Method of recycling batches of mixed color cullet into amber, green, or flint glass with selected properties
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G00F-019/00
C03C-004/00
C03C-006/00
출원번호
US-0682450
(2003-10-09)
발명자
/ 주소
Lehman, Richard L.
출원인 / 주소
Culchrome LLC
대리인 / 주소
Woodcock Washburn LLP
인용정보
피인용 횟수 :
4인용 특허 :
8
초록▼
An automated method for recycling mixed colored cullet glass (i.e., broken pieces of glass of mixed colors and types) into new glass products. A computer controlled process identifies the virgin glass raw materials, the desired target glass properties, the composition of a batch of mixed colored cul
An automated method for recycling mixed colored cullet glass (i.e., broken pieces of glass of mixed colors and types) into new glass products. A computer controlled process identifies the virgin glass raw materials, the desired target glass properties, the composition of a batch of mixed colored cullet, and the quantity of cullet to be used in the glass melt, and the computer controlled process automatically determines the proper amounts of raw materials to add to the batch of mixed colored cullet so that recycled glass is produced having the desired coloring oxides, redox agents, and glass structural oxides in the proper proportion. The recycled glass is then used to make glass products such as beer bottles.
대표청구항▼
1. A method of creating recycled glass products of a particular color from raw materials including mixed color glass cullet, said mixed color glass cullet including at least two of green glass, amber glass, and flint glass, comprising the steps of:specifying the oxide composition percentage of said
1. A method of creating recycled glass products of a particular color from raw materials including mixed color glass cullet, said mixed color glass cullet including at least two of green glass, amber glass, and flint glass, comprising the steps of:specifying the oxide composition percentage of said at least two of said green, amber, and flint glass in said mixed color glass cullet;specifying the particular color and transmission properties of the recycled glass products;specifying a quantity of said mixed color glass cullet to be melted as a fraction of total glass in a batch from which said recycled glass products are to be created;specifying a percentage composition of each of said at least two of said amber, green, and flint glass in said mixed color glass cullet;calculating using said percentage composition the desired glass coloring oxide agent levels of glass of said particular color with said specified transmission properties;calculating a batch composition of said recycled finished glass, said batch composition including said mixed color glass cullet and amounts of said glass coloring oxide agents suitable to adjust final glass coloring oxide agent levels to said desired glass coloring oxide agent levels for glass of said particular color with said specified transmission properties; andcreating recycled glass products from said calculated batch composition. 2. A method as in claim 1, wherein said step of specifying percentage composition of said mixed color glass cullet comprises the step of measuring the composition of a sample of said mixed color glass cullet. 3. A method as in claim 1, wherein said particular color is amber, and said step of specifying transmission properties of said recycled glass products comprises the steps of specifying a thickness of a finished glass product made from said calculated composition and specifying at least two of: an optical transmission of said finished glass product at 550 nm (T 550 ), an optical transmission of said finished glass product at 650 nm (T 650 ), and a redness ratio (T 650 /T 550 ) of said finished glass product. 4. A method as in claim 3, wherein said step of calculating desired glass coloring oxide agent levels further comprises the step of calculating key glass indicator parameters selected from a group comprising iron concentration, sulfur concentration, chrome concentration, copper concentration, and oxidation state. 5. A method as in claim 1, wherein said particular color is green, and said step of specifying transmission properties of said recycled glass products comprises the steps of specifying a thickness of a finished glass product made from said calculated composition and specifying levels of chromium and iron of said finished glass product. 6. A method as in claim 5, wherein said step of calculating desired glass coloring oxide agent levels further comprises the step of calculating key glass indicator parameters selected from a group comprising chromium concentration and iron concentration. 7. A method as in claim 1, wherein said particular color is flint, and said step of specifying transmission properties of said recycled glass products comprises the step of determining the best possible neutral density transmission for a finished glass product for the specified amount of mixed color glass cullet in said finished glass product. 8. A method as in claim 7, wherein said step of calculating desired glass coloring oxide agent levels further comprises the step of calculating key glass indicator parameters selected from a group comprising chromium concentration, iron oxide concentration, selenium concentration, cobalt concentration, and oxidation state. 9. A method as in claim 1, wherein said particular color is flint, and said step of specifying transmission properties of said recycled glass products comprises the step of maximizing the amount of mixed color glass cullet used in said finished glass product for the transmission properties specified in sa id transmission properties specifying step. 10. A method as in claim 9, wherein said step of calculating desired glass coloring oxide agent levels further comprises the step of calculating key glass indicator parameters selected from a group comprising chromium concentration, iron oxide concentration, selenium concentration, cobalt concentration, and oxidation state. 11. A method as in claim 1, wherein said step of calculating the composition of said recycled finished glass comprises the step of calculating the the proper amounts of the raw materials so that the proper coloring oxides, redox agents, and glass structural oxides are present in the proper proportion in the finished glass products in accordance with the following linear equation: M m×n X n =B m where:M is a matrix of dimension m by n, where n is a number of said raw materials from which said recycled finished glass is to be made and m is a number of composition constraints including said key glass indicator parameters plus essential oxide concentrations for said finished glass products;X is a row vector of dimension n that defines the weight percent of each component in said recycled finished glass; andB is a column vector of dimension m that contains target values of said composition constraints. 12. A method as in claim 11, wherein said particular color is amber, said components include compositions of clear, amber, and green cullets plus a predetermined number of conventional glass raw materials, and said composition constraints include concentrations of SiO 2 , Al 2 O 3 , CaO, and Na 2 O from the conventional glass raw materials, the concentrations of the coloring oxides of chrome, iron, sulfur, and copper, and a chemical oxygen demand value. 13. A method as in claim 11, wherein said step of calculating the composition of said recycled finished glass comprises the additional step of selecting solutions of said linear equation which minimize costs of said components in said recycled finished glass. 14. A method as in claim 11, wherein said step of calculating the composition of said recycled finished glass comprises the additional step of selecting solutions of said linear equation which minimize iron levels in said recycled finished glass. 15. A method as in claim 1, comprising the additional step of printing said composition by weight percentages of said recycled finished glass for a predetermined amount of said finished glass products and a chemical composition of said recycled finished glass. 16. A method as in claim 15, comprising the additional step of printing estimated transmission properties of said finished glass products. 17. A glass bottle including recycled mixed color cullet wherein said bottle is made in accordance with the process of claim 1.
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이 특허에 인용된 특허 (8)
Pieper Helmut (Lohr/Main DEX), Discontinuous glass melting furnace.
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