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Regeneration method for reducing ignition loss of water-washing casting ceramsite sand

A technology of ceramsite sand and ignition loss, which is applied to casting molding equipment, cleaning/processing machinery of casting mold materials, manufacturing tools, etc., can solve the problems of high energy consumption, poor drying uniformity, etc., and achieve high removal rate , reduce energy consumption, reduce the effect of burning loss

Pending Publication Date: 2022-03-04
南阳仁创再生资源有限公司
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Problems solved by technology

However, this method consumes a lot of energy and has poor drying uniformity.

Method used

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  • Regeneration method for reducing ignition loss of water-washing casting ceramsite sand

Examples

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Embodiment

[0038] Change the reaction conditions in Examples and Comparative Examples, see Table 1 for specific settings.

[0039] Table 1 embodiment and comparative example setting

[0040] Example Reaction conditions Example 1 The ceramsite sand is washed in the first stage, dehydrated in the first stage, and dried at 500 °C without wind. Example 2 The ceramsite sand is sequentially washed in two stages, dehydrated in the first stage, and dried at 500°C without wind. Example 3 The ceramsite sand is sequentially washed in two stages, dehydrated in two stages, and dried at 500°C without wind. Example 4 The ceramsite sand is sequentially washed in two stages, dehydrated in two stages, and dried at 200°C without wind. Example 5 The ceramsite sand is sequentially washed in two stages, dehydrated in the first stage, and dried at 200°C without wind. Example 6 The ceramsite sand is sequentially washed in two stages, dehydrated in two stages, a...

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Abstract

According to the regeneration method for reducing the ignition loss of the washing casting ceramsite sand, the used ceramsite sand is sequentially washed, dewatered and dried, the ignition loss of ceramsite regenerated sand can be reduced, the removal rate of residual substances on the surface of the ceramsite regenerated sand is high, and energy consumption is reduced on the premise that the performance is enhanced. Solidified impurities difficult to remove on the surface of the ceramsite sand can be removed through two-stage washing, sand washing sewage is adopted in first-stage washing, clear water is adopted in second-stage washing, and clear water consumption and residual impurities on the surface of the ceramsite sand in the sand washing process are reduced. The two-stage dehydration comprises the step of sequentially using a dehydration screen and a water control device with pressure difference, so that the water content of the ceramsite sand can be reduced to be less than 3%, and the removal of residual water in the next step of drying is facilitated. Wind power and thermal power are combined through dynamic drying, the wind power acts heat on pore positions of ceramsite sand, so that the thermal power is fully utilized, energy consumption is reduced, and the ignition loss of the ceramsite sand is reduced.

Description

technical field [0001] The invention relates to the technical field of resource recovery, in particular to a regeneration method for reducing the loss on ignition of water-washed cast ceramsite. Background technique [0002] Ceramsite sand has been widely used in the field of casting because of its good angular shape coefficient and excellent high temperature performance. As a high-efficiency special sand, the application of ceramsite sand in the foundry field has a significant role in promoting casting. Therefore, the recycling of ceramsite sand is not only a cost reduction, but also a protection of the environment. [0003] Wet regeneration of ceramsite sand can obtain recycled sand products with high regeneration rate and reuse rate. However, because ceramsite sand has many fine pore structures and strong surface adsorption capacity, water and impurities in water will remain in these pores after washing, and it is difficult to remove them by low-temperature roasting. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C5/00B22C5/08
CPCB22C5/00B22C5/08
Inventor 冯俊龙尹海军唐品包羽冲
Owner 南阳仁创再生资源有限公司
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