Showing papers on "Carbochemistry published in 1968"

X-Ray Studies of Coals and Carbonaceous Materials

Abstract: From Abstract: "This report gives the result of investigations of coals of different rank, coal components, chemically and thermally treated and sedimented organic matter."

Drying and preheating coals before coking. Part 1

Abstract: A coal preheater capable of drying and preheating sufficient coal for one complete coal charge to the pilot coke oven has been designed and built in the Illinois State Geological Survey laboratories. Coking tests on high-volatile A, B, and C bituminous coals preheated to a maximum of about 450° F have indicated that preheating consistently reduces coking time and increases the potential coke making capacity of a coke oven. The strength of coke made from the individual high-volatile coals tested is consistently improved by preheating. Similar tests being made on coal blends such as those used commercially to produce metallurgical coke will be described in a subsequent publication. INTRODUCTION The demand for metallurgical coke, coupled with high operating and replacement costs of coke ovens, has been responsible for a continuing interest in development of methods to increase the daily throughput of coal in ovens producing coke for blast furnace and foundry uses. Several ways to accomplish this objective have been proposed, including the construction of tall coke ovens, holding 27 to over 3 tons of coal, as compared with 15 to 18 tons in the average present-day oven. Tall ovens have been developed and used in Europe, and several batteries are under construction or planned in this country and Canada. Also planned is an increase in the oven coking rate by use of high density silica brick and thinner oven wall shapes, allowing more rapid transfer of heat from oven flues to coal. This combination of dense silica and thinner walls has been