Migration Principle of Chlorine in BF Production

Abstract

By the calculation of material balance, and research on the main processes of income and expenditure of chlorine in BF production , the migration principle of chlorine during BF production process can be concluded. The specific measures on how to reduce its influence in BF production are offered.

Effect of chlorine on the viscosities and structures of blast furnace slags

“…Dangers of chlorine to blast furnace (BF) have recently drawn more concentrations of metallurgists because more HCl and other acid gases were brought into the gas pipelines with erosions and destructions to the pipelines and accessory equipments in the substitution of dry-dedusting for wet-dedusting technology which should have been absorbed by gas washing water in wet-dedusting technology BF. [1][2][3][4] The increase of chlorine in BF system resulting mainly from the injection of low-quality coal and waste plastics, 5,6 the employment of imported ores after seawater beneficiation, sinter sprayed with CaCl 2 7 and coke coked by coal and waste plastics also leads to different degrees of effects on the BF smelting process, metallurgical properties of raw material and fuel and characteristics of molten slag simultaneously, [8][9][10] and the certain extent of circulation and accumulation of chlorine in BF makes these effects more obvious. 11,12 It has been well acknowledged that BF slag could absorb the chlorine, and hence would affect its performance.…”

“…Dangers of chlorine to blast furnace (BF) have recently drawn more concentrations of metallurgists because more HCl and other acid gases were brought into the gas pipelines with erosions and destructions to the pipelines and accessory equipments in the substitution of dry-dedusting for wet-dedusting technology which should have been absorbed by gas washing water in wet-dedusting technology BF. 1–4…”