NOVELTY - Lead-acid battery is recycled by cutting lead-acid battery with band-sawing machine to obtain upper cover part, tank body part, polar group part, and acid solution, crushing upper cover part to 50-100 mm particles to obtain plastic-ring-containing lead alloy and plastic, crushing plastic-ring-containing lead alloy to 15-30 mm particles, hydraulic sorting to obtain plastic and lead-antimony alloy, crushing tank body part to 15-50 mm particles, sieving through single-layer vibrating screen to obtain lead paste and plastic, and crushing polar group part to 15-30 mm particles.    USE - Recycling of lead-acid battery (claimed).    ADVANTAGE - Recycling of lead-acid battery is simple and low-cost and has high conversion rate and product purity, and band-sawing machine has simple structure and convenient use, improves recovery rate of lead-acid battery, and reduces environmental pollution, recycling cost, and separation difficulty.    DETAILED DESCRIPTION - Lead-acid battery is recycled by cutting lead-acid battery with band-sawing machine to obtain upper cover part, tank body part, polar group part, and acid solution, crushing upper cover part to 50-100 mm particles to obtain plastic-ring-containing lead alloy and plastic, crushing plastic-ring-containing lead alloy to 15-30 mm particles, hydraulic sorting to obtain plastic and lead-antimony alloy, crushing tank body part to 15-50 mm particles, sieving through single-layer vibrating screen to obtain lead paste and plastic, crushing polar group part to 15-30 mm particles, sieving through double-layer vibrating screen to obtain plastic, lead-calcium alloy, and acid-solution-containing lead paste, performing press-filtering separation on acid-solution-containing lead paste to obtain acid solution and lead paste, performing press-filtering separation on acid solutions to obtain lead paste and dilute sulfuric acid, adding lead paste to reaction tank, adding amino-containing substance with volume ratio lead sulfate in lead paste:amino substance in amino-containing substance of 1:2-10, adding water to adjust liquid-solid ratio to 1-10:1, stirring at room temperature for 0.5-5 hours, adding carbonaceous substance, desulfurizing for 0.5-10 hours, performing solid-liquid separation to obtain desulfurized lead paste and filtrate, washing lead paste with water until neutral, drying at 60-120 degrees C for 1-24 hours to obtain dried lead paste, evaporating and crystallizing filtrate to obtain ammonium sulfate byproduct and evaporation liquid, cooling evaporation liquid to room temperature, returning to reaction tank, treating dried lead paste by calcining lead paste at 400-500 degrees C for 1-10 hours to obtain lead tetroxide which is red lead or by calcining lead paste at 500-650 degrees C for 1-10 hours to obtain lead oxide which is yellow lead, and returning carbon dioxide obtained from calcination to desulfurizing step in which band-sawing machine comprises sawing device, sawing machine body, material pushing device, feeding device, and mesh screen, sawing machine body comprises sawing mechanism seat, vertical baffle plate, blanking vibration beam, rack, sawing machine base, feeding rail, inclined plate, and arc-shaped tank, material pushing device comprises material pushing air cylinder, material pushing air cylinder bracket, feeding baffle plate, feeding roller, and material pushing device mounting bracket, feeding device comprises feeding car, turning mechanism, and lifting clamping mechanism, feeding car comprises car bottom, car motor, and car gear, car bottom contains car guide rail, turning mechanism comprises turning large gear, timing belt, turning pinion gear, turning motor, and turning base, turning base is enclosed by bottom plate and side plate, each corner of turning base near bottom plate contains vibrating cylinder holder, middle of bottom plate contains hollow projection, lifting clamping mechanism comprises clamping guide pole, clamping cylinder, vibrating air cylinder, vibrating guide pole, vibrating box body, and clamping slide frame, clamping slide frame comprises sliding block and movable clamping plate, sawing device comprises 2 sawing mechanism brackets, sawing mechanism, and sawing lifting mechanism, sawing mechanism comprises sawing motor, band-saw wheel, band-saw blade, and sawing frame, and sawing lifting mechanism comprises ball screw and lifting motor.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart for the recycling of lead-acid battery. (Drawing includes non-English language text).