A kind of dedusting ash ceramsite sand and its preparation method and application

Abstract

The invention discloses ceramsite sand with dedusting ash as well as a preparation method and application thereof. The ceramsite sand is prepared from the following components in parts by weight: 70-80 parts of fly ash, 10-15 parts of cement, 1-5 parts of VAE glue powder and 1-5 parts of silicon ash. The ceramsite sand with dedusting ash replaces conventional sand to prepare coated sand; firstly,the ceramsite sand with dedusting ash is small in stacking density, good in angular coefficient and large in specific surface area under the equivalent weight condition; the consumption of adhesive inpreparation of the coated sand is low; a better coating effect is achieved in the process of preparing the coated sand; mullite is taken as a main crystal phase of the prepared ceramsite sand; the ceramsite sand has extremely high resistance to high temperature and good thermal stability; the size accuracy of castings can be ensured; the preparation method of the ceramsite sand with dedusting ashis simple; a large amount of energy does not need to be consumed in the preparation process; compared with other common raw sand of the coated sand, the ceramsite sand with dedusting ash is low in cost.

Description

technical field [0001] The invention belongs to the technical field of foundry industry, and in particular relates to dust-removing ash ceramsite sand and its preparation method and application. Background technique [0002] Casting refers to the processing method of melting solid metal into liquid and pouring it into a mold of a specific shape, and waiting for it to solidify and form. The metals to be cast include copper, iron, aluminum, tin, lead, etc., and the materials of ordinary molds are raw sand and clay. , water glass, resin and other auxiliary materials. In the casting production process, the aggregate and main component of the mold are silica sand. At present, the sand used for coated sand is mainly quartz sand, non-quartz sand, artificial sand, etc. Among them, quartz sand is mainly ordinary silica sand, non-quartz sand is divided into magnesia, olivine sand, chromite sand, zircon sand, etc., artificial sand is divided into artificial composite sand, enstatite s...

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of my country's foundry industry, the requirements for casting materials are getting higher and higher, and the shortcomings of traditional coated sand casting sand have become more and more prominent. Quartz silica sand has low refractoriness, large thermal expansion, and angular shape. The shortcomings of large coefficient and poor fluidity cause defects such as sand sticking, veining, deformation and cracking in castings

Non-quartz sand is divided into magnesia, olivine sand, chromite sand, zircon sand, etc. Although the comprehensive performance is high, the resources are scarce and expensive

At the same time, due to mechanical crushing in the production process, the angle coefficient is large, and the strength is low under the same resin amount. Although the manufacturing process of artificial composite sand is simple, the metallurgical composition of the casting is easily changed due to the messy chemical composition, resulting in the appearance of the casting. Quality problems, when in the high temperature environment during casting, the advantage is not obvious

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