Waste foundry sand regenerating process method

A process method and technology of casting waste sand, which is applied in the field of metal casting, can solve the problems of high energy consumption, emission of toxic and harmful waste gas, etc., and achieve the effect of reducing roasting energy consumption

Inactive Publication Date: 2011-04-13
LIUZHOU AOKAI ENG MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a casting waste sand regeneration process, which can solve the proble

Method used

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  • Waste foundry sand regenerating process method
  • Waste foundry sand regenerating process method
  • Waste foundry sand regenerating process method

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with accompanying drawing example:

[0020] figure 1 The shown foundry waste sand regeneration process includes the following procedures:

[0021] 1. Crushing and screening: first crush the waste sand in block form, and then use a sieve to separate and remove large impurities;

[0022] 2. Magnetic separation: The waste sand that has been sieved with large impurities is subjected to magnetic separation, and the ferromagnetic substances are separated and removed from the waste sand;

[0023] 3. Roasting: Send the waste sand after magnetic separation into the roaster for roasting, burn the remaining organic matter, and discharge it into the air after dust removal by induced wind;

[0024] 4. Classification and screening: Classify and screen the treated sand obtained after roasting and cooling to obtain regenerated sand of different thickness levels required by the casting process.

[0025] Th...

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Abstract

The invention discloses a waste foundry sand regenerating process method, which comprises the processes of crashing and screening, magnetic separation, roasting and graded screening. The roasting process particular comprises the following steps of: preheating waste sand which does not enter a furnace and air for combustion by using the heat of hot sand which is discharged from the furnace; controlling the roasting temperature of a roasting furnace to be between 780 and 850 DEG C by controlling a roasting furnace burner and the flow of the waste sand entering the furnace; separating roasted waste sand from waste gas by using a cyclone dust collector, a spraying dust collector and a bag type dust collector; and exhausting the separated waste gas to the atmosphere after passing through an alkali liquor washing tank and an adsorption tank, wherein the bag type dust collector has a high-pressure air flow blowback control bag dust-removing structure; and the dust-removing process and the normal operation of a system are maintained by controlling the bag dust-removing cycle of the bag type dust collector. Compared with the conventional method, the waste foundry sand regenerating process method has the advantages of greatly reducing energy consumption and guaranteeing the cleaness of the exhausted waste gas.

Description

technical field [0001] The invention belongs to the technical field of metal casting, in particular to a process method for regenerating waste resin sand produced in the metal casting process. Background technique [0002] my country is a big foundry country in the world. Every year, a large amount of unusable resin waste sand is produced due to foundry production. For the treatment of resin waste sand, one is discarded, and the other is recycled and continued to be used in the foundry process. One of the existing foundry waste sand regeneration process methods includes the following steps: [0003] 1. Crushing and screening: crush the waste sand in the form of blocks, and then screen to separate and remove impurities; [0004] 2. Magnetic separation: magnetically separate the screened waste sand to separate and remove ferromagnetic substances from the waste sand; [0005] 3. Roasting: Send the waste sand after magnetic separation into the roaster for roasting, burn the re...

Claims

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Application Information

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IPC IPC(8): B22C5/00
Inventor 秦勇
Owner LIUZHOU AOKAI ENG MACHINERY
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