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Method for recycling dust generated by casting waste sand regeneration

A technology of foundry waste sand and dust, which is applied in the field of recycling dust generated in the recycling industry of foundry waste sand, and in the field of dust regeneration and utilization in the regeneration of foundry waste sand. problems, to achieve the effect of good chemical stability, light bulk density and high strength

Inactive Publication Date: 2019-04-19
广西兰科资源再生利用有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, various recycling technologies for foundry waste sand have been industrialized, but the dust recycling technology for recycling foundry waste sand is still blank; although the current national waste sand recycling is only about 10%, the amount of dust emitted from foundry waste sand regeneration is 25% More than 10,000 tons / year, with the application of foundry waste sand recycling technology more and more widely, the dust emission of foundry waste sand recycling is also increasing, which will also cause serious pollution to the environment, so the full recycling of foundry waste sand is realized Utilization is an Inevitable Requirement for the Sustainable Development of Foundry Industry

Method used

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  • Method for recycling dust generated by casting waste sand regeneration

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Embodiment 1

[0025] A method for recycling the dust produced by the regeneration of foundry waste sand. First, the dust removal system is used to collect high-value dust and low-value dust in groups according to the effective value of the dust; Activation, drying, crushing to produce composite powder for modeling, low-value dust and blast furnace slag and sludge produced by wet regeneration of foundry waste sand, after raw material pretreatment, batching, molding, pre-calcination, roasting, cooling, screening to produce light Ceramsite; the high-value dust is the dust generated during the regeneration process of uncalcined foundry waste sand, and the low-value dust is the dust generated during the regeneration process of the roasted foundry waste sand;

[0026] The structure of the powder classifier includes a classifier, a cyclone separator, and a diversion chamber; the upper part of the classifier is provided with a feed port, the lower part is provided with a large particle discharge por...

Embodiment 2

[0037] Compared with Example 1, the number of cyclone separators is 6, and the blowing pressure of the dust cleaning system is 0.55MPa, and the blowing time is 0.1s. Other operations are the same as in Example 1.

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Abstract

The invention discloses a method for recycling dust generated by casting waste sand regeneration. According to the method, firstly, a dust removal system is used for collecting high-value dust and low-value dust in groups according to effective values of the dust; then composite powder for modeling is generated through compounding, activation, drying and pulverizing after the high-value dust is sieved by a powder concentrator, and sludge generated through wet regeneration by the low-value dust, blast furnace slag and casting waste sand is subjected to raw material pretreatment, compounding, shaping, prebaking, baking, cooling and screening to generate light ceramsites; the high-value dust is dust generated during regeneration of unbaked casting waste sand, and the low-value dust is dust generated during regeneration of baked casting waste sand. The recycling method can achieve the purpose of full recycling of the casting waste sand, and has the advantages that the operation is simple,more energy is saved, and the environment is protected better.

Description

technical field [0001] The invention belongs to the technical field of material roasting recovery and reuse, and in particular relates to a method for recycling dust generated from the regeneration of foundry waste sand, which is a method for recycling the dust generated in the recycling industry of foundry waste sand. Background technique [0002] Casting is the foundation of the manufacturing industry and the main means of providing blanks for the machinery industry. The weight of castings accounts for 48% to 80% of the total weight of the machine. Many castings are also the core components of the machine, such as engines and machine tools. The level of castings directly determines the level of mechanical equipment and its core components, and it is well known that the development of various industries is inseparable from castings, so casting plays a pivotal role in the national economy. However, casting is a resource-intensive industry, which consumes a lot of energy and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/138
CPCC04B33/138C04B38/009Y02P40/60
Inventor 戴伟平罗桂猛刘临琦梁炎
Owner 广西兰科资源再生利用有限公司
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