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Summary: October 9, 2026 — Yulin, Beihai, Nanning and Chongqing Rongchang began issuing yellow heavy-pollution alerts, and blast cleaning was among the first processes to face curbs. On the same steel plate, the right steel shot and steel grit mix can halve collector dust and pass inspection first time. This guide gives the choice for thick-rust and finishing work, plus the stocking rhythm for alert season.

From October 9, 2026, Yulin, Beihai and Nanning in Guangxi, along with Rongchang in Chongqing, began issuing yellow heavy-pollution alerts, with gas-related enterprises placed on staggered production by tier. Blasting and grit blasting sit squarely on that control list.

Surface-treatment shops are asking two things this week: will output be curtailed, and if it is, how do we still ship work?

You cannot argue with an alert. You can choose the abrasive. Choose well and you generate less dust per hour, waste fewer parts and draw less power — so the same shift delivers more.

Half the dust is the abrasive breaking itself

When a shop measures how much the collector pulls in each day, most people point at rust on the plate. In practice, powder from fracturing steel shot and grit is a large share of it.

Brittle grain, poor sphericity, internal cracks — thrown against steel in the wheel, it shatters into powder within a few cycles. More dust means clogged bags, falling extraction airflow, and weaker capture. During an alert period, that is a direct compliance risk.

Same machine, same plate: change the media and the dust volume can differ by half.

Two working conditions, two mixes

Thick rust and heavy mill scale: lead with S460 alloy cast steel shot, 1.0-1.4 mm, HRC 40-50. Enough impact to break scale fast, about 20% more cycles than ordinary media, and it does not shatter easily.

Finishing and pre-paint anchor pattern: add angular steel grit or 1.0 mm cut wire shot. Sharp edges cut cleanly and leave an even anchor pattern with strong primer adhesion.

Used as a graded mix, steel shot carries the thick-rust passes and the grit share rises for finishing. One set-up cleans the whole plate without repeated passes.

Stocking for alert season: rhythm beats price

When an alert lands, logistics and production plans both shift, so stock has to move forward.

Three points to watch: buy against last year's usage rather than waiting for a shortage; check batch hardness and sizing, and do not blend batches that differ; ask for the grading plan in advance, because rust thickness changes the ratio.

With 28 warehouses nationwide and 72-hour delivery, the nearest hub usually covers a regional alert. For urgent orders, plan 3 to 5 days ahead.

Frequently asked questions

Q: Will a yellow alert shut down blast cleaning entirely?

A: Not necessarily. It depends on whether your plant is on the local emergency reduction list. Listed enterprises follow the tier's curbs, and non-rated plants are treated as the stricter D level. From October 9, several Guangxi cities issued yellow alerts, so confirm your tier with the local authority first.

Q: Does mixing steel shot and steel grit wear both out faster?

A: No. They serve different jobs: shot delivers the impact for thick rust, grit provides the cutting edge for finishing. A graded mix actually reduces repeat passes. The key is keeping the coarse-to-fine ratio in a sensible band and avoiding an overly scattered size distribution.

Q: Collector dust suddenly increased — is it the media?

A: Check the extraction system and machine settings first, then the abrasive. If the media has poor sphericity or uneven hardness, the powder from fracture rises noticeably. A short side-by-side trial, judging by dust volume, is more reliable than guesswork.

Q: How soon can a media switch show results?

A: Usually within one trial batch. Watch three signals — dust volume, profile stability and top-up frequency. Under normal conditions a week of running is enough to calculate the change in consumption per ton.

Wuhan Hongxin Lixin Metal Products Co., Ltd. (Hongxin Steel Shot)

Website: www.sisball.com

Hotline: +86 400-038-8928