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1. The product produced by the whole set of equipment should meet the following the quality standards:
Potassium sulfate
Description Index
Content of potassium oxide (K2O) % ≥ 50
Content of chlorine (CL) % ≤ 1.5
Content of moisture % ≤ 1.0
Content of free acid (H2SO4) % ≤ 0.5
Appearance White
Productivity/day (one furnace) ≥ 29 tons

Hydrochloric acid
Description Index
Content of total acid (calculated by HCL) % ≥ 31
Content of iron (Fe) % ≤ 0.005
Content of oxide (calculated by CL-) % ≤ 0.05
Content of burnt leavings (H2SO4) % ≤ 0.08
Content of sulfate (calculated by SO42-) % ≤ A acid: 0.005 B acid: 0.5-0.75
Content of arsenic (AS) % ≤ 0.0001

2．The whole set of equipment supplied by the seller should achieve the following economic index of production technology

Consumption ration of the process for per ton potassium sulfate
Description Specification Unit Quantity Remark
Potassium chloride K2O 60% Kg 860
Sulfuric acid H2SO4 98% Kg 570
Calcium oxide powder Kg 40
Electricity V=440 60HZ kwh 60-70
Natural gas M3 85
Water used for process ≤ 30℃ M3 1.2
Compensative water for cooling M3 10
3．The quality of raw material supplied by the buyer should meet the following quality standards:
Potassium chloride
Description Index
Content of K2O % ≥ 60
Content of moisture % ≤ 1.0
Color and shape White powder
Sulfuric acid
Description Index
Content of sulfuric acid (H2SO4) % 98-98.5
Content of ash % ≤ 0.03
Content of iron (Fe) % ≤ 0.005
Content of arsenic (AS) % ≤ 0.0001
Transparent degree mm ≥ 50
Suspended matter ≤ Nil