Studies Of The New Technology Of Continuous Bubbling Carbonation For Producing Super-fine Calcium Carbonate

As the cheapest nanometer materials, the broadest and novel inorganic functional filling material in applying, and the highest level's nanometer department in industrialization at present, producing technology and app -lying researching of super-fine calcium carbonate are absorbing broad attention of all over the world . The article has briefly introduced the developing matters of the world calcium carbonate industry, the present matter and the existing problems of calcium carbonate producing technology in our country, and the difference between our country and the world preceding level.In the base of producing practices, the article has summarized the producing technology and the characters of high concentration CO₂ to produce super-fine calcium carbonate and their advantage conditions and their shortages in contrast with traditional producing ways. In the all over the foundations, the article has expounded the new technology to produce super-fine calcium carbonate of continuous bubbling carbonizing way.The new technology has chosen three phases series bubbling towers to produce super-fine calcium carbonate, its liquid and solid materials getting into the three towers from their top to bottom by flowing, and its gas material getting into the three towers from their bottom to top by contrary style .Its gas phase is a scattering phase, and its liquid is a react phase and flowing phase. The carbonizing towers can be considered a like-even pushing flow reactor. In the fact, this is a complete new tech-nology to produce super-fine calcium carbonate.The article uses "the Double-film Theory" and "Chemical Reaction Engineering Analysis" way to study the dynamic areas, crystal principle and its' carbonized mechanics of all terms high concentration CO₂ to produce super-fine calcium carbonate. From this, the article has improved the chemical reaction theoretical foundation of carbonizing reaction; and has firstly definite expounded that carbonizing reaction process is a four phases reacting process; in the meantime, the article has deeply analyzed and calculated the technical conditions and materials balance and energies balance of the whole producing process, and studied the reason of the parceling phenomenon in carbonizing reaction process, and expounded some practical proposals to resolve the phenomenon.In a word, the article has invented and advocated a new field of producing research to produce super-fine calcium carbonate, and has enriched and developed the producing methods about super-fine calcium carbonate in our country.