| 摘要 |
This invention relates to inorganic no-bake foundry binder systems and their use s. The binder systems comprise as separate Part A and Part B components: (A) an aqeuous solution of specified phos phoric acids, and (B) a mixture comprising (1) a iron oxide selected from the group consisting of (a) ferrous oxide, (b) ferrofer ric oxide, and (c) mixtures thereof and (2) magnesium oxide. The binder systems are used to prepare foundry mixes which are used to prepare foundry molds and cores. The foundry molds and cores are used to cast metals.
|
