Production system and process for coupling sulfur reduction phosphogypsum and carbon reduction phosphogypsum

• Main Authors: WEI TIANRONG, ZHANG BO, SHI CHANGHUA, XIAO LINBO
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2023
• Subjects: BLASTING; CHEMISTRY; COMPOUNDS THEREOF; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; HEATING; INORGANIC CHEMISTRY; KILNS; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; NON-METALLIC ELEMENTS; OVENS; RETORTS; WEAPONS

The invention provides a production system and process for coupling sulfur reduction phosphogypsum and carbon reduction phosphogypsum, the production system comprises a plurality of suspension preheaters, and the suspension preheaters are sequentially communicated with a pre-calcining furnace and a first gas-solid separator through pipelines; the first gas-solid separator is sequentially communicated with the reduction decomposition furnace, the second gas-solid separator and the weak oxidation furnace through pipelines, a discharge port in the bottom of the second gas-solid separator is communicated with the rotary kiln through a pipeline, and a flue gas channel of the rotary kiln is communicated with the reduction decomposition furnace. The corresponding reduction route can be reasonably selected according to the current price of sulfur and coal, the economical efficiency problem is solved, worries of enterprises are reduced, and the comprehensive utilization and construction enthusiasm of ardealite is acce