METHOD FOR DECIDING BLENDING AMOUNT OF ASH-FREE COAL, AND METHOD FOR PRODUCING COKE FOR BLAST FURNACE

• Main Authors: HAMAGUCHI MAKI, ISHIDA KAZUHIDE, NISHIHATA HIROKO, WADA SHOHEI, SHISHIDO TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 12.05.2016
• Subjects: CHEMISTRY; DESTRUCTIVE DISTILLATION OF CARBONAGEOUS MATERIALS FORPRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS; FUELS; LUBRICANTS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE

PROBLEM TO BE SOLVED: To provide: an efficient method for deciding a blending amount of ash-free coal when producing a coke for blast furnaces; and a method for producing a coke for blast furnaces using the decision method.SOLUTION: This invention relates to a method for deciding a blending amount of ash-free coal obtained by solvent extraction of coal, when producing a coke for blast furnaces which comprises feed coal and the ash-free coal. The method comprises: deciding the blending amount of the ash-free coal with respect to the blend coal on the basis of the reference value W [mass%], wherein the reference value W is calculated by using the porosity index Pv [vol%] of the feed coal, the expansibility index D [vol%] of the ash-free coal, and the true specific gravity ρ of the ash-free coal through the following equation (1): W=(Pv/D)×ρ×100. The blending amount of the ash-free coal with respect to the blend coal is preferably 0.29 W to 1.00 W [mass%].SELECTED DRAWING: None 【課題】高炉用コークスの製造の際の効率的な無灰炭配合量決定方法とこの決定方法を用いた高炉用コークスの製造方法との提供を目的とする。【解決手段】本発明は、石炭の溶剤抽出処理により得られる無灰炭と原料石炭とを含む高炉用コークスの製造の際の無灰炭配合量決定方法であって、上記原料石炭の空隙率指数Ｐｖ［体積％］、上記無灰炭の膨張性指数Ｄ［体積％］及び上記無灰炭の真比重ρを用いて下記式（１）で算出される基準値Ｗ［質量％］により、上記配合炭に対する上記無灰炭の配合量を決定する。上記配合炭に対する上記無灰炭の配合量としては、０．２９Ｗ［質量％］以上１．００Ｗ［質量％］以下が好ましい。Ｗ＝（Ｐｖ／Ｄ）×ρ×１００ ・・・（１）【選択図】なし