合并注入肥料的产品和方法。
本发明的一实施例的进一步的目的是提供一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的硫酸铵源液;
将硫酸铵和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和硫酸铵混合形成混合剂;然后冷却该混合剂形成尿素硫酸铵颗粒。
为了促进微粒更易于在鼓中滚动,该鼓可以由橡胶、特氟纶、氯丁二烯橡胶和其他材料组成。
在看到粒状小球包含一由水晶结构的优点所造成的大量空隙空间事实后,该空间为尿素的再结晶提供一极为有用的容积。
与本发明的一实施例的进一步的目的相一致的是:提供一肥料颗粒,包含:
一钾粒子包含大约20%空的空隙空间;尿素处于该空间内。
根据可以用在本发明的实践中的尿素混合物的类型,例如包括甲醛尿素,尿素-正磷酸铵,尿素-多磷酸铵,等尿素形式。其他依化学适合的例子也可在本技术中使用。
本发明的一实施例的一更进一步的目的是提供一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的硫酸钾源液;
将硫酸钾和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和硫酸钾混合形成混合剂;然后冷却该混合剂形成尿素硫酸钾颗粒。
为提高原料的亲水性,可以添加表面活性剂。该表面活性剂充分降低肥料产品的表面张力,以使尿素可以流入肥料中。尿素和肥料的混合剂被冷却到尿素的熔点以上是有重大价值的,其结果是:尿素在肥料的基体中再结晶。
本发明的一实施例的更进一步的目的是提供一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的氯化钾源液;
将硫酸钾和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和氯化钾混合形成混合剂;然后冷却该混合剂形成尿素氯化钾颗粒。
尿素再结晶的内部基体被发现可以充分增加该种结构的粒子的可用的性质。有代表性的是:尿素支承的小球或粒子的破裂强度超过7千克。该特性的有益之处在于坚硬的粒子不产生大量的粉尘;不破裂,粉碎等。在发运过程中,提供一种在现有技术方法论基础上不可能有的可修改的溶度性和更容易使用的尿素。
本发明的另一目的是提供一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的硝酸钾源液;
将硝酸钾和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和硝酸钾混合形成混合剂;然后冷却该混合剂形成尿素硝酸钾颗粒。
总体上描述本发明之后,下面将通过附图对较好实施例举例说明。
附图简述
图1是实现本方法的设备的示意图
图2是内含有尿素再结晶的硫酸铵微粒的照片。
相似的标号在文件中表示相似的部件。
实施本发明的模型
根据图1,标号10表示肥料原料,该肥料原料可以是氯化钾、硫酸钾、硫酸铵及其他物质。原料10是从源液中提取,例如,一盘式粒化循环(未画出)。
原料10的粒度分布为大约3目至大约10目之间,该材料被引入转鼓制粒器12,适当的转鼓制粒器对技术是有帮助的。除了原料10被引入转鼓12,尿素混合液14的源液也被引入。该尿素可以以液态形式引入制粒器12,或者制粒器12可以充分加热以使尿素混合液中的尿素是液态的。作为进一步可能的替换,初始的原料可以充分加热导致尿素在混合液中熔化。
作为一可选择的步骤,根据内部的化学性质,一适合的表面活性剂16可以被引入制粒器12以便容易将液态尿素输送到肥料原料基体。该混合剂,被指示为标号18被引入冷却装置20。该装置可以包含另一个转鼓制粒器,流态化床或其他适合的使产品容易移动的冷却装置。为了促使原料产品中尿素的结晶,冷却液通过入口22以逆流方式被引入制粒器20。在冷却装置20内的冷却液可以包括在化学上呈惰性的任何液体。例如,空气可以被引入装置20来冷却尿素。结晶发生在尿素熔化温度以上的任何温度(典型是110℃),装置20中的冷空气将温度降至接近65℃以生产出离开装置的产品24。
旋转和倾斜转鼓制粒器12和/或20已被上述技术披露。上述参数需要依照原料的不同因素的性质来设定。
附图2照片显示的是产品24,展示的粒子在横断面上处于充分的球形状态。从横断面的测试中可以清楚:尿素在肥料的基体中结晶。如知道的一样,肥料粒子典型地有15%-25%的空隙容积。这提供了一个理想的机会来引入液态尿素使其在原料基体中完全再结晶。
从与尿素的结合中被发现重大的优点,例如包括,增加粒子的破裂强度。硫酸铵的粒子的破裂强度典型地为2千克至大约3千克,然而当尿素在基体中结晶,处理过的粒子的破裂强度总体上超过7千克。在使用氯化钾和硫酸钾的情况下,粒子在处理前的的破裂强度是大约2千克至大约3千克,尿素处理过的粒子被证明破裂强度约为7千克至8千克。
如下表证明,尿素迅速地溶解。加入氯化钾后,溶解率明显降低,这样提供了一个持续时间长缓慢地释放的不衰弱、不分解的肥料产品,但是随着时间同时地溶解减少。
如上指出,与尿素的结合产生额外的重大的益处。本发明最有吸引力的益处之一是氮、磷、钾、硫的比率可以有效地定制出想要的比率。例如,如表2,氮、磷、钾、硫的比率为30∶0∶0∶20。
尽管本发明是通过上述实施例进行描述的。但是本发明并不仅限于此。本发明的技术人员可以在不背离本发明精神、性质和范围的情况下,对本发明进行各种各样的修改。

Claims (28)

1、一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的硫酸铵源液;
将硫酸铵和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和硫酸铵混合形成混合剂;然后冷却该混合剂形成尿素硫酸铵颗粒。
2、如权利要求1所述的肥料,所述的粒子特别是指粒度分布为5目至10目。
3、如权利要求1所述的肥料,所述的尿素包括甲醛尿素(ureaformaldehyde)。
4、如权利要求1所述的肥料,所述的尿素包括正磷酸铵尿素(urea-ammonium)。
5、如权利要求1所述的肥料,所述的尿素包括多磷酸铵尿素(urea-ammonium polyphosphate)。
6、如权利要求1所述的肥料,所述的尿素包括尿素形式(ureaform)。
7、肥料粒子,包括:
一钾粒子包含20%空隙容积,尿素在所述的容积内。
8、如权利要求7所述的肥料,所述的粒子粒度分布为3目至10目。
9、如权利要求7所述的肥料,所述尿素包括甲醛尿素。
10、如权利要求7所述的肥料,所述的尿素包括正磷酸铵尿素。
11、如权利要求7所述的肥料,所述的尿素包括多磷酸铵尿素。
12、如权利要求7所述的肥料,所述的尿素包括尿素形式。
13、如权利要求7所述的肥料,所述的钾粒子包括氯化钾。
14、如权利要求7所述的肥料,所述的钾粒子包括硫酸钾。
15、如权利要求7所述的肥料,所述的钾粒子包括硝酸钾。
16、一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的硫酸钾源液;
将硫酸钾和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和硫酸钾混合形成混合剂;然后冷却该混合剂形成尿素硫酸钾颗粒。
17、如权利要求16所述的方法,所述步骤还包括向转鼓制粒器内引入表面活性剂。
18、如权利要求16所述的方法,所述混合剂在第二转鼓制粒器用冷空气逆流接触冷却。
19、如权利要求16所述的方法,所述转鼓制粒器的所述温度至少是所述尿素溶液的温度。
20、如权利要求16所述的方法,所述混合剂在所述硫酸钾中充分冷却至固体所述尿素。
21、如权利要求16所述的方法,所述粒子的粒度分布为4目至10目。
22、一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的氯化钾源液;
将硫酸钾和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和氯化钾混合形成混合剂;然后冷却该混合剂形成尿素氯化钾颗粒。
23、如权利要求22所述的方法,所述方法还包括向所述转鼓制粒器引入表面活性剂的步骤。
24、如权利要求22所述的方法,所述步骤还包括所述混合液在第二转鼓制粒器用冷空气逆流接触冷却。
25、如权利要求22所述的方法,所述转鼓制粒器的所述温度至少是所述尿素混合熔液的温度。
26、如权利要求22所述的方法,所述混合剂充分冷却至固体所述尿素在所述氯化钾中。
27、如权利要求22所述的方法,所述所述粒子的粒度分布为5目至10目。
28、一种肥料原料的制粒方法,包括的步骤有:
提供含尿素的混合物;
提供粒度分布为3目至大约10目的硝酸钾源液;
将硝酸钾和尿素引入一转鼓制粒器;
在转鼓制粒器中保持一定温度以充分保持混合物处于液态,以便于和硝酸钾混合形成混合剂;然后冷却该混合剂形成尿素硝酸钾颗粒。
CN99805148A 1998-04-17 1999-04-08 含尿素肥料的造粒方法 Pending CN1297426A (zh)

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US09/061,265 US6293985B1 (en) 1998-04-17 1998-04-17 Fertilizer granulation method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413812C (zh) * 2004-08-23 2008-08-27 徐耀武 复合硫基大颗粒尿素生产工艺
CN112624833A (zh) * 2020-12-29 2021-04-09 卡力(烟台)农业发展有限公司 一种硼镁肥及其制备方法

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090227452A1 (en) * 2001-09-14 2009-09-10 Birthisel Timothy D Spent fermented grain soil additive
US6884756B2 (en) * 2001-09-14 2005-04-26 The Andersons Agriservices, Inc. Water-dispersible pellets
US7694523B2 (en) 2004-07-19 2010-04-13 Earthrenew, Inc. Control system for gas turbine in material treatment unit
US7685737B2 (en) 2004-07-19 2010-03-30 Earthrenew, Inc. Process and system for drying and heat treating materials
US7024800B2 (en) * 2004-07-19 2006-04-11 Earthrenew, Inc. Process and system for drying and heat treating materials
US7024796B2 (en) 2004-07-19 2006-04-11 Earthrenew, Inc. Process and apparatus for manufacture of fertilizer products from manure and sewage
US20060101881A1 (en) * 2004-07-19 2006-05-18 Christianne Carin Process and apparatus for manufacture of fertilizer products from manure and sewage
US7610692B2 (en) 2006-01-18 2009-11-03 Earthrenew, Inc. Systems for prevention of HAP emissions and for efficient drying/dehydration processes
US8491692B2 (en) * 2006-02-08 2013-07-23 The Andersons, Inc. Dispersable potash granule
US8609145B2 (en) * 2006-02-08 2013-12-17 The Andersons, Inc. Dispersible struvite particles
CA2638704C (en) * 2008-08-13 2014-04-08 Karnalyte Resources Inc. Process for producing potassium chloride granulars
US8986581B2 (en) 2012-07-27 2015-03-24 Carbron Basis Company Ltd. Biochar products and method of manufacture thereof
KR101485578B1 (ko) * 2013-05-24 2015-01-21 주식회사 리더스케미컬 지효성을 갖는 매트릭스형 입상복합비료의 제조방법 및 이로부터 얻은 매트릭스형 입상복합비료
US10201820B2 (en) 2013-11-12 2019-02-12 Nous, Llc System for coating granular materials
US9624139B2 (en) 2013-12-03 2017-04-18 The Andersons, Inc. Water-dispersible particles formed with granules embedded in crystallized matrix
GB2522491B (en) * 2014-06-02 2016-08-31 Sirius Minerals Plc Pelletising an evaporite mineral
GB2522492B (en) 2014-06-02 2020-07-15 York Potash Ltd Dry powder processing
GB2530757B (en) 2014-09-30 2019-04-24 York Potash Ltd Pelletising process
EP3359617A4 (en) 2015-10-08 2019-08-14 The Carbon Basis Company Ltd. BIO COAL PRODUCTS AND METHOD FOR THE PRODUCTION THEREOF
CN109718714A (zh) * 2019-01-30 2019-05-07 深圳市芭田生态工程股份有限公司 一种全水溶速度快的肥料颗粒及其制备方法、制备设备

Family Cites Families (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2214145A (en) 1937-05-10 1940-09-10 Merritt J Pike Switch
US2741545A (en) * 1953-11-18 1956-04-10 Tennessee Valley Authority Apparatus for ammoniation of superphosphate
US3206528A (en) 1962-07-02 1965-09-14 Bausch & Lomb Pelletizing process and apparatus
US3348938A (en) 1963-04-18 1967-10-24 Ici Ltd Process for producing granular mixed fertilizer
US3436175A (en) 1964-06-19 1969-04-01 Duval Corp Method of producing ammonium sulfate,potassium sulfate and magnesium oxide from langbeinite
US3295950A (en) 1965-05-03 1967-01-03 Tennessee Valley Authority Method of making sulfur-coated fertilizer pellet having a controlled dissolution rate
US3449106A (en) 1965-08-09 1969-06-10 Uss Agri Chem Inc Process and apparatus for preparing granular fertilizer from organic materials
GB1168444A (en) * 1965-12-08 1969-10-22 Fisons Ltd Improved Granular Materials
US3342578A (en) 1966-01-11 1967-09-19 Exxon Research Engineering Co Bulk-blended fertilizer comprising nitrogenous matrix pellet
US3528767A (en) 1966-03-16 1970-09-15 Donald E Garrett Production of potassium chloride,potassium sulfate and sodium sulfate from brines and the like containing potassium,chloride and sulfate
GB1109410A (en) * 1966-04-01 1968-04-10 Toyo Koatsu Ind Inc Production of granular fertilizer
US3423171A (en) 1966-06-14 1969-01-21 Kali Forschungs Inst Method for making alkali metal sulfate
US3429657A (en) 1966-09-02 1969-02-25 Us Interior Method for recovering and producing potassium salts
US3408169A (en) 1967-05-31 1968-10-29 Cominco Ltd Pan granulation
US3536475A (en) 1967-11-17 1970-10-27 Battelle Memorial Institute Method of making pellets from a finely divided solid material
US3578399A (en) 1968-10-23 1971-05-11 Int Minerals & Chem Corp Production of crystalline potassium sulfate
US3635691A (en) 1969-01-01 1972-01-18 United States Steel Corp Method for producing pelletized ammonium sulfate-ammonium nitrate material
CA916665A (en) 1970-02-17 1972-12-12 Cominco Ltd. Potash granulation
US3617243A (en) 1970-03-23 1971-11-02 Great Salt Lake Minerals Process for the production of anhydrous potassium magnesium sulfate material with low hygroscopicity from hydrated potassium magnesium sulfate material
US3687639A (en) 1970-05-25 1972-08-29 Int Minerals & Chem Corp Production of finely divided potassium sulfate crystals
US3656891A (en) 1970-08-05 1972-04-18 Occidental Petroleum Corp Process for the production of potassium sulfate and borax
US3728438A (en) 1970-09-03 1973-04-17 G Nasyrov Method of producing potassium sulphate from alkali metal sulphates or their mixtures with carbonates
US3825414A (en) * 1971-11-29 1974-07-23 Tennesse Valley Authority Urea-ammonium polyphosphate production
US3785796A (en) 1972-01-27 1974-01-15 Tennessee Valley Autority Production of urea-ammonium sulfate
UST909003I4 (en) 1972-03-22 1973-04-03 Hicks ett al pan granulation of urea
US3808051A (en) 1972-06-23 1974-04-30 Church & Dwight Co Inc Cleaning method and compositions
GB1383110A (en) 1972-08-03 1975-02-05 Fisons Ltd Process for granulating urea
US3843772A (en) 1972-09-14 1974-10-22 Int Minerals & Chem Corp Production of white potassium sulfate crystals
US3983211A (en) 1972-12-08 1976-09-28 Gakif Zakirovich Nasyrov Method of producing alumina and potassium sulphate form alunite
US3853490A (en) 1973-01-22 1974-12-10 Int Minerals & Chem Corp Granulation of potassium sulfate
US4116848A (en) 1973-05-17 1978-09-26 Church & Dwight Co., Inc. Novel cleaning method and compositions
US3984521A (en) 1973-12-03 1976-10-05 Gakif Zakirovich Nasyrov Method of producing alumina and potassium sulphate from alunite
US4175943A (en) 1973-12-19 1979-11-27 Triomf Fertilizers Water-soluble fertilizers
US4131668A (en) 1974-03-15 1978-12-26 Nippon Steel Corporation Iron ore pellet process control
US3928015A (en) * 1974-10-29 1975-12-23 Tennessee Valley Authority Manufacture of urea-ammonium sulate from sulfuric acid, ammonia, and urea
US3967930A (en) 1974-11-18 1976-07-06 N L Industries, Inc. Separation of complex potassium salts from brine evaporites
US3998935A (en) 1975-01-30 1976-12-21 Pennzoil Company Manufacture of potassium sulfate
US4142885A (en) 1975-03-21 1979-03-06 Veba-Chemie Aktiengesellschaft Method of preparing fertilizers with retarded nutrient release
US4045543A (en) 1975-11-12 1977-08-30 Pennzoil Company Production of potassium sulfate and hydrogen chloride
DE2627871C2 (de) 1976-06-22 1978-08-24 Kali Und Salz Ag, 3500 Kassel Verfahren zur Gewinnung von grobem K2 SO4 in Kristallisatoren mit innerer Umwälzung und klassierendem Salzabzug
DE2643001C3 (de) 1976-09-24 1979-06-07 Kali Und Salz Ag, 3500 Kassel Verfahren zur Herstellung von Kaliumsulfat
US4385920A (en) 1976-12-02 1983-05-31 International Minerals & Chemical Corp. Granulation of potash salts
US4264543A (en) 1977-03-08 1981-04-28 Oil-Dri Corporation Of America Process for manufacturing synthetic gypsum absorbent granules
US4183738A (en) 1977-05-09 1980-01-15 International Fertilizer Development Center Granulation process and products produced thereby
DE2862174D1 (en) 1977-09-30 1983-03-17 Pechiney Aluminium Process for the treatment of solutions containing carbonate, sulfate, possibly hydroxide of sodium or potassium and at least one of the metals vanadium, uranium, molybdenum
US4215100A (en) 1978-05-18 1980-07-29 Antonova Nina V Method of producing potassium sulfate
US4323386A (en) 1978-11-03 1982-04-06 Norsk Hydro A.S. Method of manufacturing NP- or NPK-containing fertilizers from magnesium containing phosphate
US4353852A (en) 1978-11-06 1982-10-12 Procor Limited-Procor Limitee Pelletizing method and apparatus
DE2950404C2 (de) 1978-12-25 1984-05-30 Asahi Kasei Kogyo K.K., Osaka Verfahren zur Herstellung von Kaliumsulfat
US4344747A (en) 1978-12-29 1982-08-17 Owens-Corning Fiberglas Corporation Sensing apparatus for pelletizing process
US4371481A (en) 1979-02-06 1983-02-01 Phillips Petroleum Company Iron-containing refractory balls for retorting oil shale
JPS5617922A (en) 1979-07-19 1981-02-20 Chisso Corp Continuously manufacturing apparatus for potassium sulfate
US4268492A (en) 1979-08-06 1981-05-19 Pennzoil Company Process for production of potassium sulfate and hydrochloric acid
US4334906A (en) 1980-03-25 1982-06-15 Union Oil Company Of California Slow release soil amendment and micronutrient source
CA1144771A (en) 1980-12-24 1983-04-19 Stewart G. Bexton Manufacture of urea sulfur fertilizer
US4371512A (en) 1981-02-03 1983-02-01 Pennzoil Company Production of alkali metal sulfates
JPS57205315A (en) 1981-06-15 1982-12-16 Chisso Corp Reducting method for amount of chlorine contained in modified potassium sulfate by very small amount
FR2523114A1 (fr) 1982-03-11 1983-09-16 Alsace Mines Potasse Procede de fabrication de sulfate de potassium a partir de solutions contenant du chlorure de magnesium et de chlorure de potassium
JPS58161917A (ja) 1982-03-19 1983-09-26 Onoda Kagaku Kogyo Kk 硫酸カリウムの製造方法
IT1152197B (it) * 1982-05-27 1986-12-31 Montedison Spa Procedimento per la preparazione di fertilizzanti a lenta cessione di azoto
US4528039A (en) 1983-02-11 1985-07-09 Lever Brothers Company Alkaline cleaning compositions non-corrosive toward aluminum surfaces
US4562058A (en) 1983-08-02 1985-12-31 International Minerals & Chemical Corp. Process for crystallizing potassium sulfate
US4588573A (en) 1983-09-27 1986-05-13 Prodeco, Inc. Method for the production of potassium sulfate using sulfuric acid and potassium chloride
US4554151A (en) 1983-09-27 1985-11-19 Prodeco, Inc. Process for producing K3 H(SO4)2 crystals and potassium sulfate crystals
US4554004A (en) 1983-10-19 1985-11-19 J. R. Simplot Company Process for granulation of fertilizer materials
IT1174208B (it) 1984-06-19 1987-07-01 Italkali Procentimento per la produzione di solfato potassico e di solfati potassico magnesiaci granulati, e granulati cosi'prodotti
US4743287A (en) 1984-09-24 1988-05-10 Robinson Elmo C Fertilizer and method
US4589904A (en) 1984-09-25 1986-05-20 Tennessee Valley Authority Granulation of crystalline by-product ammonium sulfate
US5112379A (en) 1984-10-25 1992-05-12 Union Oil Company Of California Multicomponent soil supplement
US4707347A (en) 1985-04-17 1987-11-17 Kali Und Salz Process for the production of potassium sulfate from potassium chloride by means of ion exchangers
NL8502838A (nl) 1985-10-17 1987-05-18 Azote Sa Cie Neerlandaise Werkwijze ter vervaardiging van ureum en ammoniumsulfaat bevattende meststofkorrels.
NL8700913A (nl) 1987-04-16 1988-11-16 Nl Stikstof Werkwijze voor het vervaardigen van kunstmestgranules.
US5177008A (en) 1987-12-22 1993-01-05 Kampen Willem H Process for manufacturing ethanol and for recovering glycerol, succinic acid, lactic acid, betaine, potassium sulfate, and free flowing distiller's dry grain and solubles or a solid fertilizer therefrom
WO1989005861A1 (en) 1987-12-22 1989-06-29 Willem Hemmo Kampen Process and apparatus for manufacturing ethanol, glycerol, succinic acid and free flowing distiller's dry grain and solubles
US5264017A (en) 1988-01-06 1993-11-23 Martin Marietta Magnesia Specialties Inc. Inorganic reactive granulating binder and conditioner
US5152821A (en) 1988-02-01 1992-10-06 Hi-Fert Pty. Ltd. Addition of supplemental macro & micro nutrients to granular phosphatic fertilizers
US4842790A (en) 1988-02-22 1989-06-27 Tennessee Valley Authority Method and apparatus for producing high-strength grannular particulates from low-strength prills
US5043007A (en) 1988-08-25 1991-08-27 Davis Bobby G Process for the production of fertilizer and the fertilizer produced thereby
US5599373A (en) 1988-09-30 1997-02-04 F.P.S.- Finances Products Services, S.R.L. Sulfur-based chemical soil-corrective in the form of pellets for agricultural use
USH1070H (en) 1989-12-26 1992-07-07 Tennessee Valley Authority Granulation of potash materials
US5108481A (en) 1991-02-13 1992-04-28 Vista Ferrous Sulfate, Ltd. Pelletized ferrous sulfate monohydrate product and method for making the same
US5124104A (en) 1991-05-15 1992-06-23 Holley Carl A Coal pond fines agglomeration
IT1252664B (it) 1991-12-23 1995-06-21 Enichem Agricoltura Spa Processo per la granulazione di un fertilizzante denominato nitrato ammonico
US5460765A (en) 1992-04-30 1995-10-24 Derdall; Gary Process for pan granulating a particulate material
US5298050A (en) 1992-10-09 1994-03-29 Great Salt Lake Minerals Corporation High water solubility potassium sulfate and method of producing same
US5366534A (en) 1992-11-30 1994-11-22 Sherritt Inc. Granular potassium sulfate preparation and process for production thereof
US5322532A (en) 1993-06-10 1994-06-21 Church & Dwight Co., Inc. Large size sodium bicarbonate blast media
US5330552A (en) 1993-07-08 1994-07-19 Rizzo John M Method for increasing crop yield
US5383951A (en) 1993-08-27 1995-01-24 Cominco Ltd. Production of granular ammonium sulphate using stripped zinc electrolyte as a granulating aid
US5352265A (en) 1993-11-12 1994-10-04 Freeport-Mcmoran Resource Partners, Limited Partnership Granular urea-based fertilizer
US5552126A (en) 1994-11-28 1996-09-03 Dead Sea Works Ltd. Co-production of potassium sulfate, sodium sulfate and sodium chloride
US5549876A (en) 1994-11-28 1996-08-27 Dead Sea Works Production of potassium sulfate using differential contacting
US5529764A (en) 1994-11-28 1996-06-25 Dead Sea Works Ltd. Co-production of potassium sulfate and sodium sulfate
US5567221A (en) * 1995-01-03 1996-10-22 Oms Investments, Inc. Compositions and methods for use in aquaculture
US5571303B1 (en) 1995-03-06 2000-10-17 Cominco Ltd Sulfur-based fertilizer and process for production thereof
US5624649A (en) 1995-04-26 1997-04-29 General Electric Co. Process for reduction of sulfur dioxide emission from combustion gases combined with production of potassium sulfate
CA2151569C (en) 1995-06-12 1999-05-11 Gary Derdall Process for pan granulation
PT835161E (pt) 1996-04-19 2003-03-31 Airborne Ind Minerals Inc Processo de granulacao
US5725630A (en) 1996-07-31 1998-03-10 Helena Chemical Co. Dry granular fertilizer blend and a method of fertilizing plants
JP3096666B2 (ja) 1996-11-01 2000-10-10 藤崎電機株式会社 粉体を造粒する方法及びその装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100413812C (zh) * 2004-08-23 2008-08-27 徐耀武 复合硫基大颗粒尿素生产工艺
CN112624833A (zh) * 2020-12-29 2021-04-09 卡力(烟台)农业发展有限公司 一种硼镁肥及其制备方法

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