Zero-emission environment-friendly phosphating process
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A zero-emission, process technology, applied in the field of phosphating process, can solve problems such as inability to completely replace, achieve significant environmental benefits and economic benefits, simplify processes, and save equipment and equipment investment.
Inactive Publication Date: 2014-02-26
SHANGHAI JINTIAN RUST REMOVAL & RUST PROOF CO LTD
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Embodiment 1
[0016] A zero-emission environmentally friendly phosphating process, taking H 3 PO 4 2H 2 O 20%, M(H 2 PO 4 )·xH 2 O 15%, Na 2 O mSiO 2 5%, KT1 2%, H 2 O 58% mixed, fully stirred, let stand, until the bubbles disappear, adjust the density to 1.20±0.05, to get light milky white or colorless transparent zero-emission environmental protection phosphating solution. Normal temperature treatment, zero discharge by brushing and wiping, zero discharge by dipping and spraying, no waste liquid, waste water, waste gas discharge, and no pollution. Phosphating agent components are non-toxic and harmless phosphoric acid, compound phosphate, silicate, KT additive and clean water, and the solution density is 1.19. The process adopts the zero discharge of the double-slot and multi-slot process. The steps are: (1) replenish the new solution with a density of 1.19 consumed by the workpiece; Increase the density of the bath solution; (3) properly add water to dilute to keep the density ...
Embodiment 2
[0018] A zero-emission environmentally friendly phosphating process, taking H 3 PO 4 2H 2 O 50%, M(H 2 PO 4 )·xH 2 O 30%, Na 2 O mSiO 2 10%, KT1 2%, H 2 O 8%, mix, stir thoroughly, let stand until the bubbles disappear, adjust the density to 1.45-1.55, and obtain light milky white or colorless clear zero-emission environmentally friendly high-density phosphating concentrate. The zero-discharge process is normal temperature treatment, zero discharge by brushing and wiping, zero discharge by dipping and spraying, no waste liquid, waste water, waste gas discharge, and no pollution. Phosphating agent components are non-toxic and harmless phosphoric acid, compound phosphate, silicate, KT additive and clean water, and the solution density is 1.55. The process adopts the zero discharge of the single-tank process, and the steps are: (1) dilute the 1.55 solution with water according to the weight ratio to the working liquid tank solution with a density of 1.18; (2) immerse the...
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Abstract
The invention relates to a zero-emission environment-friendly phosphating process. A phosphating agent respectively comprises the following components in percentage by weight: 5-35% of H3PO4.2H2O, 5-30% of M(H2PO4)n. xH2O, 5-15% of Na2O.mSiO2, 0.5-2% of KT1 and the balance of H2O. A dual-bath and multi-bath process is adopted in emission of the process for realizing zero-emission. The process comprises the following steps: (1) replenishing a new solution with the density of 1.15-1.25, which is consumed by a workpiece; (2) enabling the workpiece to bring a bath solution with the density of 1.15-1.25 into a bath with the density of 1.05-1.10 to increase the density of the bath solution; (3) appropriately adding water for dilution to keep the density of the bath solution of 1.05-1.10 unchanged; and (4) replenishing, diluting and adjusting the bath solution in the bath of 1.15-1.25, which is consumed by the workpiece and has the density increased by evaporation, by using the bath solution of 1.05-1.10. According to the technology, process steps and the process are greatly simplified; the process has the advantages of zero emission, no three wastes, zero pollution, low cost and significant environment-friendly benefits and economic benefits, and is capable of saving water by above 99% and reducing pollutants by 100% and easy to control and construct.
Description
technical field [0001] The invention relates to a zero-emission and environment-friendly phosphating process, which belongs to the technical field of phosphating process. Background technique [0002] Iron and steel phosphating technology has been developed for nearly a hundred years, and both developed and developing countries have their own brands. However, with the scale of industrial production and the standardization of phosphating process technology, various phosphating production lines serving the coating industry have seriously consumed energy and water and polluted the environment; especially some small and medium-sized enterprises, most of them use disordered phosphorus Chemical treatment has further aggravated the deterioration of the water environment. There is an urgent need for new phosphating technologies and processes that are harmless and environmentally friendly to replace traditional phosphating technologies and processes that pollute the environment. I...
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IPC IPC(8): C23C22/07
Inventor 陈金田周义云
Owner SHANGHAI JINTIAN RUST REMOVAL & RUST PROOF CO LTD
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