Method for producing belite-gypsum material from roasted sludge and waste gypsum of furnace in fluid bed
A technology of gypsum materials and waste gypsum, which is applied in the field of production of belite-gypsum materials, can solve the problems of not providing synchronous large-scale consumption of waste slag, etc., and achieve the problems of flammability, fast hardening, and reduction of grinding energy consumption Effect
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[0045] Example 1
[0046] (1) The original sludge of the sewage treatment plant, the water content of the sludge is 99%, and the solid content of the dry basis is 1%. Cement powder for ridge seeding agent, the amount of cement powder is 4Kg per ton of sludge; use the ZC-D1 powder activation modification accelerator developed by Changsha Zichen Technology Development Co., Ltd. The dosage is the mass ratio of ridge seeding agent 50% of the sludge is 2Kg per ton of sludge.
[0047] Pump the sludge into a ridged tank, add cement powder and accelerator powder to the sludge under continuous stirring, and continuously stir at 120 rpm for 2 hours to seed the ridges, and the treated sludge mixture Pump into the chamber filter press for solid-liquid separation to obtain solid modified sludge. The filtrate is clean water. The moisture content of the modified sludge is detected to be 34.6%, which is directly used for raw meal ingredients;
[0048] Use phosphogypsum bulk material for waste gyps...
Example Embodiment
[0060] Example 2
[0061] (1) The original sludge of the sewage treatment plant was modified by ridge seeding, and the water content of the sludge was 98.2% and the solid content of the dry basis was 1.8%. Cement powder for ridge seeding agent, the amount of cement powder is 9Kg per ton of sludge; use the ZC-D2 powder activation modification accelerator developed by Changsha Zichen Technology Development Co., Ltd. The dosage is the mass ratio of ridge seeding agent 50% of the sludge, which is 4.5Kg per ton of sludge.
[0062] The sludge is pumped into the ridge tank, cement and accelerator powder are added to the sludge under continuous stirring, and the sludge mixture is continuously stirred at 90 revolutions per minute for 2 hours to crystallize the ridges and seed the ridges. The chemically treated sludge mixture is pumped into a chamber filter press for solid-liquid separation to obtain a solid modified sludge. The filtrate is clean water. The moisture content of the modified ...
Example Embodiment
[0074] Example 3
[0075] (1) The sludge in the county seat of Qinggou was modified by ridge seeding, and the water content of the sludge was 78.3% and the solid content of the dry basis was 21.7%. Cement powder for ridged seeding agent, the amount of cement powder is 50Kg per ton of sludge. The ZC-D3 powder activation modification accelerator developed by Changsha Zichen Technology Development Co., Ltd. was selected, and the dosage was 50% of the mass ratio of the ridge seeding agent, that is, 25Kg per ton of sludge.
[0076] The sludge is pumped into the ridged tank with a plunger pump, cement and accelerator powder are added to the sludge under continuous stirring, and the sludge mixture is continuously stirred at 90 revolutions / min for 3 hours to seed the ridges. The sludge mixture is pumped into a chamber filter press to filter and dehydrate to obtain a solid modified sludge. The filtrate is clean water. The moisture content of the modified sludge is 31.4%. The modified sludg...
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