Special binder for unfired refractory brick masonry of inside liner of rotary kiln

Abstract

The invention discloses a special binder for unfired refractory brick masonry of an inside liner of a rotary kiln. The special binder comprises the following raw materials in parts by weight: (1) 1-5 parts of fluorite of 0.8-1mm, (2) 10-25 parts of floating bead of 0.425-0.633mm, (3) 10-15 parts of sub-white fused alumina of 0.8-1mm, (4) 4-6.5 parts of mullite of 0.088mm, (5) 25-30 parts of clay powder of 0.425-0.633mm, and (6) 15-18 parts of silica fume of 0.85-1mm. A preparation method comprises the following steps of: 1) preparing the raw materials of the special binder for unfired refractory brick masonry into the required specifications respectively to obtain a prepared material; and 2) sufficiently mixing the prepared material obtained by the step 1), and packing to obtain the special binder for unfired refractory brick masonry. The special binder disclosed by the invention has the beneficial effects of strong caking property, high anti-peeling strength, oxidation resistance, erosion resistance and good wear resistance, is convenient to construct, and reduces the labor intensity of workers and the construction conditions.

Description

Technical field [0001] The invention relates to a special fire-free refractory brick used for building a calcining rotary kiln lining thermal insulation layer, belonging to the field of special binders for refractory brick masonry. Background technique [0002] The working area of ​​the rotary kiln can be divided into three sections, namely the drying and preheating section, the calcination section and the cooling section. For example: cement, refractory materials, fracturing proppant for oil wells, lime and other calcining rotary kilns. The function of the lining brick of the rotary kiln is to ensure that the temperature of the three working areas in the furnace has stable and reliable physical properties within the scope of the process requirements; for example, resistance to peeling, thermal shock, high load softness, and wear resistance. In the prior art, the lining brick of the rotary kiln is divided into a refractory layer and an insulation layer; the technical defects are...

AI Technical Summary

Problems solved by technology

In the prior art, the lining brick of the rotary kiln is divided into a refractory layer and an insulating layer; the existing technical defects are: the masonry process is complex, the refractory layer and the insulating layer are easy to separate during use, the refractory and insulating properties are poor, and the service life is short , the actual service life is 8-10 months

It leads to long maintenance time and high production cost, which obviously affects the economic benefits of the enterprise. The direct cause of the above defects lies in the use of masonry binders.