SEPPE

24/09/2026

Men have sorrow and joy; they meet and part.
The moon is bright or dim and waxes or wanes.
There has been nothing perfect since the beginning of time.

As we celebrate the Mid-Autumn Festival, SEPPE team wishes you and your loved ones happiness, good health, and togetherness.

Though miles apart, we are together sharing the beauty of the moon.

May this special occasion bring warmth, joy, and cherished moments with those who matter most.

Mid-Autumn Festival Holiday
September 25–27, 2026
SEPPE will be closed during the holiday and resume normal operations on September 28.

23/09/2026

What parameters do we need to measure for cenospheres?

1. Flotation Rate
The flotation rate measures the proportion of fully intact hollow microspheres using density separation in water.
Intact cenospheres float due to their low density, while solid impurities and crushed fragments sink to the bottom.
After thorough dispersion and settling, the floating layer is collected and dried. The ratio of dried floating mass to initial sample mass determines the flotation rate.
For oil well cementing applications, our CenoLite 8540 maintains a flotation rate of ≥ 95%, which is critical for maintaining stable, low-density cement slurries.

2. Loose Bulk Density
Loose bulk density captures the mass of cenospheres per unit volume in their natural, uncompacted state, including the void spaces between individual particles.
The test is conducted without applying any external vibration or pressure, allowing the material to flow freely into a calibrated container before being leveled and weighed in accordance with ISO 23145-2:2012 (Constant Volume Method).
Our CenoLite 8540 specification is strictly controlled within 0.30–0.45 g/cm³.

3. Particle Density / True Density
Unlike bulk density, particle density accounts only for individual spheres by excluding the spaces between them while keeping their closed internal hollow cavities intact.
We measure this using helium pycnometry following ISO 12154:2014. Because helium gas molecules easily fill all inter-particle voids without penetrating the closed sphere walls, subtle pressure changes precisely calculate the actual particle volume.
SEPPE CenoLite : 0.75–0.90 g/cm³.

4. Particle Morphology
We inspect the physical integrity and surface quality of our microspheres under high-magnification optical microscopes. This qualitative and quantitative evaluation focuses on verifying sphericity, shell surface structure, the proportion of intact spheres, and the presence of broken fragments or foreign impurities.

5. Particle Size Distribution (Tailored Grading Control)
Particle size distribution directly influences packing density and surface finish, so SEPPE applies two distinct testing standards depending on the application. For oil well cementing grades like CenoLite 8540, we utilize standard sieve analysis to ensure reliable control over broader powder gradings. For high-precision coating grades like CenoLite 910, we employ laser diffraction per ISO 13320:2020 to tightly monitor critical thresholds, specifically targeting a D50 of 45–60 μm and a D98 of 105–140 μm.

22/09/2026

Cenospheres: Dry Powder & Other Forms

With the growing demand for lightweighting, thermal insulation, and functional fillers, the application of cenospheres continues to expand into sectors such as automotive materials, high-performance coatings, and specialty composites.

In the market and in practical applications, cenospheres have evolved into various forms, including dry powder, wet material, and formulated slurries.

Many customers might wonder: aren't they all the same raw material? Why do manufacturers offer both dry powder and wet forms instead of simply producing a dry powder that customers can mix with water themselves?

While the active ingredient—cenospheres—is essentially the same, the different processed forms correspond to distinct downstream production requirements, involving significant differences in cost, feeding methods, and process compatibility.

Furthermore, from a performance standpoint, re-mixing dry powder with water rarely achieves the same level of dispersion as the original wet material; high-speed mixing can also fracture the hollow shells, thereby compromising the cenospheres' lightweight and thermal insulation properties.

So, for which applications are dry powder, wet cenospheres, and cenosphere slurries respectively suited?

And how do these three forms differ in terms of transportation and storage?

1️⃣ 𝗗𝗿𝘆 𝗣𝗼𝘄𝗱𝗲𝗿 𝗖𝗲𝗻𝗼𝘀𝗽𝗵𝗲𝗿𝗲𝘀
Dried, air-classified free-flowing powder with moisture

Compare dry powder cenospheres, wet material and cenosphere slurries by application, transport, storage and feeding, with SEPPE quality-control data.

17/09/2026

𝗖𝗼𝗺𝗺𝗼𝗻 𝗣𝗿𝗼𝗯𝗹𝗲𝗺𝘀 𝗼𝗳 𝗚𝗮𝗿𝗻𝗲𝘁 𝗔𝗯𝗿𝗮𝘀𝗶𝘃𝗲𝘀 𝗬𝗼𝘂 𝗠𝘂𝘀𝘁 𝗞𝗻𝗼𝘄

𝟭. 𝗛𝗶𝗴𝗵 𝗦𝗶𝗹𝘁 𝗖𝗼𝗻𝘁𝗲𝗻𝘁: Skipping or using dirty water in the washing phase leaves silt and dust, causing clogged lines and nozzle wear.

𝟮. 𝗥𝘂𝘀𝗵-𝗝𝗼𝗯 𝗠𝗮𝗴𝗻𝗲𝘁𝗶𝗰 𝗦𝗲𝗽𝗮𝗿𝗮𝘁𝗶𝗼𝗻: Skipping or rushing multi-stage magnetic separation leaves low-hardness iron/metal contaminants in the batch.

𝟯. 𝗪𝗼𝗿𝗻 𝗦𝗰𝗿𝗲𝗲𝗻𝘀 & 𝗢𝘃𝗲𝗿𝘀𝗶𝘇𝗲𝗱 𝗚𝗿𝗮𝗶𝗻𝘀: Refusing to replace worn mesh screens releases coarse grains that directly block waterjet nozzles or crack glass.

𝟰. 𝗧𝗵𝗲 "𝗚𝗿𝗲𝗲𝗻 𝗚𝗮𝗿𝗻𝗲𝘁" 𝗖𝗼𝗻𝗰𝗲𝗽𝘁 𝗧𝗿𝗮𝗽: Packaging soft companion minerals (Mohs 5–6) as "Green Garnet." Due to their low hardness and lower density, these minerals break down quickly upon impact, leading to significantly higher abrasive consumption and higher real job costs.

𝗛𝗼𝘄 𝗦𝗘𝗣𝗣𝗘 𝗚𝘂𝗮𝗿𝗮𝗻𝘁𝗲𝗲𝘀 𝗚𝗮𝗿𝗻𝗲𝘁 𝗤𝘂𝗮𝗹𝗶𝘁𝘆

From the SEPPE Quality Control Hub, you can view SEPPE’s published garnet analysis reports and information on different specifications.

We strictly control all production links, and keep silt content and soluble chloride levels far below industrial standards, preventing silt buildup or corrosion inside blasting/waterjet systems.

We reject the practice of sacrificing quality for production capacity, adopt multiple magnetic separation processes to remove light minerals and metal impurities, and replace screens regularly to ensure no low-hardness associated impurities are mixed in and to avoid pipe clogging caused by coarse particles.

We aim to be your reliable garnet supplier, and will not just present impressive test reports as a perfunctory response.

At 𝗖𝗼𝗻𝘁𝗿𝗼𝗹𝗹𝗲𝗱 𝗧𝗿𝗶𝗮𝗹 𝗣𝗿𝗼𝗴𝗿𝗮𝗺, you can fill in your application, equipment, current abrasive, operating conditions and the results you need to verify, then submit the form.

SEPPE will review and confirm the recommended specifications, sample quantity and available technical documents accordingly.

After receiving the samples, you can conduct a comparative trial under the premise of the same equipment, same operating conditions and replaced abrasive.

We will work through any issues together during the process, as your strongest after-sales guarantee!

15/09/2026

Do you calculate the cost of ceramic proppants based on price per cubic meter?

In standard international B2B procurement for ceramic proppants, parties typically price transactions by weight (USD/MT); subsequent processes—such as payment, container loading, contract quantities, and invoicing—also generally revolve around metric tons (MT).

Why, then, is "per cubic meter" mentioned?

The key reason is that downhole fractures require a specific volume of space to be filled, not a specific weight; the designed volume of the fracture is fixed.

For example, consider the bulk density of different SEPPE ceramic proppant grades:
SEPLITE LWP : Approx. 1.50–1.60 g/cm³
SEPROP ISP : Approx. 1.65–1.75 g/cm³
SEPREM HSP : Approx. 1.80–1.90 g/cm³

Because densities vary across grades, the actual weight of material required to fill the same 1 m³ fracture space differs:

Using SEPREM HSP requires purchasing approximately 0.30 tons more material than using SEPLITE LWP (focusing solely on the "price per ton" would completely overlook the fact that HSP involves 20% more weight).

When selecting materials and comparing options during the preliminary stages, it is essential for purchasers to compare the total cost based on volume to avoid assessment errors caused by looking only at the price per ton. Therefore, "per m³" is primarily an engineering or cost concept involving a "volume-to-weight conversion," rather than a standard unit for quoting prices.

This distinction can lead to misunderstandings, especially for novice purchasers who focus exclusively on the cost per ton:

Since HSP weighs more than LWP for the same volume, does that mean HSP is "denser" or of superior quality?

Since HSP costs over $100 more per ton than LWP, is LWP a better deal because you get more material for the same weight?
..

It is important to note that the purchaser alone cannot arbitrarily decide the choice of proppant; downhole geological and engineering conditions (specifically, closure stress) largely determine it.

In wells that do not require high compressive strength, heavy HSPs tend to settle at the bottom of the well before reaching the depths of the fractures, resulting in uneven proppant distribution and fracturing failure.

Furthermore, pumping these heavy HSPs downhole necessitates increasing the fracturing fluid viscosity or applying higher pressure, thereby raising costs associated with on-site pumping equipment and chemical additives.

Related Reading：
https://www.seppe.cn/do-you-calculate-the-cost-of-ceramic-proppants-based-on-price-per-cubic-meter.html

Learn why ceramic proppants are quoted in USD/MT but compared by cost per m³, with SEPPE LWP, ISP and HSP bulk-density calculations.

10/09/2026

Do you know what PSV stands for? Simply put, PSV (Polished Stone Value) measures a road surface's resistance to polishing.

In road engineering, a higher value indicates greater resistance to polishing and more durable skid resistance.

Accidents frequently occur on wet, slippery roads and at sharp curves; consequently, many municipal and infrastructure projects are adopting High-Friction Surface Treatment (HFST) systems to enhance grip.

While calcined bauxite is widely recognized in the refractory materials industry, it also serves as the core aggregate for HFST standards. Here is why: First, it boasts a Mohs hardness of 8–9, making it extremely resistant to grinding down or crushing by vehicle tires.

Second, it offers an exceptionally high PSV; even under the intense, repeated pressure of tens of thousands of heavy trucks daily, its microscopic surface roughness does not become "polished" smooth.

Furthermore, the crushed and screened bauxite particles are angular in shape. Under extreme wear, they do not smooth out into round spheres but instead continuously expose new, sharp edges—a property known as "self-sharpening"—thereby maintaining superior grip over the long term.

Finally, it features extremely low water absorption and high chemical stability. High-temperature calcination completely drives off chemically bound water, resulting in very low porosity; this ensures the material does not soften or delaminate because of water absorption during rainy or snowy weather.

You can view details on Low Crystalline Silica Calcined Bauxite for High-Friction & Anti-Slip Surfaces here:
https://www.seppe.cn/1-3mm-anti-slip-road-surfacing-calcined-bauxite.html

You can also read a related article here: https://www.seppe.cn/calcined-bauxite-for-high-friction-surface-and-anti-skid-pavements.html

SEPPE supplies High PSV Bauxite Aggregate, with stable Al2O3 grades, screened sizes and export packaging for refractory, casting and surfacing.

08/09/2026

Why We Built the SEPPE Quality Control Hub

Garnet abrasive is usually not the most expensive item in a project, but when abrasive problems occur, the costs can go far beyond what a purchasing team can afford.

Poor control of soluble salts or chloride ions in blasting abrasive can create risks for subsequent coating quality. Inconsistent particle size, excessive fines, or moisture absorption and clumping can also affect abrasive feed stability and cutting performance in waterjet applications. What procurement really needs to focus on is not just abrasive price, but also the risks of downtime, rework, and quality incidents.

That is why we built the SEPPE Quality Control Hub:
https://www.seppecn.com/seppe-quality-control-hub.html

We have brought together the following resources in one place:

● Public sieving data for SGA 80, SGA 30/60, and SGA 20/40
● The control process from raw material inspection, magnetic separation, washing, drying, to sieving and final product inspection
● Sample documents such as TDS data and technical standards
● Inspection items that need to be considered separately for waterjet cutting and blasting applications
● A controlled comparative trial method that can be used before bulk purchasing

A free sample sent to a customer’s site, without clear test objectives, equipment parameters, and recording methods, often produces little valuable conclusion. The sample may sit in the warehouse for months, or it may be tried briefly, only to end with a vague “it feels about the same.”

That is why we want to turn sample testing into a structured, documented product verification.

You can view the details and fill out the form here:
https://www.seppecn.com/seppe-quality-control-hub.html -trial

You provide the application, equipment, current abrasive, operating conditions, and the results you need to verify. SEPPE will then confirm the suitable specification, sample quantity, and available technical documents. Together, we record actual results such as cutting speed, abrasive feed stability, abrasive consumption, cleaning efficiency, or surface roughness.

When problems occur, we solve them together.

We do not want to rely only on laboratory data to tell customers “this product is definitely better.”

A more reliable approach is to let you use data from your own equipment to judge whether a trial order or long-term purchase is worthwhile.

04/09/2026

Quality Inspection for Steel Shot & Grit

Steel shot and steel grit are widely used for surface preparation, descaling and shot‑blasting in foundries, shipyards, steel‑structure and automotive component industries. Stable and reliable quality must be guaranteed before goods leave the factory for overseas destinations.

How many verification steps does one batch of steel shot and steel grit go through before shipment?

Recently, a customer representative visited the SEPPE production base for on‑site inspection and loading supervision of this export order. Every step was witnessed and verified item‑by‑item, including random sampling, package weighing, laboratory testing for grain size, hardness and metallographic structure, as well as container inspection and loading confirmation.

Under the witness of the customer representative, our team followed agreed inspection procedures to take random samples from the ready‑to‑ship batch. Key indicators including product appearance, grain‑size distribution, hardness and metallographic structure were tested.

Test data was confirmed on‑site upon completion to ensure bulk products satisfy the technical requirements stated in the order.
Beyond product performance, packaging and loading form critical parts of the inspection process.

Our staff conducted random weighing of finished packages, cross‑checking product model, packaging specifications, net weight and marking details. Prior to loading, container interiors were inspected to confirm they were clean, dry and suitable for cargo stowage. Goods were then loaded systematically in line with the established stowage plan.

For industrial abrasives, true stability means consistent performance across different batches. True reliability lies in full‑process control covering production, testing and final delivery.
We systematically eliminate uncertainties before container loading, so both product quality and shipment status are fully verifiable and well‑documented.

You can click the link to visit the official website：
https://www.seppe.cn/quality-inspection-for-steel-shot-grit.html

See SEPPE steel shot and grit pre-shipment checks, including sampling, weight verification, laboratory testing, container inspection and loading.

04/09/2026

From production line to ready-to-ship pallets—every bag of steel shot is precisely weighed, securely packed and efficiently handled.

Built for reliable surface preparation, descaling and shot blasting across foundries, shipyards, steel structures and automotive components.

Which grade do you use most？ shot

03/09/2026

Inside blast furnaces, rotary kilns, and petrochemical crackers, operating temperatures reach 1300°C–1800°C. As the "bones and skin" of high-temperature facilities, refractory linings bear intense chemical corrosion and mechanical wear.

Using inferior refractory raw materials can lead to premature lining cracking or slag attack, triggering unplanned shutdowns. A single day of production stoppage can cost hundreds of thousands—or even millions—of dollars.

That’s why seasoned buyers willingly pay a premium for high-quality raw materials.

🔥𝗕𝗲𝘆𝗼𝗻𝗱 𝗔𝗹𝟮𝗢𝟯: 𝗪𝗵𝗮𝘁 𝗥𝗲𝗮𝗹 𝗣𝘂𝗿𝗰𝗵𝗮𝘀𝗶𝗻𝗴 𝗘𝘅𝗽𝗲𝗿𝘁𝘀 𝗟𝗼𝗼𝗸 𝗙𝗼𝗿

Relying solely on alumina grades (e.g., Grade 80, 85, 88, 90) isn't enough. Material performance and consistency can vary drastically depending on ore origin and kiln type:

𝟭. 𝗦𝘁𝗿𝗶𝗰𝘁 𝗦𝘁𝗮𝗻𝗱𝗮𝗿𝗱 𝗖𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝗰𝗲
International standards like ISO 1927 (for sampling, homogeneity, and grain-size distribution) and ASTM C20 (for bulk density and apparent porosity) are vital for evaluation.

𝟮. 𝗖𝗼𝗺𝗽𝗿𝗲𝗵𝗲𝗻𝘀𝗶𝘃𝗲 𝗠𝗲𝘁𝗿𝗶𝗰𝘀 𝗖𝗵𝗲𝗰𝗸
Always review impurity levels (Fe, Ti), bulk density, apparent porosity, and particle size distribution. Under-calcined ore or excessive water-absorbing micropores will severely shorten lining lifespan.

𝟯. 𝗣𝗿𝗼𝗰𝘂𝗿𝗲𝗺𝗲𝗻𝘁 𝗕𝗲𝘀𝘁 𝗣𝗿𝗮𝗰𝘁𝗶𝗰𝗲𝘀
Confirm whether Rotary Kiln or Shaft Kiln material is required, demand authentic batch COAs, and run laboratory trials in real formulations before bulk procurement.

💡 𝗡𝗲𝗲𝗱 𝘁𝗮𝗶𝗹𝗼𝗿𝗲𝗱 𝗰𝗮𝗹𝗰𝗶𝗻𝗲𝗱 𝗯𝗮𝘂𝘴𝗶𝘁𝗲 𝗳𝗼𝗿 𝘆𝗼𝘂𝗿 𝘀𝗽𝗲𝗰𝗶𝗳𝗶𝗰 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻?

SEPPE Technologies matches suitable grades and size fractions according to your Al2O3 requirements and operating conditions, complete with full batch documentation.

💬Have questions about selecting the right bauxite grade? Drop a comment or send us a message!