BS EN 12912:2012 pdf download
BS EN 12912:2012 pdf download.Products used for treatment of water intended for human consumption一Barite.
2 Normative references
The following documents, in whole or in part are normatively referenced in this document and are indispensable for its application, For dated references, only the edition cited applies, For undated references. the latest edition of the referenced document (induding any amendments) applies
EN 12901:1999, Products used for treatment of waler intended for human consumption — inorganic supporting and fiIterrig materials — Definitions
EN 12902, Products used for treatment of water intended for human consumption — Inorganic supporting and ftltenng ,naten&s — Methods of test
EN ISO 3696, Water for analytical laboratory use — Specification and test methods (ISO 3696)
3 Terms, definitions and symbols
For the purposes of this document, the terms, definitions and symbols given in EN 12901:1999 apply
4 DescrIption
4,1 Identification
4.1.1 ChemIcal name
Banum sulfate
4.1.2 Synonym and common names
Bante, baryte, heavy spar, Uff, cawk,
4.1.3 Chemical formula
BaSO4.
4.1.4 CAS Registry number
13462-86-7.
5.32 Bulk density packed
3 3
The bulk density packed shall be in the range of 2 500 kgim to 2 600 kg/rn 6 Chemical properties
This European Standard specifies the minimum purity requirements for barite used for the treatment of water intended for humeri consumption. Limits are given for impurities commonly present in the product Depending on the raw material and the manufacturing process other impurities may be present and, if so, this shall be notified to the user and when necessary to relevant authorities
Users of this product should check the national regulations In order to clarify whether it iS of appropriate punty for treatment of water intended for human consumption, taking into account raw water quality, contents of other impunties and additives used in the products not stated in this product standard.
Limits have been given for impurities and chemical parameters where these are likely to be present in significant quantities from the current production process and raw materials. If the production process or raw materials lead to significant quantities of impurities, by-products or additives being present, this shall be notified to the user.
The composition of the commercal product shall conform to the requirements specified in Table 1.
NOTE The contents of BaSO4 and acid-soluble material do not inuluence filtration properties but give information about the source of barite.,
After filling, washing and commissioning of a filter system producing dflnking water, bante should not Increase the concentrations of chemical parameters (see [1J).
NOTE Water extractable substances, determined in accordance with the method for anidar materials given In EN 12902. can be used to estimate the leaching of the chemicals specified in EN 12902.
7 Test methods
7.1 Sampling
Prepare the laboratory sae’nple(s) required by the relevant procedures described in EN 12902,
7.2 Analysis
7.2.1 Particle size distribution
The particle size dtstnbution shall be determined in accordance with EN 12902,
7.2.2 Bulk density loose
The bulk density loose shall be determined in accordance with EN 12902.
7.2.3 Bulk density packed
The bulk density packed shall be determined in accordance with EN 12902.
7.2.4 Main product – barium sulfate
7.2.4.1 Principle
Melting of mineral with sodium carbonate followed by disintegration Wi water and filtrabon to recover water insoluble carbonates. The solid is treated with hydrochloric acid solution and the acid insoluble fraction is f,ttered off.
Barium stifate is precp4ated by addition of amrnonium sulfate solution and gravimelrically determined.
7.2.4.2 Reagents
All reagents shall be of recognised analytical grade and the water used shall conform to grade 3 In accordance with EN ISO 3696.
7.2.4.2.1 Ammonium hydroxide solution, Nl-l4OH p = 0,9 gimi.
7.2.4.2.2 Ammonium sulfate solution, INH,4)2S04 100 gil solution.
7.2.4.2.3 Hydrochloric acid, HCI p = 1.18 gtml.
7.2.4.2.4 Sodium carbonate, Na2CO3.
7.2.4.2.5 Sodium carbonate solution, (Na2CO3) 30 g’1 solution.
7.2.4.2.6 Methyl red, 0.5 g/l solution.
7.2.4.3 Apparatus
Ordinary laboratory apparatus and glassware together with the following.
7.2.4.3.1 Platinum crucible.
7.2.4.3.2 Electric furnace, capable of being controlled at (850 * 25) C.
7.2.4.3.3 Porcelain crucible.
7.24.3.4 Oven, capable of being controlled at (105± 2) C.
7.2.4.4 Procedure.
