Method of separating components of Fe-bed ash from coal combustion in fluidized bed boilers

摘要

Method for separating the Fe component from the combustion of coal in a fluidized bed boiler, characterized in that the ash - bed is su -chou via magnetic separation to give magnetic product - a concentrate rich in magnetite iron , consist of a mineral magnetite mineral neoplasms , and non-magnetic product - waste with low Fe content , made up of mineral aluminosilicates neoplasms of Fe , Ca , Mg . As a result of the addition of limestone as a means of desulphurisation saith the cabins - and low mineral content neoplasms gypsum , anhydrite , portlandite , ettringite , and even hannebachitu . Popo - ly fluidized - bed and drift have high leaching - 11.5 to 13 pH , therefore it is necessary to carry out separation processes su - chou way . Both products separation procedure to other operations : magnetic product is purged with dry magnetic separation , if necessary, re-treated is still wet magnetic separation . Nemagnetic s product from basic magnetic separation procedures to control magnetic separation , non-magnetic product for the control of non-magnetic separation is the final product . Products adaptations are specific to their use in industry -sary .