This standard specifies the requirements, test methods, inspection rules of calcium carbide as well as marking, package, transport, storage and safety.
This standard is applicable to the calcium carbide chemically combined by carbon materials and quick lime in electric arc furnace. This product is mainly used to generate acetylene, produce lime nitrogen and desulfurization agent of iron and steel.
Molecular formula: CaC2
Structural formula:
Relative molecular mass: 64.10 (according to international relative atomic mass in 2001)
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document is applicable to this standard.
GB 190 Packing symbol of dangerous goods
GB/T 601 Chemical reagent--Preparations of standard volumetric solutions
GB/T 603 Chemical reagent--Preparations of reagent solutions for use in test method
GB/T 6682 "Water for Laboratory Use-Specifications" [GB/T 6682-1992, neq "Water for Laboratory Use-Specifications" 3696: 1987]
GB/6003.1 Test sieves of metal wire cloth (GB/T 6003.1-1997, eqv, ISO 3310-1:1990)
GB/T 6678 General Principles for Sampling Chemical Products
GB/T 15956 Calcium carbide steel drum for the home market
3 Requirements
3.1 The calcium carbide shall be in accordance with the technical requirements in Table1.
Table 1: Technical Requirements
Item Index
High-class products First-rate products Qualified products
Gas yield (20℃?101.3kPa)/(L/kg)≥ 300 280 260
Volume fraction of phosphine in acetylene /%≤ 0.06 0.08
Volume fraction of hydrogen sulfide in acetylene /%≤ 0.10
Particle size (5mm~80mm)a≥ 85
Mass fraction of screenings (lower than 2.5mm)/%≤ 5
a The size range of particles in round bracket may be determined by the agreement of the supplier and the purchaser.
