This paper introduces development situation, technology innovation situation and several problems of lime rotary kiln in 2016,and predicates the industry development and technology trends.

This paper gives a general market analysis on double-shaft lime kiln in 2016 and proposes improving measures towards the technical characteristics and the problems,finally predicates the development in the year of 2017.

This paper introduces a new technology of low-calorie gas in oxygen-enriched combustion for lime rotary kiln,and demonstrates the existing problems and solutions of low calorie gas in lime combustion for lime rotary kiln by theoretical analysis and thermal calculation.It concludes that oxygen-enriched combustion can increase the temperature of lime calcination and meet the requirements of product output and quality demand which is suitable and feasible for national conditions and factory conditions.

The service life of refractory is seriously restrict normal production of rotary kiln,which is the bottleneck of lime production process.The reasonable optimal use of refractory can not only reduce the production cost,but also prevent accidents.This article tackles technical problems from four aspects such as brick structure,raw material,chute cross section and anchor hook structure,which brings remarkable effects.

This paper introduces a kind of floating workbench for shaped product molding, which solves the problem of the density differences in different positions of sliding nozzle,and achieves the aims of improving products quality and production efficiency and reducing the production cost.

Flow simulation module of Solidworks software was used to numerical simulate on the cold air supply device for kiln crown of double shaft kiln.Through the contrastive analysis on different types of cold air supply devices，the critical factors were obtained which affect the cooling effect and the device structure was optimized and improved to design the optimal structure of cold air supply device.