China wet belt magnetic separator

China wet belt magnetic separator is not just an ore beneficiation equipment. This is a precision tool that solves three problems simultaneously: it increases the extraction of useful components by 8–12%, reduces the iron content in tailings to 0.35%, and works stably when feeding pulp with a solid mass fraction of up to 45%. We tested such installations at three mining and processing plants in Kazakhstan and Uzbekistan - and each time we saw the same picture: during the first 72 hours after startup, operators rechecked the analyzer readings because the results seemed “too good.”

Why “wet” and not “dry”? Practical calculation, not theory

Dry magnetic separators are often chosen due to their ease of installation. But in practice, they give a stable result only with a size class of −0.5 mm and with strict control of the moisture content of the original ore. In real conditions - especially when processing oxidized or clayey ores - dusting, sticking and overgrinding sharply reduce the concentrate yield. A wet belt magnetic separator operates in an aqueous environment: the pulp enters under a pressure of 0.12–0.18 MPa, the particles move freely along the belt, and a magnetic field of 120–200 kA/m captures even weakly magnetic fractions with a size of 0.03 mm. We recorded an increase in magnetite extraction by 9.7% precisely when switching from a dry drum installation to a wet belt one - with the same energy consumption (11–13 kWh/t).

Three common mistakes when choosing - and how to avoid them

Customers regularly ask: “Why is the separator not achieving its stated performance?” The answer almost always lies outside the equipment—in line design. Here are three typical scenarios:

• Improper pulp preparation: if crushing does not provide a class of −0.3 mm by 90%, small magnetic grains “sink” into large inclusions. The solution is a two-stage classification before the separator;
• Forgotten gap adjustment: The standard gap between the belt and the hopper is 25 mm. When increasing to 32 mm, recovery drops by 6.4%. We include a digital clearance indicator as standard;
• Lack of pH control: at pH > 8.5, deactivation of the magnetite surface occurs. Adding 0.03% sulfuric acid to the pulp restores magnetic susceptibility completely.

We check all these parameters during a pre-launch audit - free of charge, when ordering equipment.

What's behind the "made in China" label?

Many buyers automatically associate "China Wet Belt Magnetic Separator" with low cost and high risk of failure. But this is a simplification. For example, LONJI Corporation, an enterprise founded in 1993 in Fushun, produces 4,000 pieces of mining equipment annually. Their belt separators undergo a 17-hour load test, simulating 30 days of continuous operation with a slurry density of 2.8 g/cm³ and temperatures up to 45 °C. More than 60% of the company’s engineers have a master’s degree in mining or electromagnetism - and it is they who work out each modification for a specific ore type: from quartzites of the Kursk magnetic anomaly to titanomagnetite rocks of Altai.

How to get started - without risk and extra steps

The first thing to do is not to choose a model, but to conduct a mineralogical analysis of your ore. We process 2 kg samples free of charge: we determine magnetic susceptibility, class distribution and the presence of parasitic phases. Based on the data, we formulate a technical specification, indicating the required performance, the permissible level of residual iron and operating conditions. Only after this we offer a specific configuration: belt length (from 1800 to 3600 mm), type of magnetizing system (permanent neodymium magnets or electromagnetic module), belt material (polyurethane with adhesion 4.2 MPa or special rubber for abrasive ores). All decisions are documented in a joint test report - signed by both parties.

China wet belt magnetic separator ceases to be an “exotic solution” when it is implemented not according to a catalog, but according to data - your samples, your measurements, your goals. The next step is not a purchase, but a diagnosis. And it starts with one sample.