Fly ash generated by incineration of household waste is endangered, contains two VA, heavy metals and other pollutants, is a real danger of waste. Fly ash disposal has become a global problem, but now it has a new place. After ten years of research and development, the first domestic demonstration project of fly ash disposal completed by BBMG Liulihe Cement Co., Ltd. formally entered the phase of promotion and application of industrialization technology from the beginning of this month. In this production line, there have been hundreds of unmanifested fly ash transformed, has become a valuable cement raw materials and industrial salt.
Yesterday afternoon, at the BBMG Liulihe Cement Plant, staff was reviewing the water quality stabilization buffer pool in the fly ash disposal line.
Fly ash fantasy trip
Leading into the Liulihe cement factory located in Fangshan, Beijing, the project titled "The First Demonstration Line of Fly Ash Disposal in China" was highlighted. Step up, roar bursts, the first thing that catches the eye is the three huge centrifuge, the production line equipment also lined up. Poisonous fly ash here will complete a fantasy trip.
"The soluble part of the fly ash is washed with water to produce an industrial salt; the insoluble part is sent to the cement kiln as raw material for the calcined cement clinker." Zhang Guoliang, manager of R & D center of Liulihe Cement Company, pointed to the production line . It turned out that the professional washing process has become an important step in the disposal of fly ash, through the decanter centrifugal fly ash slurry to achieve solid-liquid separation, soluble in water, chloride and potassium, sodium ions into the sewage and fly ash separation . The separated fly ash is then calcined in a cement kiln up to 1000 ° C. Two VA are cracked at high temperature. After high temperature quenching, heavy metals are also used as ancillary materials for cement production. They are fully cured in cement clinker Among the grid.
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