Battery Manufacturing EquipmentKejing dual-planetary laboratory/pilot vacuum-mixing family
Kejing builds two dual-planetary vacuum mixers for electrode slurry: the MSK-SFM-18 for the lab, with a 2 L working fill, and the MSK-SFM-9-20L-2 for pilot batches, with a 20 L fill. Both combine planetary mixing, high-speed dispersion and vacuum, but their shafts and discs differ. They suit labs moving a slurry recipe from bench to pilot scale.
By Shenzhen Kejing Star Technology Company · MSK-SFM-9-20L-2 / MSK-SFM-18
Two sizes with different mixing hardware
The SFM-18 has a 2.9 L vessel, a 2 L maximum working volume and a listed minimum batch of 350 mL. It uses two twist-frame paddles, one dispersing disc and a scraper, with top speeds of 47 rpm revolution, 295 rpm mixing and 4000 rpm dispersion. The water-jacketed vessel can take optional cold or hot water.
The 20 L machine has a 25 L vessel and a 20 L working fill. It carries two mixing shafts, two dispersion shafts with four discs between them, and a removable PTFE wall scraper. It draws about 8 kW on three-phase 380 V and uses a 2XZ-2 pump; its −0.098 MPa vacuum figure applies to an empty vessel. The catalogue gives two different sets of dimensions for this machine, so ask for the current general arrangement drawing before planning the room.
| Parameter | Published value | Record status |
|---|---|---|
| SFM-18 effective fill maximum | 2 L | known |
| SFM-9-20L-2 effective fill | 20 L | known |
| Pilot stated unloaded vacuum | −0.098 MPa | known |
Catalogue values apply to the configuration and test method the maker states. Ask for the values that apply to your configuration.
Scale the slurry result along with the speeds
Specify the solvent and binder, powder loading, particle properties, how viscosity is measured, the order of addition and your targets for dispersion and air removal. Disc and paddle shapes and the working fill differ between the two machines, so the same rpm gives different shear. Match the slurry properties at pilot scale and adjust speeds to reach them.
The pilot catalogue gives an application range of 1000–100000 cP with loose viscosity wording. Ask Kejing for the measurement method, temperature and the speed or torque it refers to. Temperature is read at the vessel wall, so the bulk of the batch may differ from the jacket setting. Ask for vacuum performance with a loaded vessel, the temperature history of a batch and the sampling method used to judge mixing consistency.
A past university purchase and your own trial
A public purchase record from ECUST dated 6 May 2025 shows one MSK-SFM-9-20L-2 mixer bought from Shenzhen Kejing. It confirms the model has been supplied; price and requirements in that record were for that buyer, so get a current signed specification and quotation for yours.
Watch batches at your minimum and working fill, keep the recipe and samples, and agree limits for residual material and cleaning between products. The pilot catalogue says the scraper comes out for high-viscosity work, so note which setup the trial used. Go through the lift, lid, vacuum, overcurrent and overtemperature protections using the supplier's procedures. Settle cooling, pump and cleaning responsibilities, spare seals and the finish of wetted parts before handover.
Kejing's profile lists the smaller MSK-SFM-16 for millilitre batches, the Kejing millilitre-scale mixer, and its lab coaters for the next step. Judge the slurry on a coated sample, as the coating width page explains, and agree the trial as the acceptance testing page suggests.
Questions that change the purchase
| Decision | What the catalogue says | Next step |
|---|---|---|
| Which working fill do you need? | The vessels are 2.9 L and 25 L in total, with working fills of 2 L and 20 L. | Trial your batch size in the chosen shaft arrangement. |
| What vacuum does the loaded slurry see? | The catalogue gives −0.098 MPa for an empty pilot vessel. | Agree a loaded vacuum hold and air-removal check. |
| Which installation drawing is current? | The catalogue gives two different sets of pilot dimensions. | Get a signed layout and utility schedule. |
Prepare the supplier conversation
Fill in the conditions below and ask the supplier to answer each open point in writing. Copying or downloading stays in your browser; nothing is sent.
Sources and check dates
The maker's own pages and public records used for this page, each with the date it was checked.
s1 · Kejing dual-planetary laboratory/pilot vacuum-mixing family original equipment description
Shenzhen Kejing · Manufacturer-origin source
Kejing's description of the dual-planetary mixer family, with vessel sizes, shafts, speeds, vacuum and services.
Archived source check: 2026-10-11
s2 · Official equipment catalogue with model links
Shenzhen Kejing · Manufacturer-origin source
Kejing's catalogue with links to each mixer model, useful for comparing the lab and pilot sizes.
Archived source check: 2026-10-11
s3 · Related laboratory planetary configuration
Shenzhen Kejing · Manufacturer-origin source
Kejing's page for the 2 L lab planetary mixer, with its paddles, disc, speeds and jacket options.
Archived source check: 2026-10-11
s4 · ECUST 2025 MSK-SFM-9-20L-2 purchase result
Original university public record · Public original record
A university purchase result showing one MSK-SFM-9-20L-2 mixer supplied by Shenzhen Kejing in 2025.
Archived source check: 2026-10-11
Read original record →Still to confirm
- Vacuum level with your slurry in the vessel.
- The viscosity measurement behind the 1000–100000 cP range.
- The current installation drawing for the 20 L machine.
- Mixing consistency and batch temperature on your recipe at both scales.
Lab and pilot vacuum slurry mixing, 2 L to 20 L
- Formulation, working fill and viscosity method
- Chosen mixer and shaft setup, timed recipe
- Dispersion and air-removal sampling and limits
- Wall and bulk temperature, cooling, loaded vacuum trial
- Current dimensions, power and pump services
- Scraper use, cleaning, seals and interlock check