[특허]Method for producing hot-mix asphalt

Nasser, Claudio Macedo

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특허 상세정보

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Method for producing hot-mix asphalt

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E01C-019/10
미국특허분류(USC)	366/007; 366/024
출원번호	US-0139246 (2009-08-02)
등록번호	US-8985835 (2015-03-24)
우선권정보	BR-0805496 (2008-12-19)
국제출원번호	PCT/BR2009/000307 (2009-08-02)
§371/§102 date	20110629 (20110629)
국제공개번호	WO2010/069016 (2010-06-24)
발명자 / 주소	Nasser, Claudio Macedo Nasser, Patricia Vasconcelos Correa
출원인 / 주소	Nasser, Claudio Macedo
대리인 / 주소	Alston & Bird LLP
인용정보	피인용 횟수 : 1 인용 특허 : 2

초록
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There is described a hot-mix asphalt plant intended for the production of hot-mix asphalt using a full percentage of milled asphalt product or using cold ingredients and filler charge for producing first grade hot-mix asphalt, comprised of a circular chamber 2 adapted to receive and mix milled asphalt product with solid asphalt additive or to receive and mix the cold ingredients and a filler charge with liquid asphalt cement, provided with a circular tubular coil 104 for circulation of thermal fluid or gas, secured next to the lower side part of the circ...

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1. A method of producing hot-mix asphalt using a full percentage of milled asphalt product and heating, drying and mixing using combined solar thermal energy (CSTE), wherein said method comprises the steps of: (a) providing a plant designed and built to produce hot-mix asphalt using a full percentage of milled asphalt product and heating, drying and mixing a material using combined solar thermal energy (CSTE), the said asphalt plant comprising: (1) a circular chamber adapted to receive the milled product and mix the same with solid asphalt additive or cold ingredients with a “filler” charge, at the speeds of 3.3 rpm, 6.6 rpm and 9.9 rpm;(2) a tubular coil adapted to the circular chamber with electrical resistors or gas-fueled heaters that is connected to a combined solar thermal energy module panel for producing thermal energy in the form of heat and heating and drying the milled asphalt product or the cold ingredients and the “filler” charge;(3) a combined solar thermal energy module panel adapted with a rectangular tubular coil with heating by sun radiation combined with electrical resistors or gas-fueled heaters to be automatically activated whenever there is no sunlight available; and,(4) a heat exchanger adapted with two pipe coils with thermal fluid or gas to preheat the cold ingredients and lower the temperature of the gasses being emitted into the atmosphere;(b) carrying the cold ingredients to the circular chamber;(c) carrying the “filler” charge to the circular chamber;(d) carrying the solid asphalt additive to the circular chamber;(e) heating and drying the cold ingredients and the “filler” charge in the circular chamber;(f) carrying the milled asphalt product to the circular chamber;(g) mixing the milled asphalt product with solid asphalt additive to produce recycled hot-mix asphalt in a quantity of up to 750 (seven hundred and fifty) tons per hour; and,(h) mixing the cold ingredients, the “filler” charge, and liquid asphalt cement to produce hot-mix asphalt in a quantity of up to 750 tons per hour. 2. A method as claimed in claim 1, wherein the method further comprises the steps of: (i) stopping the operation of an asphalt pump if there occurs any ingress into the chamber, of cold ingredients together with milled product, wherein the asphalt pump is calibrated to produce first grade hot-mix asphalt or hot-mix asphalt using a full percentage of milled product;(j) receiving the liquid asphalt cement having been weighed rather than measured in terms of mass flow; and(k) awaiting for the necessary time in the circular chamber that the milled asphalt product be fully recycled without any presence of chunks, homogeneous and with no temperature variations. 3. A method as claimed in claim 1, wherein: the combined solar thermal energy module panel serves to enhance the heating capacity of the asphalt plant,the coils of the circular chamber and the combined solar thermal energy module panel are configured such that therein occurs a circulation of thermal fluid or gas for purposes of transfer of thermal energy in the form of heat for heating, drying and mixing the material using a full percentage of granular milled product, in chunks or pieces with sizes of up to 100 mm and solid asphalt additive for producing fully (100%) recycled hot-mix asphalt or for heating, drying and mixing cold ingredients with sizes of up to 75 mm, “filler” charge and liquid asphalt cement for producing first grade hot-mix asphalt, such method further comprising the steps of:(l) carrying the cold ingredients from a cold feed silo/tank, using grading sieves and preheating the cold ingredients, into the circular chamber for heating, drying and mixing;(m) carrying the milled asphalt product from the milled asphalt product silo/tank into the chamber for heating, drying and mixing;(n) mixing the solid asphalt additive with milled asphalt product in sizes of up to 100 mm for producing a fully recycled hot-mix asphalt in a quantity of up to 750 (seven hundred and fifty) tons per hour;(o) mixing the cold ingredients upon the heating thereof with “filler” charge or fibers and with the liquid asphalt cement for producing hot-mix asphalt in a quantity of up to 750 (seven hundred and fifty) tons per hour; and,(p) carrying the recycled hot-mix asphalt or first grade hot-mix asphalt into a hot-mix asphalt storage tanks. 4. A method as claimed in claim 1, wherein the recycled hot-mix asphalt produced by the process has a final temperature that is identical to the temperature of the heated and dried milled asphalt product and in that the final temperature of the hot-mix asphalt is higher than the temperature of the heated and dried cold mix. 5. A method as claimed in claim 1, wherein the milled asphalt product, in sizes of up to 100 mm is heated and dried without being mixed with the overheated cold ingredients. 6. A method as claimed in claim 1, wherein the combination of milled asphalt product in sizes of up to 100 mm and the solid asphalt additive constitutes the full percentage (100%) of the material used to produce the recycled hot-mix asphalt. 7. A method as claimed in claim 1, wherein the plant for producing hot-mix asphalt using a full percentage of milled asphalt product or for producing an asphalt mixture with cold mix using combined solar thermal energy further comprises the cooling of the vapor and gas produced in the circular chamber for heating, drying and mixing, where in order to be able to operate, the system used for cooling the temperature of the vapor and gas produced by the circular chamber for heating, drying and mixing materials in order to produce hot-mix asphalt comprises a first circular tubular coil filled with thermal fluid or gas, provided above the half-shafts used for heating, drying and mixing operations, which transfers heat from the mixture to this first coil that heats the side walls of a cold ingredients storage tank, provided with a grading sieve, to provide a degree of preheating and return of the material to the circular chamber using a centrifugal pump to return the same to the first coil provided near the outlet of the filter elements which purpose consists in withdrawing heat from the vapor and gas being let out into the atmosphere and transfer such heat for preheating the cold ingredients, wherein the method further comprises the steps of: (q) carrying the fluid heated at the source through tubular coils into the cold material receiving silo/tank for cold feed;(r) reducing the temperature of the vapor and gas vented to the atmosphere; and,(s) preheating the cold ingredients to produce hot-mix asphalt. 8. A method as claimed in claim 6, characterized by further comprising the step of: (t) providing a fan for blowing the cooled vapor and gas from the circular chamber.

이 특허에 인용된 특허 (2)

이 특허를 인용한 특허 피인용횟수: 1

Greene, Lonnie D. Liquid asphalt heating and mixing system. USP2017089719214.

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Method for producing hot-mix asphalt

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