Jfe Steel Corporation

Yutaka Yamauchi

Katsutoshi Igawa

Shizuki Kasaoka

Seiji Sakamoto

Toshiro Sawada

Koichi Shinohara

Yuji Tsukihara

Shinjiro Baba

Koji Hanaoka

Ryoichi Nagata

Takuya Tsubota

Yasuyuki Yamaguchi

Related to a blast furnace coke and a production method thereof. A coke having high reactivity and high strength in which coke strength, reactivity with COand a pore size distribution are each at a desired level can be produced at a low cost by using a coal blend composed of a small number of brands comprising a large quantity of caking coal having medium rank and low fluidity. The blast furnace coke, being obtained by charging a coal blend comprising 60 wt % or more of semi-heavy caking coal having medium rank and low fluidity in which a content of inert component is 30 vol % or more in total or another coal blend comprising 60 wt % to 95 wt % of semi-heavy caking coal having medium rank and low fluidity in which mean reflectance (Ro) is 0.9 to 1.1 and maximum fluidity (MF) is less than 3.0 and the balance being a caking coal in which mean reflectance (Ro) exceeds 1.1 into a coke oven and coking the coal blend, which has a pore size distribution where a content ratio of pores having a diameter of less than 10 &#x3bc;m is from 12 vol % to 15 vol % and a content ratio of pores having a diameter of from 10 &#x3bc;m to 100 &#x3bc;m is from 10 vol % to 15 vol % and the production method thereof.

High reactivity and high strength coke for blast furnace and method for producing the same

In a method of producing coke for metallurgy by carbonizing a coal blend obtained by blending plural raw coals in an coke oven, a coal blend containing not less than 60 wt % of a medium coking coal of middle coalification degree and low fluidity having an inert component content of not less than 30% is used as a coal charged into the coke oven, whereby a great amount of raw coal of a brand being cheap and easily available can be blended in a great amount and hence coke for metallurgy having an excellent quality such as strength or the like can be produced by blending few brands of coals as compared with a coal blend of many brands.

Method for producing metallurgical coke

The soil modifier includes a porous material obtained by dry distillation of refuse-derived fuel to pioneer a cheap way for effectively utilizing the refuse, thereby enabling the environment to be improved by modification of soil while promoting environment preserving disposal of the refuse. The porous material includes carbon, nitrogen, sulfur, phosphorus, potassium, and zinc.

Soil modifier

Growing community of inventors

Okayama, Japan

Yutaka Yamauchi