The main indicator is natural gas production, but there are many other indicators. The details are as follows: national standard GB 10665-89 for calcium carbide products (condition: 20, one atmosphere), gas production rate/grade, first-class products and qualified products.

Particle size: 80-200mm

The gas production is 305L/kg 285L/kg 255L/kg.

H2S content ≤ 0.1v/v ≤ 0.1v/v ≤ 0.15v/v.

Content of PH3 ≤ 0.06 v/v ≤ 0.08 v/v ≤ 0.08 v/v.

Particle size: 50-80mm

The gas output is 3 15 liters/kg 285 liters/kg 255 liters/kg.

H2S content ≤ 0.1v/v ≤ 0.1v/v ≤ 0.15v/v.

Content of PH3 ≤ 0.06 v/v ≤ 0.08 v/v ≤ 0.08 v/v ≤ 0.08 v/v.

Particle size: 5-60mm

The gas output is 300L/kg, 280L/kg and 250L/kg.

H2S content ≤ 0.1v/v ≤ 0.1v/v ≤ 0.15v/v.

Content of PH3 ≤ 0.06 v/v ≤ 0.08 v/v ≤ 0.08 v/v ≤ 0.08 v/v.

Particle size: 5-50 mm gas output 300 liters/kg 280 liters/kg 255 liters/kg.