YS/T 456-2003 Dry barrier powder refractory for aluminum cell

YS/T 456-2014 Dry barrier powder refractory for aluminum electrolysis cell

GB/T 3257.1-1999 Methods for chemical analysis of bauxite—Determination of aluminium oxide content-EDTA titrimetric method GB/T 3257.2-1999 Methods for chemical analysis of bauxite—Determination of silicon dioxide content—Gravimetric—molybdenum blue photometric method GB/T 3257.3-1999 Methods for chemical analysis of bauxite—Determination of silicon dioxide content—Molybdenum blue photometric method GB/T 3257.4-1999 Methods for chemical analysis of bauxite—Determination of iron oxide content—Dichromate titrimetric method GB/T 3257.5-1999 Methods for chemical analysis of bauxite—Determination of iron oxide content—Orthophenanthroline photometric method GB/T 3257.6-1999 Methods for chemical analysis of bauxite—Determination of titanium dioxide content—Diantipyrylmethane photometric method GB/T 3257.7-1999 Methods for chemical analysis of bauxite—Determination of calcium oxide content—Flame atomic absorption spectrophotometric method GB/T 3257.8-1999 Methods for chemical analysis of bauxite—Determination of magnesium oxide content—Flame atomic absorption spectrophotometric method GB/T 3257.9-1999 Methods for chemical analysis of bauxite—Determination of potassium oxide and sodium oxide content—Flame atomic absorption spectrophotometric method GB/T 3257.10-1999 Methods for chemical analysis of bauxite—Determination of manganese oxide content—Flame atomic absorption spectrophotometric method GB/T 3257.11-1999 Methods for chemical analysis of bauxite—Determination of chromium oxide content—Flame atomic absorption spectrophotometric method GB/T 3257.12-1999 Methods for chemical analysis of bauxite—Determination of vanadium pentoxide content—N-benzoyl-N-phenythyroxylamine photometric method GB/T 3257.13-1999 Methods for chemical analysis of bauxite—Determination of zinc content—Flame atomic absorption spectrophotometric method GB/T 3257.15-1999 Methods for chemical analysis of bauxite—Determination the total content of rare earth oxide—Tribromo-arsenazo photometric method GB/T 3257.16-1999 Methods for chemical analysis of bauxite—Determination of gallium oxide concent—Rhodamine B-extraction photometric method GB/T 3257.17-1999 Methods for chemical analysis of bauxite—Determination of phosphorus pentoxide content—Molybdenum blue spectrophotometric method GB/T 3257.18-1999 Methods for chemical analysis of bauxite—Determination of sulfur content—Direct combustion-iodometric method GB/T 3257.20-1999 Methods for chemical analysis of bauxite—Determination of total carbon content—Non-aqueous titrametric method after combustion GB/T 3257.21-1999 Methods for chemical analysis of bauxite—Determination of the loss on ignition—Gravimetric method GB/T 3257.22-1999 Methods for chemical analysis of bauxite—Preparation of pre-dried test samples GB/T 3257.23-1999 Methods for chemical analysis of bauxite—Determination of organic carbon content—Titrimetric method GB/T 3257.24-1999 Methods for chemical analysis of bauxite—Determination of hydroscopic moisture in analytical samples—Gravimetric method GB/T 5990-2006 Refractory materials—Determination of thermal conductivity—Hot-wire method GB/T 5990-2021 Refractory materials—Determination of thermal conductivity,specific heat capacity and thermal diffusivity(hot-wire method) GB/T 7322-1997 Test method for pyrometric cone equivalent(refractoriness) of refractories GB/T 7322-2007 Refractory products—Determination of pyrometric cone equivalent (refractoriness) GB/T 7322-2017 Refractory products—Determination of refractoriness