This paper gives a general description of the technology development of annular shaft lime kiln in the year of 2015,and introduces the characteristics,advantages,problems and development direction of the kiln in the present situation,finally predicates the development in the year of 2016.

This article gives a brief introduction of the development and classification of pulse bag filter as well as the development trend of de-dusting technology.Also,it systematically introduces the de-dusting design of magnesite deep processing project and the de-dusting equipment selection.

The frame of vertical pre-heater is a key component carrying the entire weight of the pre-heater and guarantees its safe operation.But due to insufficient checking in the process of original design,it caused a large waste of material to ensure safety.By means of finite element analysis,this paper optimized the original frame structure and reduced the total weight without reducing the bearing capacity of the structure.

The low-creep,high anti-abrasion magnesium composite is mainly made of fused magnesia,high purity magnesia and zircon,which is applied at glassmaking furnace regenerator and turns out to be well performed.By adding with zirconium material,the composite is of higher sintering property,lower porosity and higher creep and abrasion resistance.And the formation of inner anti-abrasion phase contributes to high bonding strength under high temperature and better abrasion resistance.

There are so many beam type shaft kilns in China, and most of them are cooled by heat transfer oil.This cooling method is of high consumption and high cost,but the important thing is that too much heat is discharged directly into air by radiators.Based on beam type shaft kiln production process and its operating requirements,the paper proposes a new direct steam cooling process and introduces boiler heat transfer principle into the production process of combustion beam,which realizes beam evaporative cooled and produces saturated or superheated steam output at the same time.This process has practical application value because of energy conservation and emission reduction and heat utilization.

Analysis the generation mechanism of NOx and fire control technology.By analysis and comparing the denitration technology, put forward the denitration control plan for rotary kiln exhaust.

This paper analyzed how raw materials,heat loss and power consumption,process control parameters and other factors influence energy consumption of Maerz kiln during metallurgical lime production process and proposed relevant requirements and methods for this control,which contribute to lower energy consumption and better economic returns.