Meanwhile,the basic theory,process,product quality and the characteristics of producing magnesium hydroxide by the method of seawater or brine with light-burnt dolomite precipitation were introduced.

This paper describes the advantage of green safety neutralizer slurry Magnesium Hydroxide material used in the environmental field,analyses simply the shortcomings of the traditional production methods and mainly introduces the basic theory,process,product quality and the characteristics of producing Magnesium Hydroxide by the method of Seawater or Brine with Light-burnt dolomite Precipitation.

Aiming at the differences of the dolomite calcination technics in the process of the pidgeon's magnesium reduction,three industrial kilns to calcine dolomite(rotary kiln,erect kiln and fluidized calcinator)are discussed,and their advantages and disadvantages,the general situation from domestic and international development respectively are compared.