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US 12,281,037 B2Granted
Fiber and manufacturing method of the same
AssigneeNippon Fiber Corporation
InventorHiroshi Fukazawa
Life of this patent
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Abstract
A fiber and a fiber manufacturing method are provided, in which an integrated coal gasification combined cycle (IGCC) slag constitute a component of raw materials of the fiber. The fiber can be fabricated stably from the melt of the raw materials by the method in which the raw materials are preheated up to 1300° C. or higher; the raw materials are maintained at the same temperature for certain period of time; subsequently, the temperature of the raw materials are raised further to cause the melted materials are spun into fiber.
Claims5
A fiber manufacturing method, comprising the steps of:
- I) heating a raw material at a temperature between 1300° C. and 1325° C.;
- II) maintaining the temperature of the raw material at the step (I) for a period between 50 and 120 minutes;
- and
- III) causing the raw material after the step (II) to flow out through a forming hole to form a fiber while increasing the temperature of the raw material up to 1400° C., wherein the raw material comprises:
- a) 50 to 100% by mass of waste from an integrated coal gasification combined cycle (IGCC);
- and
- b) 0 to 50% by mass of copper slag, wherein as to the raw material,
- i) the total content of SiO2 and Al2O3 is 40% by mass or more and 70% by mass or less,
- ii) a mass ratio of Al2O3/(SiO2+Al2O3) is within a range of 0.15 to 0.40, and
- iii) content of CaO is between 10 and 30% by mass.
7 more elements
Dependencies are inferred from the claim text.