会员体验
专利管家（专利管理）
工作空间（专利管理）
风险监控（情报监控）
数据分析（专利分析）
侵权分析（诉讼无效）
联系我们
交流群
官方交流：
QQ群： 891211   
微信请扫码    >>>
现在联系顾问~
下载
著录项
PDF全文
热词
    • 3. 发明专利
      GB418859A A process for obtaining products containing spinels 未知
    • A process for obtaining products containing spinels
    • GB418859A
    • 1934-11-01
    • GB2551333
    • 1933-09-14
    • TURE ROBERT HAGLUND
    • C04B35/01 , C04B35/12 , C04B35/42 , C04B35/44
    • Products containing spinels and it may be also periclase crystals are obtained by melting materials containing magnesium oxide and either or both aluminium oxide and chromic oxide, together with silica and calcium oxide in such proportions that the molecular proportion of calcium oxide is at least equal to that of the silica, and subjecting the product after cooling to dressing and/or treatment with solvents to remove the silicates. In producing the spinels up to 10 per cent of the magnesium oxide may be replaced by ferrous oxide. The solidified mass preferably contains at least 20 per cent of calcium silicates, and by having present more than 2 mols. of calcium oxide per mol. of silica, products which break down on cooling to lumps and powder are obtained. Wet or dry mechanical treatments including grinding or magnetic separation may be used singly or in combination for removing the silicates, and as solvents aqueous sulphur dioxide, hydrochloric acid, aluminium chloride, or sulphuric acid may be used. When using solvents silica remaining in the mass may be separated mechanically or be left admixed with the spinels. The production of spinels may be combined with the production of chromium or chromium alloys, in which case spinels containing chromium may be readily obtained. Alternatively a charge comprising dolomite and bauxite, with or without chromite may be used, and when an excess of magnesium oxide is present, periclase crystals are also obtained. The products may be used as grinding materials, for refractory coatings or linings or for the production of refractory articles. Those with a high percentage of chromium oxide may be used for the production of chromium or its alloys. They may be mixed with corundum, magnesite, periclase, or chromium ore, and may be used as main component or as filling material in the production of shaped bodies by moulding under pressure and heating say to 1700 DEG C. In this connection binding media which may be used include sulphite liquor, clay, kaolin, aluminium silicates, silicic acid, quartz, bauxite, ferrous oxide, sillimanite, and ferric oxide.ALSO:In the production of ferrochromium from a charge comprising chromium ore, bauxite, and lime, the charge constituents are used in such proportions that the slag on cooling yields spinels and contains at least one and preferably more than two mols. of calcium oxide per mol. of silica. An example is given.ALSO:Products containing spinels and it may be also periclase crystals are obtained by melting materials containing magnesium oxide and either or both aluminium oxide and chromic oxide, together with silica and calcium oxide in such proportions that the molecular proportions of calcium oxide is at least equal to that of silica, and subjecting the product after cooling to dressing and/or treatment with solvents to remove the silicates. In producing the spinels, up to 10 per cent of the magnesium oxide may be replaced by ferrous oxide. The solidified mass preferably contains at least 20 per cent of calcium silicates, and by having present more than 2 mols. of calcium oxide per mol of silica, products which break down on cooling to lumps and powder are obtained. Wet or dry mechanical treatments, including grinding, or magnetic separation may be used singly or in combination for removing the silicates, and as solvents aqueous sulphur dioxide, hydrochloric acid, aluminium chloride, or sulphuric acid may be used. When using solvents silica remaining in the mass may be separated mechanically or be left admixed with the spinels. The production of spinels may be combined with the production of chromium or chromium alloys, in which case spinels containing chromium oxide may be readily obtained. Alternatively a charge comprising dolomite and bauxite, with or without chromite or magnesite may be used, and when an excess of magnesium oxide is present, periclase crystals are also obtained. The products may be used for refractory coatings or linings or for the production of refractory articles. They may be mixed with corundum, magnesite, periclase, or chromium ore, and may be used as main component or as filling material in the production of shaped bodies by moulding under pressure and heating say to 1700 DEG C. In this connection binding media which may be used include sulphite liquor, clay, kaolin, aluminium silicates, silicic acid, quartz, bauxite, ferrous oxide, sillimanite, and ferric oxide.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 4. 发明专利
      GB391662A Improvements in and relating to the manufacture of refractory substances 未知
    • Improvements in and relating to the manufacture of refractory substances
    • GB391662A
    • 1933-05-04
    • GB2320732
    • 1932-08-18
    • TURE ROBERT HAGLUND
    • C04B35/01 , C04B35/12 , C04B35/42 , C04B35/44
    • A refractory material for producing blocks or bricks by casting has as its principal constituent magnesia spinel crystals MgO, R2O3, in which R2O3 is Al2O3 or in part Al2O3 and in part another sesquioxide, such as Cr2O3 in the proportion of less than 10 per cent of the alumina; the material also contains 8-40 per cent of silicates, titanates, or calcium aluminates melting more easily than spinels, the magnesium oxide and calcium oxide content of these more easily melting constituents being only small or alternatively amounting to more than 45 per cent and the proportion of lime and iron oxide being not more than 8 per cent of the whole. The amount of aluminium is regulated so that it does not exceed the amount which would be present in 100 per cent spinel formation. Up to 10 per cent of other oxides such as FeO, MnO, and BeO may be substituted for magnesia. The product may be cast in the required form, or may be granulated after cooling and formed into blocks by the use of binders such as chromite or magnesite; the use of clay is to be avoided. The preferred method of manufacture is to melt in an electric furnace a charge consisting of magnesite and bauxite. Lime or dolomite, silica, rutil, and pyrolusite may also be present. Any excess of iron is removed by reduction during the melting process. Specifications 302,087, 324,312, [both in Class 22, Cements &c.], 343,896, and 371,905 are referred to.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
每页展示10个专利
每页展示10个专利
每页展示20个专利
每页展示50个专利
每页展示100个专利

IPRDB

最新中国发明专利 最新美国发明专利 技术领域 专利库 专利分类库 国际专利分类库

热门服务

会员版试用 API 数据接口 找代理 知嘟嘟专利交易 排行榜 大学排行榜 专利百科

关于我们

平台介绍 战略合作 网站地图

友情链接

知嘟嘟专利交易 国家知识产权局 中国商标网

联系方式


©2019-2023 上海吉码数字技术有限公司 版权所有，并保留所有权利 沪ICP备20016256号-6 沪公网安备31011702005475号