COAL MINES & MINERALS

In the mining sector, the filter press is used for the tailing and the concentrate.

Coal mines have to deal with the problem of disposing of the uneconomic material, by-product of the coal production. Especially, Matec machines can dewater the waste fines suspended in water, recovering them, cleaning water and eliminating tailing ponds.

Matec filter press is also employed in the concentrate recovering. For this application, the cake output must have a very low residual moisture, 6 or 7 %, and Matec filters can reach it through the installation of membrane plates which squeeze further and the core blow accessory to dry the cakes.

Processed rocks, coal and clay may contain a wide range of heavy materials, such as arsenic, lead, cadmium, chromium, iron, manganese, aluminium and nickel.

AGGREGATES SAND & GRAVEL

Aggregates like gravel and in particular sand, because of their applications, need to be washed to recover fine particles and eliminate the silt which adheres to their surfaces. Usually, the water used for sand washing can be recycled by using settling ponds in which heavier particles settle down and where they are collected from the bottom to be stocked.

Recovery and storage of these materials, which must be disposed of with excavators, trucks and personnel at a later stage, have significant costs for aggregate production industry, also due to the fact that it is necessary to dedicate a large area to these operations.

Matec filter press allows to get rid of settling ponds and produces dry cakes easy to stock and dispose of, it also recovers water which is particularly important in dry areas.

MARBLE & STONE CUTTING

In marble, granite and stone working, either in quarries or workshops or stone processing factories, water has multiple applications. From cutting to polishing, water is necessary to avoid the over-heating of tools and reduce dust produced in various processes.

Then, water needs to be treated in order to be re-used in the closed production cycle or to be discharged in the environment safely.

Matec filter press is perfect to produce dry cakes with a 15% residual moisture and recover 99% of water, occupying the minimum amount of space.

CONCRETE & TUNNELING

The water used for the washing of trucks and mixers must be treated in order to be recovered and cement remains must be disposed of or recovered at the end of the working cycle.

MATEC offers two options in their plants for the clarification of water derived from pump and cement mixer washing in concrete and cement plants. Before the filtration and purification process is carried out by the filter press, the residue can be processed by a screw separator or a dewatering screen in order to separate and select aggregates.

In tunneling applications. sludge arises and needs to be treated to be dispose of and to recover water.

Usually, the sludge from the digging is bentonite sludge.

Matec solution implies the use of one or more hydrocyclone phases before sending the material still to be treated to the clarification and filtration system by Matec. which will work at high pressure (21 BAR) to dehydrate the difficult bentonite sludge.

RECYCLING & SOIL WASHING

The recycling sector is the one dedicated to the recovery of material deriving from crushing processes and soil washing. The material has to be washed to remove the polluting part, decontaminating it.

The system works with attrition cells, special tanks where the sand is agitated to eliminate contaminants through attrition, then the material is filtrated by the filter press. An important application is for the recovery of construction materials.

GLASS & CERAMICS

In the glass workshops, the water must be treated to remove the residue deriving from glass working.

Whereas in the ceramic sector, the filter press can be used for the disposal of the slurry deriving from ceramic working or for the preparation of the ceramic pulp for the ceramic production process.

CHEMICAL PLASTIC INDUSTRIAL

Filterpresses can be both manual and automatic and can be made using various materials such as painted carbon steel. In these cases, special coatings are applied for highly corrosive environments such as the marine environment.

Filterpresses are available in various models and configurations depending on customer requirements.

Filters range from 400×400 to 2000×2000, depending on the size of the plate. We can produce machines either side beam or over beam. All filters are made of painted carbon steel, stainless steel AISI 304 or AISI 316.

Normally, the construction of the plates is PPAD, but any other plastic material can be provided for full compatibility with the product and the filtration temperature.
AISI 304 or 316 stainless steel, aluminum alloys, cast iron are other construction materials for the plates. Plastic materials including PP, aluminum alloy, cast iron or stainless steel AISI 304 or 316 can be used as construction materials of the filtering plates.

Using all these options, any construction variant can be used to meet any need in the event of corrosion, temperature or other problems. All the filters are built in accordance with the strictest accident prevention regulations and can also be constructed in accordance with ATEX standards.

Filters can be used in a wide range of industries: industrial and civil applications, mining and mining, applications in the chemical and pharmaceutical industries.