マンガン団塊浸出残渣の軽量骨材化に関する基礎的研究

抄録

In order to establish available process for utilization of manganese nodule production light weight aggregate from their residue which were treated with hydrochloric acid solution have been investigated.
The relation of some properties to bloating of pelletized sample have been inquired by chemical analysis, X-ray diffraction analysis, size distribution and by measuring specific gravity, water absorption, strength under compression etc. Further, the effects of bentonite to bloating of pelletes have been also examined.
The main results obtained were summarized as follows;
1) By proper arrangement of bentonite, the chemical components were found to be in the Riley expansion range of system SiO₂-Al₂O₃-Flux.
2) The mineral contents of residue were primarily quartz, with the presence of feldspars and magnetite, and these ofb entonite were primarily montomorillonite, with quartz and feldspars. Furthermore, mineral constituents of bloated pellets of the mixture of residue and bentonite were cristobalite, together with feldspars and iron oxide.
3) In the case of residue, the contraction of pelletes started at 750 C, and larger contractibility was showed with risingof temperature from 1000°to 1250°. In the case of bentonite, the expansion of pelletes started at 850°, and larger expansibility was showed with rising of temperature from 1000°.
When the rising rate of heating temperature was 80°/min and bloating temperature was 1250°, and expansion ratio of mixed pelletes (residue 60%+bentonite 40%) was about 60%. On such bloating condition for pelletes, the production of light weight aggregates could be expected.