Preparation method of foaming agent for use in burning of refractory brick

Abstract

The invention discloses a preparation method of a foaming agent for use in burning of a refractory brick. The preparation method comprises the following steps of: proportionally mixing water with caustic soda, heating in a water-insulated way, grinding rosin of required weight into particles of less than or equal to 5 millimeters in diameter, putting into a caustic soda solution, continually heating in a water-insulated way, and boiling into a milky-white blocky rosin soap; cooling the rosin soap, putting into strong brine for soaking, and rinsing with clear water; and proportionally mixing water with bone glue, heating into a bone glue solution, heating the bone glue solution and the rinsed rosin soap together in the weight ratio of 1:0.25-1:0.35, and fully dissolving the rosin soap to obtain the foaming agent for use in burning of the refractory brick. In the preparation method disclosed by the invention, the weight ratios of water to caustic soda and water to rosin are controlled strictly, and rosin is ground into small-diameter particles, so that a saponification reaction is performed completely, and the uniformity of a final foaming agent is enhanced. The weight ratio of the bone glue solution to the rosin soap is controlled, so that the viscosity of the foaming agent is increased, and the foam stability is further enhanced.

Description

technical field [0001] The invention relates to a preparation method of a foaming agent, in particular to a preparation method of a foaming agent used in the process of firing refractory bricks. Background technique [0002] Refractory bricks are mainly used in the heat insulation layer of industrial kilns. The heat insulation layer is generally made of refractory fibers such as cotton, board, felt and light heat insulating refractory bricks to form a mixed layer with low thermal conductivity and low density. However, in the high temperature environment of the kiln, the mixed layer has different expansion coefficients between the refractory fiber and the refractory bricks. During the process of starting and stopping the kiln, the shrinkage and expansion rates of various materials are different, which may easily lead to the peeling of the heat insulation layer. , affecting overall performance. Therefore, a refractory brick with capillary pores is widely used now, which has t...

AI Technical Summary

Problems solved by technology

However, since the density of these fillers is difficult to approach the density of the mud used to fire refractory bricks, the fillers tend to concentrate more on the upper part of the mud, resulting in uneven density of refractory bricks, or the particle size of the filler itself varies greatly, resulting in refractory bricks. The difference in the size of the inner pores leads to a difference in density, which affects the thermal insulation performance of refractory bricks