This paper states technical features and reforming measures on annular furnace,which may provide reference for technical improvement of annular furnace.

The heating process of the round steel billet in the annular furnace was researched by the method of the thermal state simulating experiment.

The high temperature measurement equipment and method for the heating of continuous casting slab in the annular furnace are introduced.

Fictitiousemissivity method was introduced into a two-dimensional heat transfer model of steel bar in rotary hearth furnace.

The self learning function and its performance of furnace pressure control for rotary hearth furnace are described mainly.

On the basis of the actual situation of 42 annular heating furnace in Henggang,by means of calculating and analyzing the heat-transfer and oxidation of steel blocks inner the furnace chember,the suitable system of steel blocks heating was determined,as well as the measures and schemes to save energy and reduce consume for the annular heating furnace were proposed.

In Pansteel,the designed capacity of the annular heating furnace for ф508 mm pilger-mill is 60t/h,using natural gas as fuel.

Taking the annular heating furnace of Φ508 mm tube rolling unit of Panzhihua Steel as the investigating subject,combining with on-site programming and debugging experience,the paper introduces the furnace temperature control system,and gives the appropriate measures for on-site problems.

Study and application of on line optimum control for rotary reheating furnace;

Tube optimizing heating control system based on mathematical model of rotary reheating furnace;

The optimal heating-up curves adapted to different types of steel tubes on standard production were obtained in this work in the meth-od of off-line optimization,aimed on the lowest fuel consumption and oxide loss prerequisite heating quality of rotary reheating furnace.

The technical reformation of Φ10.1m circular furnace;