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Method for recycling old ceramsite sand, regenerated ceramsite sand and its products

A technology for the regeneration of used sand and ceramsite sand, which is applied to the regeneration method of used ceramsite sand, the field of recycled ceramsite sand and its products, can solve the problems of high energy consumption, low treatment efficiency, poor primary regeneration effect, etc. The effect of consumption value and ignition loss, improving processing efficiency and shortening process time

Active Publication Date: 2020-06-02
南阳仁创砂业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment methods for old ceramsite sand are concentrated on thermal treatment or mechanical grinding. Most of them are combined regeneration of thermal treatment and mechanical grinding. The effect is poor, and because the texture of ceramsite sand itself is relatively brittle, it is often not suitable for the grinding process. The wet regeneration equipment is huge, consumes high energy, and there are also problems of low processing efficiency, low regeneration rate or poor quality of recycled sand, and the cost higher

Method used

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  • Method for recycling old ceramsite sand, regenerated ceramsite sand and its products
  • Method for recycling old ceramsite sand, regenerated ceramsite sand and its products
  • Method for recycling old ceramsite sand, regenerated ceramsite sand and its products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] A method for recycling old ceramsite sand, comprising the steps of:

[0095] Take 1 ton of broken ceramsite old sand mold, the particles are in 30-100 mesh.

[0096] Roasting treatment: fill 1 ton of broken ceramsite old sand molds into the roasting furnace, disperse the broken ceramsite old sand molds into the furnace from the top of the furnace, and carry out a roasting in the fluidized layer of the roasting furnace at 200°C for 1 hour, and then drop to In the counter-flow heat exchanger at the bottom of the furnace, the second roasting is carried out at a roasting temperature of 700°C until the pressure in the furnace is 400Pa; then continue to descend to the bottom of the roasting furnace, and slowly cool down at 10°C / min until the temperature drops to 400 °C, discharged from the roasting device to obtain roasted products.

[0097] Pickling: Mix and stir the roasted product and 2.18% hydrochloric acid solution in a stirring tank for 10 minutes, and separate the sol...

Embodiment 2

[0104] A method for recycling old ceramsite sand, comprising the steps of:

[0105] Take 3 tons of broken ceramsite old sand mold, the particles are in 100-200 mesh.

[0106] Roasting treatment: Fill 3 tons of broken ceramsite old sand molds into the roasting furnace, disperse the broken ceramsite old sand molds from the top of the furnace into the furnace, and perform a roasting in the fluidized layer of the roasting furnace at 100°C for 2 hours, and then drop to In the counter-flow heat exchanger at the bottom of the furnace, the second roasting is carried out, the roasting temperature is 800°C and the pressure in the furnace is 550Pa; then continue to descend to the bottom of the furnace, and slowly cool down at 15°C / min until the temperature drops to 450°C , discharged from the roasting device to obtain roasted products.

[0107] Pickling: Mix and stir the roasted product and 3% hydrochloric acid solution in a stirring tank for 5 minutes, and separate the solid to obtain ...

Embodiment 3

[0110] The only difference between Example 3 and Example 1 is that the primary firing temperature is 100°C.

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Abstract

The invention provides a regeneration method of ceramsite used sand, regenerated ceramsite sand and products of the regenerated ceramsite sand, and relates to the technical field of foundry waste sandregeneration. The regeneration method of the ceramsite used sand comprises the following steps that broken ceramsite used sand molds are sequentially subjected to roasting, pickling and physically removing of impurities to obtain the regenerated ceramsite sand; and the mesh of the broken ceramsite used sand molds is 30-200 mesh. The regeneration method of the ceramsite used sand solves the technical problem of lacking of a regeneration method of the ceramsite used sand in the prior art which uses the ceramsite used sand to recover and regenerate the higher-quality regenerated ceramsite sand and has a high regeneration rate. The regenerated ceramsite sand and the products of the ceramsite used sand are obtained through recycle and regeneration by using the regeneration method of the ceramsite used sand.

Description

technical field [0001] The invention relates to the technical field of regeneration of foundry waste sand, in particular to a regeneration method for old ceramsite sand, regenerated ceramsite sand and products thereof. Background technique [0002] Casting production is to heat and melt metal to make it fluid, and then pour it into a mold cavity with a certain shape, fill the cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.), cool and A method of metal forming that solidifies into a casting (or part). Sand casting refers to the casting method that produces castings in sand molds. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Ceramsite sand is the modeling material used in sand casting. [0003] Ceramsite sand can be made into sand core and shell core to form the internal cavity or local shape of the casting. During the casting process, the surface of the sand core and shell c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C5/00B22C5/06
CPCB22C5/00B22C5/06
Inventor 李卓情尹海军冯俊龙刘承翔秦申二
Owner 南阳仁创砂业科技有限公司
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