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Walnut Shell Sandblasting

Walnut shell sanblasting is an organic abrasive commonly used to polish and clean soft metals, fiberglass, stone and wood. The material is used in situations where delicate blasting is required, so the substrate is not effected by the process. Walnut shell sandblasting can be applied to clean automotive parts, turbines, removal of graffiti and polishing light metals.

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Description

The walnut shell sandblasting is processed by degreasing, breaking, screening, etc. And it is granular, brownish as well as has many micro holes in the surface. In addition, walnut shell blasting can be used not only as a filter material with good absorption effect, but also as a blasting media which will not destroy the surface of the workpiece, have good polishing effect and other advantages.

Walnut sand use high quality pecan shell as raw material, then through strict screening and classification. Moreover, it is produced in accordance with industrial standards, and have advantages of uniform grain size, consistent shape, good durability, elasticity, polishing and grinding effect.

Product Specification

Fiber	90.40%
Oil	0.40%
Water	8.70%
Mohs Hardness	2.5-3.0
Specific Gravity	1.28
PH	4~6
Real Density	3.86g/cm³
Bulk Density	2.36kg/L

walnut shell sandblasting size

ADVANTAGES

Preserves base, primer & gel-coats while removing top coats of paint.

Long-lasting, re-usable, reduces cycle time of finishing operations in wheel blasting, air blasting and tumbling operations.

Selective coatings removal, preserves microfinishes, replaces sandblasting to avoid problem of silicosis.

APPLICATIONS

Used to remove paint & coatings from boats, buildings, bridges, outdoor statues, cars and for graffiti removal.

Aircraft engine clean-out, steam turbines and mold cleaning.

Deflashing and deburring parts, thermosets, plastics & die casting.

What does walnut shell sandblasting entail?

Walnut shell sandblasting is a nature-friendly process in which crushed shells are used as abrasives. When these crushed particles are used for surface preparation, they remove dirt, paint, carbon, and rust on surfaces without harming the material under them.

This technique is especially in demand for industries that deal with fragile surfaces, like car parts, aerospace parts, and industrial machinery. Walnut shells are softer than harsh abrasives and may treat fragile surfaces without scratching or inflicting any damage; hence, they are very apt for polishing and cleaning purposes. Another good thing about walnut shell grit is that it is biodegradable and non-toxic, so it is quite good when industries aim to go green.

What Is the Process of Sandblasting?

Sandblasting uses different types of abrasive components to clean the surface and remove impurities. This process removes rust, paint, and other impurities effortlessly. They prepare the surface for any finishing process. Selection of correct abrasive media is required as it affects the quality of the surface finish. Sandblasting is a useful technique for large-scale projects, such as prepping metal surfaces for painting, removing debris from construction materials, or reviving classic cars.

Yet, sandblasting can vary in quality. Various types of media are employed based on the surface and desired outcome. Here is a brief overview of some of the frequently used types of media:

Silica Sand: Formerly popular, silica sand consists of sharp grains that are perfect for removing impurities through blasting. However, its popularity has eroded due to the health hazards involved. It is increasingly seen that inhaling silica dust can result in serious respiratory diseases.

Soda Blasting: Baking soda is actually an abrasive that will work better on sensitive surfaces, ones that demand accuracy. It's a great method of getting rid of impurities without hurting the surface beneath it.

Steel Grit

It is perfect for tasks that need a polished surface; it's a quick-cutting abrasive commonly employed in metal surface cleaning.

Glass Bead Blasting

This type of blasting is a preferred technique for achieving a matte or satin finish, commonly used in refinishing cabinets or removing paint from classic vehicles.

Garnet Grit

Garnet is a sustainable abrasive material, offered in various sizes and forms. Confined spaces like tanks or dry docks do well with this abrasive. It is well-suited for aluminum and fiberglass surfaces.

Bristle Blasting

It involves the use of steel wire bristles to eliminate contaminants, rather than a separate abrasive material. It is commonly utilized for cleaning metal surfaces that have been corroded.

Key Differences Between Walnut sandblasting and Sandblasting

Feature	Walnut Shell Sandblasting	Sandblasting
Abrasiveness	Soft and non-damaging	Varies from soft (soda) to harsh (steel grit)
Surface Sensitivity	Ideal for delicate surfaces (automotive, aerospace)	Can be too aggressive for sensitive surfaces
Environmental Impact	Biodegradable, eco-friendly	Can vary, some media (like silica) are hazardous
Health & Safety	Non-toxic, safe to use	Some media (like silica sand) can cause respiratory issues
Finish	Gentle polishing	Can range from matte to rough depending on the media
Cost	Moderately priced	Varies based on the media (garnet grit is recyclable and economical)

Can you reuse walnut shell sandblasting?

Walnut shells are a "crossover" media which means they are gentle enough to work safely on soft metals & wood construction materials, but can also strip paint & remove tough coatings when applied at higher pressures. They are very durable and can be reused several times before they break down.