Waste sand recycling equipment and use method thereof

Abstract

The invention relates to waste sand recycling equipment which comprises a vibration crushing screening machine, an old sand lifting machine, a magnetic separation machine, a hot-method regeneration device, a cooling bed, a vibration screen and a new sand lifting machine which are connected in sequence. A use method of the waste sand recycling equipment comprises the following steps of: a, adding waste sand into the vibration crushing screening machine, crushing the waste sand into small particles, feeding the small particles into the old sand lifting machine, conveying the small particles to the magnetic separation machine, and removing iron materials; b, feeding preheated waste sand into the hot-method regeneration device for sintering; c, cooling the high-temperature sintered sand through the cooling bed, feeding the cooled sintered sand into the vibration screen, and enabling the sintered sand to pass through the new sand lifting machine to obtain regenerated sand; d, preparing materials according to the following formula: 1.6-1.7kg of a methenamine solution, 2.7-2.8kg of phenolic resin, 100-300g of calcium stearate, 60-100g of silane and 150kg of the regenerated sand and / or raw sand; e, adding the materials into a stirring kettle in sequence and uniformly stirring to obtain precoated sand. The waste sand recycling equipment has the beneficial effects of simplicity for operation, high old sand recycling rate and simplicity for popularization.

Description

technical field [0001] The invention relates to waste sand recycling equipment and a using method thereof. Background technique [0002] my country is a big foundry country. With the rapid development of the national economy, the annual output of castings in my country has reached 35.3 million tons by 2009, ranking first in the world's casting output. my country is also a country that consumes a lot of molding materials, because more than 80% of the castings come from sand casting. Since the sand and iron are relatively large in the molding of our country, generally speaking, about 1.2 to 1.4 tons of waste sand can be produced for every ton of qualified castings produced. The discharge of foundry waste sand can reach more than 30 million tons. Such a large discharge of foundry waste sand will surely occupy a lot of waste sand sites. With the wide application of various organic and inorganic binders in our country, more and more harmful components are contained in waste sand...

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Problems solved by technology

Such a large discharge of foundry waste sand will surely occupy a lot of waste sand sites

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