Indirectly heated rotary tubular kiln
    3.
    发明授权
    Indirectly heated rotary tubular kiln 失效
    间接加热旋转管式窑

    公开(公告)号:US4781580A

    公开(公告)日:1988-11-01

    申请号:US51191

    申请日:1987-05-14

    摘要: In a rotary tubular kiln for carrying out gas-solids reactions, comprising an indirectly heated, rotatable reaction tube with inner baffles which is provided with charging and removing devices for solid and gas inlet and outlet lines, the improvement which comprises forming the baffles as a central tube which is sealed on both sides and runs along the total length of the kiln, and a spiral which is tightly connected to the central tube and also to the outer rotatable tube. Lifting blades are uniformly distributed along the inner periphery of the rotatable tube. The kiln is suitable for carrying out oxidation, reduction, chlorination, roasting, decomposition, catalytic, annealling and/or cooling processes, e.g. the conversion of hematite to magnetite or goethite to iron.

    摘要翻译: 在用于进行气体 - 固体反应的旋转管式窑中,包括具有内部挡板的间接加热的可旋转的反应管,其具有用于固体和气体入口和出口管线的装料和除油装置,其改进包括将挡板形成为 两侧密封并沿窑总长度延伸的中心管,以及与中心管以及外部可旋转管紧密连接的螺旋。 提升叶片沿着可旋转管的内周均匀分布。 窑炉适用于进行氧化,还原,氯化,焙烧,分解,催化,退火和/或冷却过程。 赤铁矿转变为磁铁矿或针铁矿转铁。

    Agglomerated ferromagnetic iron particles
    4.
    发明授权
    Agglomerated ferromagnetic iron particles 失效
    聚集铁磁铁颗粒

    公开(公告)号:US4470844A

    公开(公告)日:1984-09-11

    申请号:US324915

    申请日:1981-11-25

    摘要: Spherical agglomerates of surface-stabilized primary particles substantially consisting of iron, having a BET surface of about 5 to 50 m.sup.2 /g, measured on the agglomerate, in non-pyrophoric form and having a bulk density of about 0.5 to 2.0 kg/l and an agglomerate diameter of about 0.5 to 10 mm are produced by(a) reducing in dry phase particles consisting essentially of iron oxide,(b) intensively dispersing the particles in liquid phase,(c) coating the particles with an inorganic and/or organic coating optionally containing corrosion inhibitors,(d) separating the particles from the liquid phase by evaporating the volatile components with a continuously rotating and simultaneously tumbling movement, and(e) subjecting the resulting granulates to a thermal treatment. The particles are especially useful for the production of magnetic recording media.

    摘要翻译: 基本上由铁组成的表面稳定的一次粒子的球形附聚物,具有约5至50m 2 / g的BET表面积,在附聚物上以非自燃形式测量,堆积密度为约0.5至2.0kg / l, 通过(a)在干相中还原基本上由氧化铁组成的颗粒,(b)将颗粒集中分散在液相中,(c)用无机和/或有机物涂覆颗粒,产生约0.5至10mm的团块直径 任选地含有腐蚀抑制剂的涂层,(d)通过以连续旋转和同时翻转的运动蒸发挥发性组分,和(e)使所得颗粒经受热处理,从而将颗粒与液相分离。 颗粒对于制造磁记录介质特别有用。

    Process for the production of rutile mixed-phase pigments
    6.
    发明授权
    Process for the production of rutile mixed-phase pigments 失效
    用于生产金红石混合相颜料的方法

    公开(公告)号:US4919726A

    公开(公告)日:1990-04-24

    申请号:US298382

    申请日:1989-01-18

    IPC分类号: C01G23/00 C09C1/36

    CPC分类号: C09C1/36 C01P2002/30

    摘要: A process for the production of rutile mixed-phase pigments comprising calcinating of a solid mixture of titanium dioxide or titanium oxide hydroxide with a dye-producing compound of a metal, in one or more directly heated, continuously operated rotary kilns, wherein in terms of material flow, air is introduced into the kiln atmosphere countercurrently to the direction of flow of the solids in the second half of the rotary kiln.

    摘要翻译: 一种用于生产金红石混合相颜料的方法,包括在一个或多个直接加热的连续操作的旋转窑中煅烧二氧化钛或氧化钛氢氧化物与金属的染料产生化合物的固体混合物,其中以 材料流动,空气与回转窑后半部分固体的流动方向逆流地引入窑气氛中。

    Use of novel rotary tubular kiln
    7.
    发明授权
    Use of novel rotary tubular kiln 失效
    使用新型旋转管式窑

    公开(公告)号:US4629500A

    公开(公告)日:1986-12-16

    申请号:US637469

    申请日:1984-08-03

    摘要: In a rotary tubular kiln for carrying out gas-solids reactions, comprising an indirectly heated, rotatable reaction tube with inner baffles which is provided with charging and removing devices for solid and gas inlet and outlet lines, the improvement which comprises forming the baffles as a central tube which is sealed on both sides and runs along the total length of the kiln, and a spiral which is tightly connected to the central tube and also to the outer rotatable tube. Lifting blades are uniformly distributed along the inner periphery of the rotatable tube. The kiln is suitable for carrying out oxidation, reduction, chlorination, roasting, decomposition, catalytic, annealing and/or cooling processes, e.g. the conversion of hematite to magnetite or goethite to iron.

    摘要翻译: 在用于进行气体 - 固体反应的旋转管式窑中,包括具有内部挡板的间接加热的可旋转的反应管,其具有用于固体和气体入口和出口管线的装料和除油装置,其改进包括将挡板形成为 两侧密封并沿窑总长度延伸的中心管,以及与中心管以及外部可旋转管紧密连接的螺旋。 提升叶片沿着可旋转管的内周均匀分布。 窑炉适用于进行氧化,还原,氯化,焙烧,分解,催化,退火和/或冷却过程。 赤铁矿转变为磁铁矿或针铁矿转铁。

    Composite pigment of isometric rutile and acicular modified potassium
hexatitanate
    8.
    发明授权
    Composite pigment of isometric rutile and acicular modified potassium hexatitanate 失效
    等量金红石和针状改性的六钛酸钾的复合颜料

    公开(公告)号:US3956006A

    公开(公告)日:1976-05-11

    申请号:US438330

    申请日:1974-01-31

    IPC分类号: C09C1/00 C09C1/36 D21H17/67

    摘要: A white composite pigment, containing isometric rutile pigment particles and acicular modified potassium hexatitanate, is produced by reacting titanium dioxide or a titanium compound which can be converted into titanium dioxide under the reaction conditions in the presence of rutile seeds with a potassium compound which reacts basically under the reaction conditions, a mineralizer and a polyvalent metal fluoride at a temperature of about 700.degree. to 1100.degree.C.

    摘要翻译: 含有等距金红石颜料颗粒和针状改性的六钛酸钾的白色复合颜料是通过使二氧化钛或钛化合物在金红石种子存在下的反应条件下与基本上反应的钾化合物反应的钛化合物反应制备的 在反应条件下,在约700〜1100℃的温度下进行矿化剂和多价金属氟化物。

    Process for the production of rutile mixed-phase pigments
    10.
    发明授权
    Process for the production of rutile mixed-phase pigments 失效
    用于生产金红石混合相颜料的方法

    公开(公告)号:US4917735A

    公开(公告)日:1990-04-17

    申请号:US298602

    申请日:1989-01-18

    摘要: A process for the production of rutile mixed-phase pigments comprising calcinating a solid mixture of titanium dioxide and/or titanium dioxide hydrate with a dye-producing metal compound in an indirectly heated rotary kiln supplied with air, wherein the titanium dioxide comprises an uncalcined, salt-free titanium dioxide having a specific BET surface of 50 to 500 m.sup.2 /g.

    摘要翻译: 一种用于生产金红石混合相颜料的方法,包括在供应有空气的间接加热的回转窑中煅烧二氧化钛和/或二氧化钛水合物的固体混合物与染料产生金属化合物,其中二氧化钛包括未煅烧的, 比表面积为50〜500m2 / g的无盐二氧化钛。