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由于烧结砖在使用时是大面积铺装，所以如果砖的色差太大的话会直接影响整体铺装的效果，以至于影响整体视觉美感。所以烧结砖成品的色差也必然成为衡量其质量优劣的重要指标之一。造成烧结砖成品色差过大的原因主要有以下几个原因：

Because the sintered brick is used in large area, if the color difference of the brick is too big, it will directly affect the effect of the whole paving, so that it affects the overall visual aesthetic feeling. Therefore, the chromatic aberration of fired brick will become an important index to evaluate its quality. The reasons for the excessive chromatic aberration of fired brick are mainly the following reasons.

 

 

1.选材与制作砖胚时材料的搅拌不均。

1. the material is not agitated when the brick embryo is selected and made.

 

 

2.砖坯在装窑车时码放不合理，稀疏不均匀造成火焰不能均匀加热所有砖坯，使砖坯在预热时加热不均，砖坯水分未能彻底排除就进入烧成带，造成部分砖出现黑心、红心现象。

The 2. brick is not reasonable when the kiln car is installed, and the sparsely uneven cause the flame can not heat all the bricks evenly, so that the brick is heated unevenly in the preheating, the brick water can not be completely eliminated into the burning zone, causing some bricks to appear black heart and red heart.

 

 

3.温度控制不好，由于现在的隧道窑大部分是采用煤气发生炉煤气作为燃料，但由于诸如煤质、煤气炉操作、烧制制品的不同等原因造成烧成温度波动太大，造成有些车位温度高有些温度低。

3. the temperature control is not good, because most of the tunnel kiln now uses gas producer gas as fuel, but the temperature fluctuates too much because of the coal quality, the operation of the gas furnace and the different burning products, which causes the temperature of some parking spaces to be high and some temperature is low.

 

 

4.排烟机拉力过大，使火焰无法到达窑炉顶部时就被拉力以水平方向拉出高温带，造成顶部和底部的温差太大，有时其温差可达50度。以至于有时下部制品粘连变形产生废品，而上部却仍然没有达到烧结温度。

The 4. smoke exhauster has too much tension to pull the flame out of the high temperature zone in a horizontal direction when the flame is unable to reach the top of the kiln. The temperature difference between the top and the bottom is too large, and the temperature difference is sometimes up to 50 degrees. So sometimes the lower part product is produced by adhesion deformation, but the upper part still does not reach the sintering temperature.