NOVELTY - A calcium superphosphate is produced by (A) providing raw materials, and (B) processing calcium superphosphate. The step (A) includes washing and collecting tail gases by smelting vanadium phosphorus iron in electric furnace to obtain industrial thick phosphoric acid comprising phosphorus pentoxide. The step (B) includes providing hyper calcium waste residue by smelting vanadium iron; making stopping time of mixed material in double-spiral mixer and obtaining mixed size; sending mixed size to piling pool from discharging hole of spiral mixer; performing curing and natural drying.    USE - Method for producing calcium superphosphate (claimed).    ADVANTAGE - The method converts waste materials into the useful materials, reduces production cost and protects phosphorite resource and ecological environment.    DETAILED DESCRIPTION - Calcium superphosphate is produced by (A) providing raw materials, and (B) processing calcium superphosphate. The step (A) includes washing and collecting tail gases by smelting vanadium phosphorus iron in electric furnace to obtain industrial thick phosphoric acid comprising phosphorus pentoxide (P2O5) (33-39.6 wt.%) and adding water to obtain phosphoric acid comprising P2O5 (17-30 wt.%); and moving material by traveling crane to phosphoric acid measuring hopper (5) for future use. The step (B) includes:    (A) providing hyper calcium waste residue by smelting vanadium iron;    (B) adjusting amount of added lime to produce residues;    (C) obtaining calcium residues comprising 40-45% calcium;    (D) using spherical grinding machine (1) to perform spherical grinding on calcium residue to obtain 100 meshes stuffing powders;    (E) measuring materials by measuring hopper (2);    (F) guiding materials into material hopper (4) which is provided with mixing hole (6) at bottom;    (G) mixing stuffing powder with 17-30% phosphoric acid in phosphoric acid measuring hopper in mixing hole at ratio of 0.5-3 :1;    (H) obtaining mixed primary material;    (I) sending mixed materials to double spiral mixer through mixing hole;    (J) adjusting flow of mixing hole and rotation speed of double-spiral mixer;    (K) making stopping time of mixed material in double-spiral mixer for stirring reaction at 10-15 minutes and obtaining mixed size;    (L) sending mixed size to piling pool from discharging hole of spiral mixer;    (M) performing curing and natural drying for 4-5 days;    (N) obtaining block clinker of calcium superphosphate; and    (O) crushing block clinkers by crushing machine to obtain desired goods.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a method for producing calcium superphosphate. (Drawing includes non-English language texts).    Spherical grinding machine (1)    Measuring hopper (2)    Material hopper (4)    Phosphoric acid measuring hopper (5)    Mixing hole (6)