Why can't the existing waste treatment process in cement plants produce high-quality sand and gravel aggregates?

At present, the country vigorously promotes the reuse of solid waste resources. In addition to the shortage of resources in the sand and gravel industry, more and more companies in the cement industry have begun to turn their attention to "using the stripped waste rock (useless limestone) on the cement production line of cement plants to make sand. Stone aggregates create higher corporate profits.

Solid waste recycling, reducing pollution and saving resources, is indeed a good intention, but it should be noted that the current production process of many cement plants has problems and is not suitable for the production of high-quality aggregates. why would you said this?

The aggregate industry has a consensus that truly good aggregates are "broken" rather than "broken", so as to minimize cracks and maintain high strength of the aggregate. In the cement industry, the craftsmanship emphasizes "more breaking and less grinding", that is, strong breaking is used to produce more cracks in the material to facilitate grinding, and these cracks are precisely related to the compressive strength and crushing of the aggregate. Value, bringing great hidden dangers to downstream production and construction safety.

How to configure the high-quality gravel aggregate line?

The production process of high-quality aggregates usually consists of first crushing, medium crushing, fine crushing, and shaping sand (if there is a demand for sand production). At this stage, most cement plants use ore waste to produce sand and gravel aggregates, and most of them continue to use the original equipment and technology of the cement plant-the entire process is completed by hammering, or some enterprises adopt traditional methods in the medium and fine crushing stage. The spring cone crusher is completed, and the use of these two equipment does not meet the requirements of high-quality aggregate. Why?

The core of the working principle of hammer crushing and traditional spring cone crushing is "broken". As we mentioned earlier, "more broken" means more "cracks". Therefore, the excellent technological design of modern high-quality sand and gravel aggregates is to give priority to recommending jaw crushers for coarse crushing, single-cylinder cone crushing for medium crushing, multi-cylinder cone crushing for fine crushing, impact crushing for sand making and shaping, and in soft rock crushing. , You can also consider using counter-attack crusher instead of cone crusher to avoid aggregate cracks and improve the quality of sand and gravel aggregates.

The grain shape of the finished product produced by hammer crushing and traditional spring cone crusher does not meet the requirements of modern high-quality sand and gravel aggregates. In order to meet the material standards for high-quality sand and gravel aggregates, most modern professional sand and gravel aggregate manufacturers use professional sand making machines to perform sand making and shaping operations, such as the widely used vertical shaft impact crusher in the market.