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and innovation to
the mining and
metallurgical sector

Ore Concentrate Filtration

After mine excavation, the mining process, forecasts to separate the valuable ore like iron ore, copper, zinc, molybdenum, coal concentrate etc.. from the undesired materials called tailings. This process is done in the ore concentrator plant or beneficiation plant. The main steps of the beneficiation process are crushing, milling, screening and the separation of the valuable ores like copper concentrate, zinc concentrate, iron ore concentrate, lead concentrate, fine coal or gold from the tailings.

The other stream of undesired materials is called slurry tailings that will go to the tailings management process or tailings management plant. Today the best available technology for the dewatering and filtration of the mineral concentres like copper concentrate, zinc concentrate, iron ore concentrate, lead concentrate, fine coal or gold is the membrane filter press technology. The membrane filter press equipped with the cake drying system allows to make the filtration and drying of the ore concentrate in one single step. The membrane filter press thanks to its Of course, filtration and the cake drying system allows to reach a residual moisture lower than 7% even with fine concentrate ore, as it is required from most of the metallurgical process.

Of course, the value of the required residual cake moisture in the dry filtered cake is linked to the different ore's characteristics. Like copper concentrate, zinc concentrate, iron ore concentrate, lead concentrate, fine coal or gold have different level of required residual moisture after membrane filter press dewatering process. For the ore concentrate filtration Dewater Filter Press Italy has developed the Dewater HP membrane filter presses. It is a very fast and fully automatic filter press able to dewater high to very high volume of mineral concentrates like in the case of copper concentrate, iron ore concentrate, Zinc concentrate, fine coal etc. Instead for the filtration of medium to small capacity ore concentrates the Dewater SP membrane filter press can be used like in the case of lead concentrate, molybdenum concentrate etc.

Tailings Filtration and Management

The management of Slurry Tailings is an important challenge the mining sector is facing today. For sustainable mining practices, it is necessary to organise safe & environment friendly storage of the huge volume of tailings produced from the enrichment plants of copper, gold, iron ore, zinc etc. Additionally, an efficient tailings management offers the potential to recycle back process water of approx. 85-90% from tailings slurry resulting more water efficient concentrator.

In comparison to other available technologies such as wet or thickened/paste tailings, Dewater Filter Press Italy views that tailings management by Filtration and dry stacking is the safest, long term & the most environment friendly solution. However, the main reason mining industry did not able to implement this excellent solution in an aggressive way is purely economical.

Hence with the goal to motivate the mining sector to implement this solution, Dewater Filter Press Srl. with modern & smart engineering developed the most affordable complete filtration solutions for tailings management.

With over 25 years of experience of Dewater Filter Press Srl. engineers in high-capacity filtration applications, Dewater is fully focussed in supplying reliable filtration solutions for high-capacity applications. Dewater's goal is to provide fastest possible, reliable dewatering performance for high-capacity applications in order to achieve highest possible water recovery at the lowest possible operating expenses.

Filter Press for Metal Refinery

Filter presses in metal refinery plants has a wide range of applications. In fact, in the metallurgical plant the filter press can be used

• in the main production line or
• in the filtration of waste residues resulting from the metal refining process.

Usually, the metal refinery plants receive from the mine a mineral concentrate like zinc concentrate, copper concentrate, bauxite etc. To extract and purify the metal contents from the mineral concentrate the metallurgical plants applies pyrometallurgical process or chemical process or combination of both again, electrowinning process. again, this processes produce slurry that Usually, be filtered by the filter press Usually, purify the metal. A typical case is the leaching process where some acid, like sulfuric acid is used in order to extract and transform the valuable metal from the solid phase to the liquid phase. In this case the acid solution has to be filtered by the filter press to eliminate all the impurities from the acid solution. After the leaching and filter press filtration process could be used a cementation or precipitation process where other chemicals are added to the acid solution to transform again the metals that are in the liquid phase to the solid phase. And again filter press are used for the filtration of this solution. These are only few filtration cases where the filter press are used in the main metal production line.

The filter press are used also in the filtration of the residue resulting from the extraction process like the residue of alumina refinery from Bayer Process called as red mud or the slurry produced from the smelter like in the copper smelter or even the tailings slurry from Nickel HPAL refinery.

Other applications are in the purification of sulfuric acid used for the leaching process or in the purification of electrowinning solutions and in the filtration of the slurry produced after the electrowinning process. Usually the filter press for metallurgical application are special. As these filter press should able to work in acid conditions and also in high temperature conditions. For this reasons Dewater Filter Press Srl. designs and produce customised anti acid filter press with filter press parts coated with stainless steel, or polypropylene. And special filter press frame design painted with epoxide painting. In addition the filter press plates can be customised to resist to the high temperature conditions and to be also able to make cake washing and cake drying in order to increase the filtration performance.

Filter Press for Metal Refinery

Filter presses in metal refinery plants has a wide range of applications. In fact, in the metallurgical plant the filter press can be used

• in the main production line or
• in the filtration of waste residues resulting from the metal refining process.

Usually, the metal refinery plants receive from the mine a mineral concentrate like zinc concentrate, copper concentrate, bauxite etc. To extract and purify the metal contents from the mineral concentrate the metallurgical plants applies pyrometallurgical process or chemical process or combination of both again, electrowinning process. again, this processes produce slurry that Usually, be filtered by the filter press Usually, purify the metal. A typical case is the leaching process where some acid, like sulfuric acid is used in order to extract and transform the valuable metal from the solid phase to the liquid phase. In this case the acid solution has to be filtered by the filter press to eliminate all the impurities from the acid solution. After the leaching and filter press filtration process could be used a cementation or precipitation process where other chemicals are added to the acid solution to transform again the metals that are in the liquid phase to the solid phase. And again filter press are used for the filtration of this solution. These are only few filtration cases where the filter press are used in the main metal production line.

The filter press are used also in the filtration of the residue resulting from the extraction process like the residue of alumina refinery from Bayer Process called as red mud or the slurry produced from the smelter like in the copper smelter or even the tailings slurry from Nickel HPAL refinery.

Other applications are in the purification of sulfuric acid used for the leaching process or in the purification of electrowinning solutions and in the filtration of the slurry produced after the electrowinning process. Usually the filter press for metallurgical application are special. As these filter press should able to work in acid conditions and also in high temperature conditions. For this reasons Dewater Filter Press Srl. designs and produce customised anti acid filter press with filter press parts coated with stainless steel, or polypropylene. And special filter press frame design painted with epoxide painting. In addition the filter press plates can be customised to resist to the high temperature conditions and to be also able to make cake washing and cake drying in order to increase the filtration performance.

Filter Press for Chemical Industry

Filter presses in chemical plant has a wide range of applications. In addition, in the chemical plant the filter press can be used in the main production line or in the filtration of waste residue resulting from the chemical process. The filter press are used in traditional chemical industry like:

• production of pigment,
• chlorine soda plant,
• fertilizer production,
• calcium carbonate production,
• acid production,
• oil and gas production,
• biofuel production etc..

For this application Dewater Filter Press Srl. designs and produce customised anti acid filter press with filter press parts coated with stainless steel, or polypropylene. And special filter press frame design painted with epoxide painting. In addition, the filter press plates can be customised to resist to the high temperature conditions and to be also able to make cake washing and cake drying in order to increase the filtration performance.