Energy-saving non-oriented silicon steel coating liquid, and preparation method and application thereof

Abstract

The invention discloses an energy-saving non-oriented silicon steel coating liquid, and a preparation method and an application thereof. The coating liquid is a semiorganic-semiinorganic silicon steelsheet coating liquid and comprises an inorganic component, an epoxy acrylate composite emulsion, a silane polymer, polyhydric alcohol and a defoaming agent according to a mass ratio of (6-22):1:(0.1-1.0):(0.1-1.0):(0.01-0.05); and the inorganic component comprises, by mass, 15-30 parts of silica sol, 14-28 parts of aluminum dihydrogen phosphate, 10-20 parts of chromium dihydrogen phosphate, 0.1-0.8 part of boric acid and 40-100 parts of water. A coating layer formed by the coating liquid has the advantages of good corrosion resistance, good adhesion, good glossiness, good hardness and uniformfilm forming quality, and reduces the temperature of a drying furnace by 150-200 DEG C under the same plate passing speed of similar continuous annealing units, and the preparation method has the advantages of great reduction of the combustion load and the energy consumption of the drying furnace, and great reduction of the consumption of unit devices and spare parts.

Description

technical field [0001] The invention relates to the technical field of silicon steel insulating coatings, in particular to an energy-saving coating solution for non-oriented silicon steel and its preparation method and application. Background technique [0002] Cold-rolled non-oriented silicon steel is an important soft magnetic alloy material. It is mainly used to make iron cores of rotating electrical machines such as motors and generators. In the process of making iron cores, silicon steel sheets need to be stamped and stacked together for use. The manufactured motor operates in an alternating magnetic field with a certain operating frequency, so eddy current loss will occur between the laminations of the iron core, and the insulating coating on the surface of the silicon steel sheet is to minimize this energy loss. This insulating coating not only needs to have good insulation, but also has good punchability, adhesion and corrosion resistance. [0003] Non-oriented sili...

AI Technical Summary

Problems solved by technology

However, the above-mentioned coating patents and existing coating technologies can only be dealt with by increasing the power of the radiant tube of the drying furnace or greatly increasing the furnace section length of the coating drying furnace under the conditions of the existing drying furnace equipment.

This undoubtedly puts forward higher requirements on the energy consumption of the unit and the quality of equipment spare parts, especially the long-term operation of the radiant tube burner under the ultra-high load state, and the refractory bricks in the furnace are easy to burn and break

At present, there are no published patents on the market to reduce the drying temperature of the coating and reduce energy consumption through the adjustment of the coating liquid formula and the coating process, and it is difficult to meet the individual needs of users.

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