Calcium Carbide
1. Physical character:
Industrial products is gray, snuff color or black solid, contain higher of calcium carbide is purple. New fracture of calcium carbide has luster, reveal in the air to lose lustre show offwhite because of the calcium carbide imbibe moisture. Relative density 2.22 (18 centigrade). Industrial product calcium carbide content 80%. Melting point 2300 centigrade. Can conduct electricity, the higher purity, the higher conduct electricity. Chemical property is very lively, at the appropriate temperature can reaction with a lot of gas, solution. Touch with water drastic decompound and bring acetylene and calcium hydroxide, disengaging large numbers of heat. Has drastic chemical reaction with chlorine, hydrogen chloride, sulfur, phosphorus, alcohol etc. At high temperature.
2. Specification:
FIRST GRADE
L/KG: >295
pH3% (V/V): 0.08
H2S % (V/V): 0.10
3. SIze:
0-2mm 2-4mm 4-7mm 7-15mm 15-25mm 25-50mm 50-80mm 70-100mm 100-120mm
4. Packaged in 50kg iron drums, 100kgiron drums, 200kg iron drums.
5. Use:
(1)Reacting with water to bring about ethine.
(2) Reacting with nitrogen to product lime nitrogen.
(3)The desulfurizer in steel industry

Items		Index
		Top quality	First quality	Qualified products
gas release (20°C?101.3 kPa)/(L/kg) ≥50-80mm		300	280	255
gas release (20°C?101.3 kPa)/(L/kg) ≥25-50mm		300	280	250
gas release (20°C?101.3 kPa)/(L/kg) ≥15-25mm		300	280	250
Phosphine’s volume fraction in acetylene /% ≤		0.06	0.08
Sulfureted hydrogen’s volume fraction in acetylene /% ≤		0.1
Granularity (5mm-80mm)a’s mass fraction /% ≥		85
Screenings (below 2.5mm)’s mass fraction /% ≤		5
Size,mm	Within the limit of the size %	2.5 mm siftage ,%	Ash %
50-80	Min85	Max5	Max1
25-50	Min85	Max5	Max1
15-25	Min 85	Mas 5	Mas 1