Mineral Wastes/Slags Drying

All Dryers Are Customized

Engineers available to offer overseas service

All Year Round After Sale Hotline

Free Remote Technical Support and Train

Warranty: 1 Year

Certification: ISO9001

Application: Mineral wastes, Mineral residues, Lignite Coal, Raw coal, Slags, Petroleaum coke, Coal coke, Hard coke, Solid waste, Metallurgy wastes, Metallurgy sludge, Carbide slag

Product Details

  • Mineral Waste residue

    Before Drying

  • Mineral Waste residue

    After Drying

Mineral waste or coals are generally ranked as anthracite, bituminous, sub-bituminous, and lignite, with anthracite being the oldest and lignite the youngest in the age. As coal ages, its moisture content decreases and heating value increases. The lignite coal is often being referred to as brown coal. It is considered to have the lowest rank, lowest carbon (C) content and highest moisture content. Moisture content in lignite coals can be even 60 % or more.

Lignite coals are usually shallow buried facilitating its easy open mining. These coals besides high moisture content also have high volatile content and low calorific value (CV) with easy spontaneous ignition. High moisture content is the main restraint for the application of lignite coals. Moisture content of coal causes many difficulties during processing, storage, transport, grinding, and combustion. The high moisture content considerably reduces the CV and combustion efficiency of the coal. It also results into higher heat loss in the exhaust gas.

Mineral wastes/residues drying is widely used in building materials, metallurgy, mineral processing, cement and other industries, can be used for drying Petroleum Coke, mineral waste residue, carbide slag, limestone, water slag etc. The slag dryer mainly consists of hot air equipment, rotating cylinder, high speed dispersing equipment, guiding and lifting boards, transmission device, conveying equipment, reducer, supporting device, sealing device, induced draft fan and other components.

It is rotary harrow triple-stage multi-loop drying equipment. There are three level drying processes. The process design are different with each other, to meet the material water content fluctuations at all stages. It can rapidly dry the slags from above 20% moisture content to completely dry to 5% m.c.

The special patent guiding and feeding system and material transporting trend technology overcome the "wind tunnel" phenomenon of traditional dryer. The thermal utilization rate improved, energy consumption reduced about 20%. It perfectly met different users’ requirements for particle size and moisture of dry clay.

Constitute:Hot Air System + Drying Unit + Tail Gas Treatment

Composition of ZJN dryer

Brief Introduction Of Mining And Chemical Drying Equipment

The production line of dryer for mining, metallurgy and chemical industry generally includes: heating system, drying host, induced draft system, dust removal system, conveying device and control system, etc.

The dryer for mining, metallurgy and chemical industry can use natural gas, steam, biomass particles, fuel oil, coal, boiler exhaust and other heat sources for heating. It has a wide range of applications and is convenient for different users to choose.

We can design a scientific and reasonable drying scheme according to the characteristics of materials, output, drying degree, site size and other requirements, so as to meet the diversified drying needs of users.

Working Principle Of Mining And Chemical Drying Equipment

Working principle of ZJN dryer

The dryer of mining, metallurgy and chemical industry has large heat transfer area, long drying stroke and high storage capacity. In the dryer, there are not only vortex motion, but also a lot of reciprocating motion. The unique mechanical anti guide material technology enables the dryer to hold a large number of materials.

The hot air, materials, the guiding material system and anti guide material system in the dryer complement each other and interact with each other, forming the whole benign system. The whole drying process is harmonious and orderly, the heat energy is fully utilized, the output is greatly improved, and the effect of energy saving and consumption reduction is really achieved.

Hot Air Heat Source

Heat source selection of dryer

We have different hot air generating device for you. According to your Heat Source, no matter it is natural gas, bio-gas, coal, oil, bio-mass fuel or others, we match furnace, chamber, burner etc to be most suitable. What's more, the boiler flue gas can also be used as heat.

Suitable Materials For Mining And Chemical Drying Equipment

Suitable materials for mining and chemical drying equipment

It is suitable for drying slime, raw coal, clean coal, lignite, coke, blue carbon, pulverized coal, industrial salt, iron powder, gypsum, tailings, quartz powder, bentonite, sand and other materials.

Widely used in coal, chemical, mining and other industries.

Exhaust Gas Emission Collecting System

ZJN Scrubber


Scrubber systems (e.g. chemical scrubbers, gas scrubbers) are a diverse group of air pollution control devices that can be used to remove some particulates and/or gases from industrial exhaust streams.

The exhaust gases of combustion may contain substances considered harmful to the environment, and the scrubber may remove or neutralize those. A wet scrubber is used for cleaning air, fuel gas or other gases of various pollutants and dust particles. Wet scrubbing works via the contact of target compounds or particulate matter with the scrubbing solution. Solutions may simply be water (for dust) or solutions of reagents that specifically target certain compounds.

ZJN Cyclone Dust Collector

Cyclone Dust Collector

Centrifugal cyclone dust collector, the dust will be separated and recovered in the drying system, through the dry tail gas dust purification device of a cyclone dust collector, suitable for high dust concentration, large dust particles of exhaust gas dust removal operations, the dust collector has a simple structure, stable and reliable operation, long service life, and other characteristics.

ZJN Baghouse


A bag house, also known as a bag house filter, bag filter, or fabric filter is an air pollution control device and dust collector that removes particulates or gas released from commercial processes out of the air.

Most baghouses use long, cylindrical bags (or tubes) made of woven or felted fabric as a filter medium. For applications where there is relatively low dust loading and gas temperatures are 250 °F (121 °C) or less, pleated, non woven cartridges are sometimes used as filtering media instead of bags.

Bag houses are very efficient particulate collectors because of the dust cake formed on the surface of the bags. The fabric provides a surface on which dust collects through the following four mechanisms:

Inertial collection – Dust particles strike the fibers placed perpendicular to the gas-flow direction instead of changing direction with the gas stream.

Interception – Particles that do not cross the fluid streamlines come in contact with fibers because of the fiber size.

Brownian movement – Sub micrometre particles are diffused, increasing the probability of contact between the particles and collecting surfaces.

Electrostatic forces – The presence of an electrostatic charge on the particles and the filter can increase dust capture.

A combination of these mechanisms results in formation of the dust cake on the filter, which eventually increases the resistance to gas flow. The filter must be cleaned periodically.

ZJN Mining And Chemical Drying Equipment

Advantages Of Mining And Chemical Drying Equipment

1. Negative pressure operation, good sealing and insulation effect, low heat loss, clean and sanitary site.

2. The equipment has variable speed transmission, stable operation and low failure rate.

3. The production process of the equipment is excellent, the quality is excellent, the technology is advanced and mature, and the production performance is stable and reliable.

4. The whole drying system is centralized control, high degree of automation, simple and convenient operation.

Boutique Case