The major factors that restrict the expansion of Beckenbach kiln from 500t•d-1 to 550t•d-1 are described. The corresponding technical modification proposal is studied and discussed, the equipment modification is organized and implemented successfully and practical result is achieved. The use for reference and guiding significance are provided for the modification and design of the same type kilns.

Used as coke oven refractories, silicamortar is as important as silica brick to the life of coke oven. Therefore, to meet the requirement of super large volume coke oven, this paper focuses on the influence of various factors to the performance of silicamortar starting with the proportion of raw materials.

The energy-saving type vertical kiln is characterized by less investment, simple operation,short circle of construction, low energy consumption and so on, the more important point is that waste gas can be recovered and treated. Seven-layer kiln lining combination is used, which has a good thermal insulation performance. The cheap anthracite chip can be used as fuel. The production with hidden fire operation can control the standard coal consumption of each ton of lime within 145kg. The implementation of hidden fire operation can make the full utilization of the heat generated by fuel combustion and the limestone fed into the kiln can be fully preheated.

Kiln car is one of important integral part of tunnel kiln. The timely repair of worn kiln cars and safety travel of kiln cars in tunnel kiln have an important effect on the normal operation of tunnel kiln and heating schedule in tunnel kiln. We use the method of steel plate welding to the kiln front end to repair worn kiln car to make firing state more stable and to improve product quality. Through taking the measure of hole-drilling on kiln wall to rake sand, observe and remove the accumulated sand in tunnel kiln, the safety travel of kiln car and normal operation of tunnel kiln are ensured.

The process plan and construction investment for the phase Ⅱ magnesia lime production project are described. During production process, the crushing process for metallurgical magnesia lime is optimized. The rationality and advanced feature of the process of the new plan are expounded from the aspects of construction investment, operation result and so on.

Alumina hollow ball castable is produced with alumina hollow ball having different grain sizes as raw material and gel formed by silica fume as binder. Electro-fused magnesia is added in the castable to study the effect of magnesia in the electro-fused magnesia on the property of alumina hollow ball castable bonded by gel.