Production method for thickening type half organic coating non-oriented silicon steel
A production method for thickening type half organic coating non-oriented silicon steel comprises the following steps: firstly, coating liquid is prepared, the constituents of the coating liquid solution comprises, by weight, 15-35% of dichromic acid saline solution, 4-6% of organic resin, 1-3% of reducing agents, 1-3% of cosolvent, and the balance pure water; the coating liquid solution and water are mixed to form coating liquid, and the proportion between the coating liquid solution and the water is 1.025-1.125g/cm3; secondly, the coating is coated; thirdly, baking, coated strip steel enters a baking furnace for baking, the heating temperature of a drying section of the baking furnace is 390-550 DEG C, the heating temperature of a first heating area section of a baking section is 415-485 DEG C, the heating temperature of a second heating area section is 345-410 DEG C, and the heating temperature of a solidifying section is 260-290 DEG C; the negative pressure of an inlet of the drying section is from -25 Pa to -40 Pa, and the negative pressure of the baking section is from -30 Pa to -40 Pa. The production method for the thickening type half organic coating non-oriented silicon steel thoroughly resolves the problems of coating performances, such that the surface of non-oriented silicon steel coating is rough, the adhesiveness is obviously worse, and the coating turns yellow. 1. Thickened semi-organic coating method for producing non-oriented silicon steel, comprising the following steps: 1) coating solution deployment The weight percentage of the liquid coating solution ingredients: heavy chromium acid salt aqueous solution 15-35%, organic resin 4-6%, reductant 1-3%, cosolvent 1-3%, excess pure water; The liquid coating solution coated with pure water into a final deployment machine spreads the fluid -and-a-half of a, specific gravity is 1.025-1.125g/cm3; The primary liquid and the liquid into a liquid water, its specific gravity is 1.065g/ml -1.080g/ml; 2) coating, the three-roller type counter spreads mode Three-roller coating on the cycle time machine painting roller than 0.8-1.1, fetching cycle time than 0.45-0.72, metering roll cycle time than 0.65-0.75, liquid-fetching, metering rool the 80-100 m; Three-roller type lower coating than cycle time machine painting roller 0.95-1.15, fetching cycle time than 0.49-0.75, metering roll cycle time than 6-10, liquid-fetching, metering rool the 80-100 m; the thickness of the coating is 0.8-1.8 the/single-sided m; the running speed of band steel 140-165mpm; 3) baking After the coated steel strip entering the baking oven for baking, baking oven drying section the heating temperature the 390-550 [...] , a baking section temperature section of the two, the heating temperature of the temperatures 1st the 415-485 [...] , the heating temperature of the temperatures 2nd the 345-410 [...] , a curing section the heating temperature of the 260-290 [...] ; drying section inlet negative pressure control in -25--40 Pa, negative pressure control in the baking section -30--40 Pa. 2. Thickened semi-organic coating method for producing non-oriented silicon steel according to Claim 1, characterized in that step 1) when mixing liquid, such as film thickness 0.8-1.2 the m, masking liquid stock solution of acetic acid in the percentage content of the ethylene resin 8-12%. 3. Thickened semi-organic coating method for producing non-oriented silicon steel according to Claim 1, characterized in that the stated bichromated aqueous solution comprises an aqueous solution of magnesium dichromate, or an aqueous solution of zinc dichromate, the proportion of 1.1-1.4 (20 , g/cm3); the reducing agent is ethylene glycol or glycerine; organic resin as vinyl acetate resin or acrylic resin; cosolvent boric acid. 4. Thickened semi-organic coating method for producing non-oriented silicon steel according to Claim 1, characterized in that the baking oven drying section also are respectively provided with different sector, wherein drying section DS1 the temperature of the heating zones the 390-410 [...] , drying section DS 2-3 the temperature of the heating zones the 430-460 [...] , drying section DS 4-5 the temperature of the heating zones the 460-490 [...]. 5. Thickened semi-organic coating method for producing non-oriented silicon steel according to Claim 1, characterized in that the different sections are respectively provided with the baking section, wherein the baking section 1BS 1-4 region heating temperature is set at the 435-455 within the range of [...] , baking section 1BS 5-8 region heating temperature is set at the 360-380 [...] in the range of.