Руды железные. Определение содержания кремния. Часть 1. Гравиметрические методы
Название (англ.):
Iron ores; determination of silicon content; part 1: gravimetric methods
Описание (англ.):
The method is based on decomposition of the test portion by 1) sintering with sodium peroxide and treatment with hydrochloric and perchloric acids and treatment with dilute nitric acid, or 2) treatment with hydrochloric, nitric and perchloric acids, evaporation, filtration of silica with any residue, fusion withsodium carbonate and dissolution in hydrochloric and perchloric acids, in both cases evaporation of the solution, filtration of the precipitated silica, ignition, and weighing, treatment of the ignited residue with hydrofluoric and sulfuric acid, ignition, and reweighing. Applies to silicon contents between 1 % and 15 % in natural iron ores, iron ore concentrates and agglomerates, including sinter products.
Заменяет стандарты:
ISO 2598(1980.02)*ISO/DIS 2598(1990.12)*ISO/DIS 2598 DAM(1991.11)
Дата регистрации:
18.01.93
Дата введения:
01.12.92
Код КГС:
А39
Код ОКСТУ:
0710
Код ОКС(МКС):
73.060.10
Код ОКП:
0710
Нормативные ссылки:
BS 7020 PART 5 SECTION 5.1(1993/BSI), EQV ISO 648-1977*ISO 1042-1983*ISO 2596-1984*ISO 3081-1986*ISO 3082-1987*ISO 3083-1986*ISO 7764-1985
Ключевые слова:
CHEMICAL ANALYSIS AND TESTING DETERMINATION OF CONTENT GRAVIMETRIC ANALYSIS IRON ORES SILICON CONTENT CHEMICAL ANALYSIS AND TESTIN