• 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:

    公开号:SE537047C2
    申请号:SE1150972
    申请日:2010-04-20
    公开日:2014-12-16
    发明作者:Rodrigo Ribeiro De Araújo；Celso De Jesus Silva；Antonino Alves E Silva Reis；Leonídio Stegmiller；Aldo Gamberini Júnior；Reinaldo Walmir De Jesus；Alexandre Soares Pinto
    申请人:Vale Sa；
    IPC主号:
    专利说明:

    537 047 These particles, in powder form, eventually blow away with the wind to the edges of the port facility.
    As a consequence, the villages surrounding the factories and ending up in the cities where mining and iron ore sintering play a vital economic role are most affected by the heavy emission of particles into the atmosphere because, in addition to being harmful to health, they are a general nuisance in daily life. contamination of roofs, walls, sidewalks and other environments, causing eye irritation.
    In addition, the company that generates this type of pollution, by not meeting the requirements of environmental standards, is subject to fines and processes from government agencies, as well as the fact that their image is damaged in the eyes of society in general.
    The use of water as a universal inhibitor of particulate emissions is known in the art, however, it is not very effective because the water evaporates while the pellet is still very hot and raises the final moisture content of the pellet if they are cold. In addition to using water as a dust suppressant, there are other products on the market for this purpose, the most common of which are polymers or a paraffin base.
    OBJECTS OF THE INVENTION The object of the present invention is to promote the use of an effective particulate emission inhibitor for application to pellets, granules, sludge, and other products made from iron ore and other minerals, which will drastically reduce the particulate emission, with a lasting effect, although these products are moved, stacked, loaded and unloaded.
    Another object of the invention is to provide a method for inhibiting particle emission caused by the friction of iron ore pellets by spraying an alcohol by-product.
    Brief description of the invention The invention consists of a method for inhibiting particle emission 537 047 in friction of heat-treated iron ore pellets comprising the following steps: a) removal of heat-treated iron ore pellets at a temperature around 200 ° C, b) spraying with an alcohol by-product on heat-treated pellets.
    The present invention also encompasses the use of an alcohol by-product to inhibit particle emission, wherein said by-product is sprayed on iron ore pellets, which are either heated or not.
    Brief Description of the Figures The present invention will hereinafter be described in more detail based on an exemplary embodiment shown in the drawings. The figures show: Figure 1 - shows a flow chart of the method for inhibiting particle emission, and Figure 2 - shows a graph showing the thermo-weight analysis of the glycerin used in the test.
    DETAILED DESCRIPTION OF FIGURES 1 In a preferred embodiment, which can be seen in Figure 1, the present invention is a method of inhibiting particle emission upon friction of heat-treated iron ore pellets. The process is based on the use of a high boiling point particulate emission inhibitor which does not evaporate on contact with hot bodies, such as pellets produced in the firing process in a ball mill.
    This method of inhibiting particle emission while subjecting melt furnace heat treated iron ore pellet to friction comprises the following steps: a) removing the heat treated iron ore pellet at a temperature of about 200 ° C, and b) spraying with an alcohol by-product on the pellet.
    Initially, unprocessed iron ore pellets are placed in the furnace to be heat-treated or burned. The maximum burning temperature is around 1,350 ° C, which is then cooled after leaving the oven to a temperature of 200 to 250 ° C.
    Heat-treated iron ore pellets are then moved from the furnace to undergo the step of spraying with the alcohol by-product. In this step, a ratio of 500 g of alcohol by-product per tonne of pellets burned must be taken into account, a value which can be optimized depending on the amount of sludge aggregated on the surface of the pellet. The preferred alcohol by-product is glycerin from biofuels, for example. Other compounds may be used provided they have the same physicochemical properties.
    After the still hot pellet has been sprayed with glycerin, they are ready to be handled or transported without the emission of iron ore particles. It is at this last step that a particulate emission control is performed.
    This method, the object of the present invention, is preferably used on pellets coming from iron or ball sintering processes, however, it can be used in combination with other unit operations in other mining processes where there is emission of particles.
    The main function of this process is to prevent the emission of iron ore particles obtained from the friction between heat-treated or fired pellets. This friction occurs mainly when the pellet is handled, stacked, loaded, and unloaded.
    Furthermore, the present invention is directed to the use of an alcohol by-product to inhibit particulate emissions.
    This alcohol by-product must be sprayed on the heat-treated iron ore pellet resulting from the iron ore ball sintering processes.
    The preferred alcohol by-product is glycerin (glycerol + propanetriol), obtained from biofuel. However, other chemical compounds may be used provided they have the same physicochemical properties and effects on the product.
    Particulate emission-inhibiting effect on the product (heat-treated iron ore pellet): - The inhibitor must have the property of being able to spread, either naturally or by capillary effect after being applied to burnt pellets, between the parts of the pulp, such as pellets stored in storage sites, thereby automatically and significantly improve the degree of coverage of the mass as a whole. The inhibitor must have sufficient water uptake as a mechanism to maintain a minimal level of moisture in the pellet mass, to help retain dust or particles on its surface. In the case of the iron ore pellet production process, the inhibitor must prevent the degeneration of the physical and metallurgical properties of the pellet leading to its degradation due to excess water being sprayed on the material to be handled and / or transported. In the case of iron ore pellets, the inhibitor must preserve the physical properties of the pellet and significantly reduce the use of water in such a way as to allow greater marginal gains in process productivity, resulting in an extra volume of pellets and a reduction in transport cost. . The inhibitor must partially or completely replace the water during the process involving the handling, stacking, loading and unloading of pellets, granules, sludge and other products obtained from iron ore and other minerals, in order to dramatically reduce the emission of particles (dust) in the operating area .
    - The particulate emission inhibitor must meet the requirements set by environmental bodies. In the case of the present invention, the use of glycerin as a particulate emission inhibitor meets all the specifications and functions listed above.
    Laboratory tumbling tests to verify the effectiveness of the application of glycerin to heat-treated iron ore pellets: Laboratory tumbling tests were carried out to verify the effectiveness of the application of glycerin to pellets at 200 ° C in order to inhibit the emission of particles generated by the action of friction, or 53 movement, stacking, finishing, loading, and unloading.
    The test consisted of spraying glycerin on 10 kilos of heated pellets that were collected when they came out of the oven. Immediately after spraying, the pellet was tumbled using the abrasive drum (SO3271 - 1995) for one minute. After tumbling, the drum door was opened immediately and the emission of particles in suspension inside the drum was measured with specific measuring equipment, the result being expressed in mg / ms. The sequence sequence of the procedure was standardized to minimize possible loss of time and, as a consequence, loss of pellet heat during the test.
    Laboratory test results showed a reduction in particle emission on the order of 500 mg / ms to 100 mg / ms after the application of glycerin.
    These results were obtained with the preferred dosage of 500 grams of glycerin per ton of heat treated or burned pellets. However, other dosages may be used to obtain a satisfactory reduction in particulate emissions.
    Thus, it was confirmed that glycerin is an inhibitor of particulate emissions when applied to iron ore pellets. The results also showed that glycerin can be used on an industrial scale to inhibit particulate emissions when pellets are handled during stacking, loading, and unloading.
    Producing this glycerin is also advantageous, given that for every 10 liters of biofuel produced, one liter of glycerin is produced in the unit operation.
    While emphasizing the benefits of using glycerin as a particle emission inhibitor in friction between still hot iron ore pellets, the graph in Figure 2 illustrates the thermowweight analysis test of the glycerin used in the aforementioned test, showing its strength when exposed to high temperatures, thereby making it suitable for the desired application on still hot pellets (boiling at 290 ° C).
    It is important to emphasize that glycerin can also be used on other materials with properties similar to those of particulate iron ore and pellets.
    Description of a preferred embodiment has been made, but 537 047 it is understood that the scope of the present invention covers other possible variants, which are limited only by the content of the appended claims, including possible equivalents.
    权利要求:
    Claims (6)
    [1]
    A method for inhibiting particle emission caused by the friction of heat-treated iron ore pellets comprising the steps of: a) removing heat-treated iron ore pellets at a temperature of 200 ° C, and b) spraying glycerin on pellets.
    [2]
    According to claim 1, the process is characterized by spraying with glycerin in a ratio of 500 g per ton of heat-treated pellet.
    [3]
    According to claim 1, the process is characterized by the fact that the glycerin is obtained from biodiesel.
    [4]
    According to claim 1, the process is characterized by the fact that the friction between fired iron ore pellets occurs during handling, stacking, loading and unloading of iron ore pellets.
    [5]
    Use of glycerin to inhibit particulate emissions characterized by the fact that it is sprayed on heat-treated iron ore pellets.
    [6]
    Use of glycerin for inhibiting particulate emissions, according to claim 5, characterized in that the glycerin is obtained from biodiesel.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2833642A|1954-11-10|1958-05-06|Gen Mills Inc|Binder additive for making ore pellets|
    US3107166A|1960-04-04|1963-10-15|Joseph Behr & Sons Inc|Pressed metal scrap briquettes and coating process|
    SU624945A1|1972-04-03|1978-09-25|Научно-Исследовательский Институт По Проблемам Курской Магнитной Аномалии Имени Л.Д.Шевякова|Pellet production method|
    SU810839A1|1979-03-26|1981-03-07|Московский Ордена Трудового Красногознамени Институт Стали И Сплавов|Charge for producing agglomerate and pellets|
    JPH0160537B2|1985-03-11|1989-12-22|Shinnippon Seitetsu Kk|
    SU1677074A1|1989-07-03|1991-09-15|Белгородский филиал Научно-исследовательского и проектного института по обогащению и агломерации руд черных металлов "Механобрчермет"|Method of producing pellets|
    BR0301250A|2003-05-05|2004-12-21|Samarco Mineracao Sa|Iron ore pellets with reduced abrasion, bonding, degradation and dust emission, and their manufacturing process|
    US20090127499A1|2004-05-14|2009-05-21|Tran Bo L|Methods and compositions for dust control and freeze conditioning|
    US7398935B2|2004-05-14|2008-07-15|Nalco Company|Methods and compositions for dust control and freeze control|
    GB0416700D0|2004-07-27|2004-09-01|Ciba Spec Chem Water Treat Ltd|Dust suppresson and reduction of surface oxidation for mineral agglomerates|
    CN101358115B|2008-09-27|2010-06-09|沈阳铁路局科学技术研究所|Cementing agglomerant for loading bulk granule cargo of railway|
    MX2012011849A|2010-04-16|2013-07-17|Vale Sa|Process for application of alcoholic derivative on heat treated pellets for inhibition of particulate emission and system for application of alcoholic derivative on heat treated pellets for inhibition of particulate emission.|MX2012011849A|2010-04-16|2013-07-17|Vale Sa|Process for application of alcoholic derivative on heat treated pellets for inhibition of particulate emission and system for application of alcoholic derivative on heat treated pellets for inhibition of particulate emission.|
    KR101634513B1|2013-03-29|2016-06-28|제이에프이 스틸 가부시키가이샤|High-calorie gas manufacturing process|
    法律状态:
    2019-12-03| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    BRPI0903986-4A|BRPI0903986B1|2009-04-20|2009-04-20|PROCEDURE FOR INHIBITING PARTICULATE DUTIES DURING THE TERMINATION OF IRON ORE PELLETS THREADED|
    PCT/BR2010/000135|WO2010121338A1|2009-04-20|2010-04-20|Process for inhibiting particulate emission during friction of heat-treated iron ore pellets and use of an alcohol by-product to inhibit particulate emission|
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