ISO 20202:2004 pdf download

10-12-2020 comment

ISO 20202:2004 pdf free download.Carbonaceous materials used in the production of aluminium — Cold and tepid ramming pastes — Preparation of baked test pieces and determination of loss on baking.
ISO 20202:2004 describes a method of baking green test specimens made by compacting carbonaceous ramming pastes. It includes the baking procedure (heating rate and holding time) and the determination of the loss on baking.
Baked test specimens of ramming paste need to be prepared for the determination of properties after baking, for instance apparent density, crushing strength and porosity.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated eferences, only the edition cited applies For undated references, the latest edition of the referenced document(including any amendments )applies.
ISO 4955, Heat-resisting steels and alloys;
ISO 5725-2, Accuracy(trueness and precision)of measurement methods and results-Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method;
ISO 1442 Carbonaceous mae used in the producto of alumnmCod-rammng astes-Methods of sampling;
ISO 14427, Carbonaceous materials used in the production of aluminium -Cold and tepid ramming pastes -Preparation of unbaked test specimens and determination of apparent density after compaction.
Principle
Compacted test specimens of carbonaceous ramming paste are baked in a furnace by raising the temperature t a specified rate to 1 000C and holding the temperature at this value for 2 h. The mass of each test specimen is measured before and after baking and the loss on baking calculated.
4 Apparatus
4.1 Balance, accurate to 0, 1 g
4.2 Furnace, e.g. an electrically heated muffle furnace or chamber furnace, with a temperature-control facility enabling it to meet the requirements given in Clause 6.

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