The discharge of solid waste phosphogypsum from large-scale domestic diammonium phosphate production enterprises has always been a headache. The phosphogypsum storage yard of Anhui Tongling Chemical Group Co., Ltd. is now shrinking. Every day, large-scale transport trucks are constantly transporting phosphogypsum to Lvyang Building Materials and Faraday gypsum board plants, becoming raw materials for cement retarders, additives, and gypsum boards.
In 2000, Tonghua Group put forward the business philosophy of “advocating green chemicals and upgrading traditional industries†and focused on the comprehensive utilization of “three wastesâ€. The company invested 30 million yuan to build a production line of 100,000 tons of phosphogypsum modified and enhanced balls in 2001. In 2004, it expanded its scale and accumulated 1.4 million tons of gypsum residue by the end of 2004.
In order to reduce energy consumption and water consumption and realize waste recycling, Tonghua Group has accelerated the pace of technological transformation. Six Kingdoms Chemicals Co., Ltd. implements a "closed cycle" for the entire production process, and adopts advanced ammoniated pelletized ammonium phosphate production processes and tubular reaction production processes to achieve the reduction of production raw materials; the chain furnace is changed to boiling The fluidized bed boiler will remove incompletely burned coal particles from the cyclone and return it to the furnace for secondary combustion; the original cyclone dust collector will be replaced by a venturi water film dust remover to treat the exhaust gas. The production effluent was completely closed-circuit and the zero discharge of production effluent was realized.
From the minimization of pollutant discharge at the enterprise level to the exchange of waste between enterprises, the Tonghua Group has also made painstaking efforts. Tongguanshan Chemical Co., Ltd. invested 800,000 yuan to develop an annual output of 2 tons of ammonium bisulfite used in the paper industry, so that the discharge of pulp black liquor is harmless, and contains nitrogen, phosphorus, potassium and other beneficial to the growth of crops. Elements can be used for irrigation of farmland. In October 2004, the Group invested 10 million yuan to build an iron oxide production plant using ferrous sulfate as a by-product of titanium dioxide, which could add up to an annual production value of 40 million yuan. An Titanium Company uses the waste heat produced by other companies to dry its products. The waste acid produced in the production process is used by the compound company of Tongguanshan Chemical Company for compound fertilizer production. The industrial chain of a company's circular economy has grown longer and longer.
In 2000, Tonghua Group put forward the business philosophy of “advocating green chemicals and upgrading traditional industries†and focused on the comprehensive utilization of “three wastesâ€. The company invested 30 million yuan to build a production line of 100,000 tons of phosphogypsum modified and enhanced balls in 2001. In 2004, it expanded its scale and accumulated 1.4 million tons of gypsum residue by the end of 2004.
In order to reduce energy consumption and water consumption and realize waste recycling, Tonghua Group has accelerated the pace of technological transformation. Six Kingdoms Chemicals Co., Ltd. implements a "closed cycle" for the entire production process, and adopts advanced ammoniated pelletized ammonium phosphate production processes and tubular reaction production processes to achieve the reduction of production raw materials; the chain furnace is changed to boiling The fluidized bed boiler will remove incompletely burned coal particles from the cyclone and return it to the furnace for secondary combustion; the original cyclone dust collector will be replaced by a venturi water film dust remover to treat the exhaust gas. The production effluent was completely closed-circuit and the zero discharge of production effluent was realized.
From the minimization of pollutant discharge at the enterprise level to the exchange of waste between enterprises, the Tonghua Group has also made painstaking efforts. Tongguanshan Chemical Co., Ltd. invested 800,000 yuan to develop an annual output of 2 tons of ammonium bisulfite used in the paper industry, so that the discharge of pulp black liquor is harmless, and contains nitrogen, phosphorus, potassium and other beneficial to the growth of crops. Elements can be used for irrigation of farmland. In October 2004, the Group invested 10 million yuan to build an iron oxide production plant using ferrous sulfate as a by-product of titanium dioxide, which could add up to an annual production value of 40 million yuan. An Titanium Company uses the waste heat produced by other companies to dry its products. The waste acid produced in the production process is used by the compound company of Tongguanshan Chemical Company for compound fertilizer production. The industrial chain of a company's circular economy has grown longer and longer.
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