The regenerative part of blast furnace dehumidification driven by blast furnace waste heat was researched experimentally.In view of different climatic conditions in a place throughout the year the theoretical analysis was made on dehumidifying blast using LiCl solution experimental research was conducted on the 1:200 model to verify the feasibility and regularity of the regenerative part in the liquid desiccant dehumidification driven by the waste heat.The experimental results show that the regeneration effect was related to the ratio of solution to gas,temperature and concentration.There was an optimum liquid/gas ratio in liquid desiccant regeneration.When the mass ratio of liquid to air was 1.25,the efficiency can reach 60.65%;the higher the solution temperature was,the better the regeneration effect;and the lower the concentration,the better the regeneration effect in the regeneration process.The spray temperature of the solution increased from 62.2℃ to 80.1℃,and the mass exchange efficiency increased from 59.32% to 71.35%,but when the spray temperature increased from 75.7℃ to 80.1℃,mass exchange efficiency increased only by 0.95%.During the whole year operation,the concentration was kept unchanged at 40%,the dehumidification was cooled by cooling tower,70℃ solution spray was used for the regeneration,and the potential difference at the inlet was changed to simulate the operation during the whole year.During the running,the amount of dehumidification in the system was equal to the amount of regeneration,the regeneration process can be adjusted easily,and was insensitive to the temperature fluctuation of the heat source,its operation was convenient and the system was stable.