A kind of preparation method of modified limestone powder

Abstract

The invention provides a preparation method of modified limestone powder. The method comprises the following operation steps that (1) after big blocks of limestone are subjected to crushing treatment by a jaw type crushing machine, the limestone is sieved by a sieve being 20 to 30 meshes; (2) the sieved limestone is mixed with microcrystalline wax, then, an obtained mixture is conveyed to a material storage hopper by an elevator; next, the materials are uniformly, quantitatively and continuously conveyed into a host grinding chamber of an European style powder grinding machine to be ground through a vibration feeding machine; the ground limestone powder is blown up by wind and is graded by a powder selection machine; 325-mesh modified limestone powder is prepared. The preparation method of the modified limestone powder provided by the invention has the advantages that the operation is simple; the raw materials can be easily obtained; the manufacturing cost is low; the performance is stable; non-toxicity and harmlessness are realized; environment is protected; no pollution is caused; the preparation method is suitable for large-scale industrial production.

Description

technical field

[0001] The invention belongs to the technical field of limestone powder processing, and in particular relates to a preparation method of modified limestone powder. Background technique

[0002] Lime powder is a white powdery substance with calcium carbonate as the main component. Due to the large population of our country and the relatively large power consumption, the exhaust gas emitted by power plants has caused serious environmental pollution. Therefore, the power plants now use limestone powder desulfurization methods to remove sulfur dioxide in the exhaust gas and avoid environmental pollution. , The limestone powder used for desulfurization requires a particle size of 250 mesh or 325 mesh (45μm), and the desulfurization effect of 325 mesh limestone powder is better. However, the common limestone currently available on the market, although its particle size meets the requirements for use, its desulfurization effect still cannot meet the requirements, a...