铁磷模拟HLW熔体的腐蚀性能

在铁磷模拟ＨＬＷ熔体和硼硅酸盐熔体ＤＷＰＦ内测量了六种耐火材料的动态腐蚀速度，测量在 １０００～１３００℃之间进行，在铁磷熔体中，致密氧化铝和氧化铬耐火材料有最低的熔线腐蚀速度，二氧化硅、锆英石和ＡＺＳ耐火材料的腐蚀速度比较高．同时，氧化铝和氧化铬耐火材料在铁磷熔体中的腐蚀速度小于它们在硼硅酸盐熔体ＤＷＰＦ中的腐蚀速度．对氧化铬耐火材料来说，其在三种含有模拟ＨＬＷ废料的铁磷熔体中的熔线腐蚀速度＜０．１ｍｍ／ｄａｙ．可以认为商品制造的致密氧化铝和氧化铬耐火材料是可以用来熔化很多铁磷ＨＬＷ废料的，甚至可以熔化含有１６ｗｔ％氧化钠的ＨＬＷ废料．

Corrosion Property of Iron Phosphate Simulated HLW Melts

The dynamic corrosion rate of six commercial refractories was measured in the iron phosphate melts containing simulated HLW and a borosilicate melt (DWPF) at temperatures from 1000 to 1300 C. A dense alumina and a chrome refractory had the lowest melt-line corrosion rate in the iron phosphate melts, whereas the corrosion rate for silica, zircon, and alumina-zirconia-silica(AZS) refractories was somewhat high. In general, the corrosion rate for the alumina and chrome refractory in the iron phosphate melts was no higher than their corrosion rate in the DWPF melt now used at the Savannah River Site. For the chrome refractory, the corrosion rate in three iron phosphate melts containing simulated HLW waste was under 0.1mm/day at the melt line. It is concluded that commercially manufactured, dense alumina or chrome refractories can be acceptable for melting many iron phosphate composition, even in wastes containing up to 16 weight percent soda