It is a priority activity and gel type. Because it determines the strength of cement bricks, durability, cement consumption and cost, the greatest impact on the product. In the case of a variety of conditions to be considered, you should first select the gel with good activity and waste, and then consider other aspects.

     Second, consider the waste density. Cement tiles to light for the gifted, so try to take care of the activity on the basis of consideration to the cement brick density requirements for raw materials, select those with relatively low density of the waste. Density should be secondary considerations.

     Side effects should be considered waste. In the case of active densities are appropriate, we must take into account the adverse effects of waste, and to avoid the effects of the strength of cement bricks, quality. For example, active chromium slag density is not too high, but it is particularly toxic, detoxification if no measures are not optional original chromium.

     Chen should consider the application of the waste. Too costly investment is too high, it is not very suitable for brick, the former three are guaranteed of the case, the cost as low as possible, do not spend money you can get.

     Should consider the situation of supply and resource waste.

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