Insulating lining, use of an alumina-based part, reactor for hydrocarbon reforming and process for hydrocarbon reforming

An insulating lining (1) for insulating a reducing high-temperature atmosphere (6), comprising the following features:

• 1.1 a plurality of layers (2, 3, 4, 5), wherein said plurality of layers (2, 3, 4, 5) are
• 1.1.1 running parallel and
• 1.1.2 adjacent to each other;
• wherein
• 1.2 said plurality of layers (2, 3, 4, 5) comprise a first layer (2) and at least one second layer (3, 4, 5);
• wherein
• 1.3 said at least one second layer (3, 4, 5)
• 1.3.1 is comprised of high temperature resistant material and
• 1.3.2 comprises at least two layers;
• wherein
• 1.4 said first layer (2)
• 1.4.1 comprises alumina-based parts (101, 201), wherein
• 1.4.2 said alumina-based parts (101, 201) comprise at least one hollow alumina-based part (101), said at least one hollow alumina-based part (101) comprising at least one cavity (108), wherein
• 1.4.3 said alumina-based parts (101, 201) form a masonry and wherein
• 1.4.4 said alumina-based parts (101) provide a tongue-and-groove system.