Foundry used sand wet intermittent regeneration method and equipment thereof

An intermittent, used sand technology, applied in casting and molding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of complex structure, complex process, and narrow use surface of regeneration equipment, and achieve simple structure, high quality, and water consumption. small effect

Active Publication Date: 2012-08-01
包头市晟裕机械制造有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention proposes a wet-process intermittent regeneration method for old foundry sand, which solves the problems of the existing wet-process regeneration method of used foundry sand, which are complex in process and narrow in use area;

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  • Foundry used sand wet intermittent regeneration method and equipment thereof
  • Foundry used sand wet intermittent regeneration method and equipment thereof
  • Foundry used sand wet intermittent regeneration method and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: be used for neutral clay old sand regeneration, comprise the steps:

[0039] (1) One-time scrubbing step: according to the mass ratio of 1:0.5, add old sand and clean water into the scrubbing cylinder respectively for stirring and scrubbing, stirring and scrubbing for 30 seconds, and then discharge the sewage in the scrubbing cylinder;

[0040] (2) Second scrubbing step: inject clean water into the scrubbing cylinder again, the mass ratio of old sand and clean water in the scrubbing cylinder is 1:0.5, perform agitation and scrubbing for 30 seconds, and then discharge the sewage in the scrubbing cylinder;

[0041] (3) Three scrubbing steps: inject clean water into the scrubbing cylinder for the third time, the mass ratio of the old sand and clean water in the scrubbing cylinder is 1:0.5, stir and scrub for 30 seconds, and then discharge the sand-water mixture in the scrubbing cylinder into the sand Water separation equipment for separation;

[0042] (4) In...

Embodiment 2

[0044] Embodiment 2: be used for neutral clay old sand regeneration, comprise the steps:

[0045] (1) One-time scrubbing step: according to the mass ratio of 1:3, add old sand and clean water into the scrubbing cylinder respectively for stirring and scrubbing, stirring and scrubbing for 300 seconds, and then discharge the sewage in the scrubbing cylinder;

[0046] (2) Second scrubbing step: inject clean water into the scrubbing cylinder again, the mass ratio of old sand and clean water in the scrubbing cylinder is 1:3, perform stirring and scrubbing, and the stirring and scrubbing time is 300 seconds, and then discharge the sewage in the scrubbing cylinder;

[0047] (3) Three scrubbing steps: inject clean water into the scrubbing cylinder for the third time, the mass ratio of the old sand and clean water in the scrubbing cylinder is 1:3, perform agitation and scrubbing, the stirring and scrubbing time is 300 seconds, and then discharge the sand-water mixture in the scrubbing cy...

Embodiment 3

[0050] Embodiment 3: be used for the old sand regeneration of alkaline water glass, comprise the steps:

[0051] (1) One-time scrubbing step: according to the mass ratio of 1:0.5, add the old sand and clean water into the scrubbing cylinder respectively for stirring for 30 seconds, and then discharge the sewage in the scrubbing cylinder;

[0052] (2) Second scrubbing step: inject clear water into the scrubbing cylinder again, the mass ratio of old sand and clean water in the scrubbing cylinder is 1:0.5, and add hydrochloric acid, stir for 30 seconds, and then discharge the sewage in the scrubbing cylinder; When the concentration of hydrochloric acid is 37.5% by mass, the amount added is 0.8ml hydrochloric acid per kg of old sand;

[0053] (3) Three scrubbing steps: inject clean water into the scrubbing cylinder for the third time, the mass ratio of old sand and clean water in the scrubbing cylinder is 1:0.5, stir for 30 seconds, and then discharge the sand-water mixture in the...

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Abstract

A foundry used sand wet intermittent regeneration method and equipment thereof belong to a foundry used sand regeneration method and equipment thereof, aim to solve the problem of complicated process and narrow application scope of the conventional foundry used sand wet regeneration method, and further solve the problem of relatively complicated structure of the conventional regeneration equipment. The regeneration method comprises a scrubbing step, a second scrubbing step, a third scrubbing step and a checking step. The regeneration equipment comprises a stirrer and a sand-water separation device, wherein the stirrer comprises a support frame, a scrubbing cylinder, a drive cylinder, a motor and a main shaft, and the scrubbing cylinder is provided with a sand inlet and a water inlet and further provided with a water drainage valve and a sand discharge valve. By integrating the combined actions of mechanical stirring, water washing and acid cleaning, the regeneration method provided bythe invention has the advantages of convenience in control, low water consumption, high residual adhesive removal ratio and good sand regeneration quality; the regeneration equipment has the advantages of simple structure, low energy consumption, convenience in control and good sand regeneration quality; and the regeneration method and equipment are suitable for large-scale wet regeneration of used clay sand, used water glass sand and used alkaline phenolic resin sand.

Description

technical field [0001] The invention belongs to a method and equipment for regenerating old foundry sand, in particular to a wet-process intermittent regenerated method for used foundry sand and its device. Background technique [0002] Foundry old sand regeneration refers to breaking the used old sand and removing the residual binder film and sundries wrapped on the waste sand, so as to restore the physical and chemical properties close to the new sand, so as to replace the new sand. [0003] At present, there are three main methods of recycling used foundry sand: [0004] The first method is dry regeneration. There are various forms of dry regeneration of old sand, including mechanical, airflow, vibration, etc., but in terms of regeneration mechanism, they are all "collision and friction" processes. When the force generated in the collision friction is greater than the yield strength of the residual adhesive film on the old sand grains or the bonding strength between the...

Claims

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Application Information

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IPC IPC(8): B22C5/00B22C5/04
Inventor 樊自田龙威刘富初李雪洁宗晓明
Owner 包头市晟裕机械制造有限责任公司
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