神木兰炭制备大块铸造型焦的工业试验

INDUSTRIAL TEST OF CASTING FORMED COKE MADE FROM SHENMU BLUE-COKE

以兰炭粉为主要原料,配加黏结性烟煤和黏结剂,通过冲压方式制成大块型煤,再利用改进的隧道窑将型煤炭化成型焦,型焦应用于冲天炉,作为冲天炉化铁的主要燃料.结果表明,以兰炭粉为主要原料所制得的型煤落下强度均为97.0%;型煤经隧道窑炭化所得型焦的整块率均为99.5%,落下强度为91.0%和93.5%,固定碳含量为86.5%和88.2%,热值为27.77kJ/g和27.81kJ/g;经炭化后的型焦应用于冲天炉,冲天炉风压降低,炉内透气性得到明显改善,熔化的铁水温度达到1 421℃和1 418℃,化铁效果好,完全满足铸造的要求.

Powdered blue-coke as the main raw material, chunks of coal briquette were made by stamping methods with addition ot adhemon bituminous coal ana mnuer, and then made into formed coke in the tunnel kiln carbonizing. The formed coke was used as the main raw mate- rial in cupola smelting iron. Experimental results show that： the Shenmu powdered blue-coke as the main raw material obtained good dropping strength, 97.0 % and 97.0 % the formed coke via a tunnel kiln carbonizing had dropping strength （91. 0% and 93. 5%）, fixed carbon content （86.5% and 88.2%）, calorific value （22.77 kJ/g and 27.81 kJ/g） and when it was used in cu- pola, the pressure reduced, breathability significantly improved, melting temperature of hot met- al reached 1 421℃ and 1 418℃, good effect of smelting iron was obtained, which met the cast- ing requirements fully.