35.
    发明专利
    未知

    公开(公告)号:DE1646572A1

    公开(公告)日:1971-08-26

    申请号:DE1646572

    申请日:1967-01-04

    Inventor: DAVIES BEN

    Abstract: Direct bonded chrome ore/magnesia bricks are prepared by firing a batch consisting of chrome ore and magnesia which has an SiO2 content such that the fired bricks contain 1.0-2.0% SiO2 and the batch has included therein one or more boron compounds such that the fired bricks contain 0.1-0.26% B2O3. The boron may be added to the unfired batch as a boron acid or salt thereof (examples being given) or an organic boron compound which yields B2O3 upon firing.

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