GB/T 21651-2018Regenerated zinc and zinc alloy ingots (English PDF)
再生锌及锌合金锭
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 17, 2018
Implementation date
June 1, 2019
Scope
GB/T 21651-2018 is the English-translated version of 再生锌及锌合金锭.
GB/T 21651-2018 is the Chinese national standard for zinc and zinc alloy ingots made from secondary material.
It sets the requirements - the grades and their chemical composition, the shape and mass of the ingot and its surface condition - and then the test methods, the inspection rules, the marking, packaging, transport and storage, the quality certificate that travels with the lot and what an order or contract has to state.
It applies to ingots produced by smelting and refining zinc scrap, used for galvanising, for die casting alloys and for zinc chemicals. Secondary smelters and their customers use it to agree on a grade.
It replaces GB/T 21651-2008, was issued on 17 September 2018 and has applied since 1 June 2019.
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Document preview — GB/T 21651-2018
National Standard of the People's Republic of China
- ICS
- 77.150.60
- Classification
- H 69
- Replacing
- GB/T 21651-2008
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 21651-2008 "Recycled Zinc Alloy Ingot". Compared with GB/T 21651-2008, except editorial modification To change as follows.
---The standard name was changed from "Recycled Zinc Alloy Ingot" to "Recycled Zinc and Zinc Alloy Ingot";
--- Increased regenerative zinc ingots, regenerative zinc alloy ingots for hot-plating, and increased the corresponding chemical composition requirements (see 4.1, 4.2);
---Modified the chemical composition of ZSZnAl4, ZSZnAl4Cu0.5, ZSZnAl4Cu1 grades in reclaimed zinc alloy ingots for casting (see 4.2.2);
--- Increased the grade of ZSZnAl4Cu0.2 for reclaimed zinc alloy ingots for casting (see 4.2.2);
---Add other requirements (see 4.5);
--- Added order form (or contract) content (see Chapter 8).
1 Scope
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificates of recycled zinc and zinc alloy ingots.
And the contents of the order form (or contract).
This standard is applicable to regenerated zinc and zinc alloy ingots produced by smelting and processing of zinc secondary materials. Used for galvanizing, casting, alloying, Chemical, electrical and other fields.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document.
For the undated references, the latest edition (including all amendments) applies to this document.
GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values Methods of chemical analysis of zinc and zinc alloys - Part 1 . Determination of aluminium content chrome azurol S - polyethylene glycol octyl phenyl Ether-hexadecyl bromide spectrophotometry, CAS spectrophotometry and EDTA titration Methods for chemical analysis of zinc and zinc alloys - Determination of cadmium content by flame atomic absorption spectrometry Methods for chemical analysis of zinc and zinc alloys - Determination of copper content - Diethyldithiocarbamic acid lead spectrophotometric method, Flame atomic absorption spectrometry and electrolysis
GB/T 12689.5 Methods for chemical analysis of zinc and zinc alloys - Determination of iron content - sulfosalicylic acid spectrophotometric method and flame atomic absorption Spectroscopy
GB/T 12689.6 Methods for chemical analysis of zinc and zinc alloys - Determination of lead content Methods of chemical analysis of zinc and zinc alloys - Part 7. Determination of magnesium content by flame atomic absorption spectrometry
GB/T 12689.9 Methods for chemical analysis of zinc and zinc alloys - Determinations by mass spectrometric method Methods for chemical analysis of zinc and zinc alloys - Determination of tin content - Phenyl ketone - cetyltrimethyl bromide spectrophotometric method
GB/T 26043 zinc and zinc alloy sampling method
YS/T 310 zinc alloy ingot for hot plating
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Zinc secondary material
A zinc-containing material that is distinguished from zinc minerals that naturally occur in nature.
Note: The zinc secondary materials include three types. The first category is zinc-associated lead ore, copper ore and iron-bearing materials produced during the production of lead, copper and iron.
Such as lead slag slag, copper soot, blast furnace gas ash (mud). The second category is zinc-containing waste produced during the use of zinc-containing products, including the use of hot-dip galvanizing.
The galvanizing slag generated during the anti-corrosion hot-dip plating of steel is produced by using the electroplating mud generated during zinc plating and pressing the finished product with a zinc alloy ingot for casting.
Containing zinc residue, etc. The third category is scrapped zinc-containing end-consumer products such as brass alloys, cast alloy products, dry battery shells and galvanized scrap in recycling.
During the smelting process, the zinc in the galvanized layer of the steel is volatilized in a gaseous state and the soot collected by the flue gas entering the dust collecting system.
3.2 Recycled zinc ingot regeneratedzincingots
Fully adopting various zinc secondary materials, generating yin by processes other than fluorine, enrichment, leaching, purification, electrowinning, etc., independent of the original zinc ore smelting
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 8170Rules of rounding off for numerical values & expression and judgement of limiting values
- GB/T 12689.5The methods for chemical analysis of zinc and zinc alloys--The determination of iron content--The sultosalicylic acid spectrometric method and the flame atomic absorption spectrometric method
- GB/T 12689.6The methods for chemical analysis of zinc and zinc alloys -- The determination of lead content -- The oscillopolarographic method
- GB/T 12689.9The methods for chemical analysis of zinc and zinc alloys--The determination of antimony content--The atomic fluorescence spectrometer and the flame atomic absorption spectrometric method
- GB/T 26043Zinc and zinc alloys -- Method of sampling, Specifications
YS/T 310
Similar standards
Editions of GB/T 21651
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 21651-2018 | Regenerated zinc and zinc alloy ingots | current edition | Current |
| GB/T 21651-2008 | Regenerated zinc and zinc alloy ingots | previous edition | Superseded |
This page sells the current edition, GB/T 21651-2018. Earlier editions are listed for reference only.
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Related Standards
GB/T 12689.5-2004 — The methods for chemical analysis of zinc and zinc alloys--The determination of iron content--The sultosalicylic acid spectrometric method and the flame atomic absorption spectrometric method
GB/T 12689.6-2004 — The methods for chemical analysis of zinc and zinc alloys -- The determination of lead content -- The oscillopolarographic method
GB/T 12689.9-2004 — The methods for chemical analysis of zinc and zinc alloys--The determination of antimony content--The atomic fluorescence spectrometer and the flame atomic absorption spectrometric method
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