Preparation method and equipment of a concrete internal curing material

Abstract

The invention belongs to the field of building materials and particularly relates to a preparation method and equipment of a concrete internal curing material. According to the method, integrated design of drying and powder preparation is adopted, the concrete internal curing material is prepared from alkaline residues, and the problem of long preparation cycle of powder is solved. The equipment comprises a base, a box, a wet material inlet, an air inlet, an air outlet, a dry material outlet, a drainage pipe, infrared radiators, a flying knife pulverizer and two stages of transmission devices,wherein the wet material inlet is connected with the first-stage transmission device, the tail end of the first-stage transmission device is connected with a feeding hopper of the flying knife pulverizer, and a discharging hopper of the flying knife pulverizer is connected with the second-stage transmission device; the infrared radiators are arranged above the two stages of transmission devices and used for drying a wet material and powder. The pore structure in the chlorine-alkali residues can be reserved to the greatest extent by use of flying knife pulverization, additional blending of mixed materials is not required, and the problem of ball adhesion caused by conventional pulverization equipment is solved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a preparation method and equipment for concrete internal curing materials. Background technique [0002] Soda slag is the waste residue produced by ammonia-soda method to produce soda ash. my country is currently the largest producer of soda ash in the world. The soda slag produced by the production of soda ash is as high as 3 million tons every year. Such a large amount of soda slag has caused many environmental pollution problems. However, the content of chloride ions in the alkali slag is extremely high, and the mass fraction of ions in the dry state can reach 10%, which makes the secondary utilization of the alkali slag very difficult. At present, the utilization rate of alkali slag in our country is only 3-4%, and the main treatment methods are stockpiling or reclamation, which has brought problems such as the "white sea" phenomenon to the environment. [0003...

AI Technical Summary

Problems solved by technology

[0005] When the applicant conducted laboratory research in the early stage, the alkali slag was dechlorinated first, then dried in an oven, and then powdered. The whole experiment cycle was long, which affected the progress of subsequent experiments. It is urgent to develop a new method that can quickly prepare alkali slag. Equipment and method for internal curing agent powder

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