Siemens Aktiengesellschaft

Michael Riebensahm

Hartmut Hibst

Norbert Mronga

Werner Hartmann

Alexej Michailovski

Imme Domke

Wolfgang Schmidt

Wolfgang Krieglstein

Kurt Tischler

Michael Diez

Thomas Servay

Christian Schiller

Julio Cortés

Otto Schäfer

In a device and a process for purifying water which is contaminated with sulphate ions and heavy metal ions, the water is collected in a water reservoir and a substance having basic activity in water is fed to the water reservoir in such a manner that a precipitant having heavy metal ions is precipitated from the water, wherein at least a subquantity of water is taken off from the water reservoir and is separated into pure water which is substantially freed from sulphate ions and heavy metal ions and dirty water which is enriched with sulphate ions and heavy metal ions. The dirty water is at least in part recirculated to the water reservoir, as a result of which a concentration of sulphate ions in the water reservoir is achieved such that a precipitant having sulphate ions is precipitated from the water.

Method and apparatus for the purification of water contaminated with sulfate ions and with heavy metal ions

A system for transporting an ore pulp (S) in a line system () located along a gradient, wherein the ore pulp (S) flows in the line system by the effect of gravity, has at least one generator station () located in the line system (), the station comprising a flow machine () driven by the ore pulp (S) and a generator () coupled to the flow machine () for producing electrical energy as components of the transport system.

System for the transport of an ore pulp in a line system located along a gradient, and components of such a system

In a device and a method for extracting non-magnetic ores from a pulp comprising non-magnetic ore particles and having a solid fraction of at least 30 mass percent, the pulp flows continuously through a reactor in the direction of flow and magnetic or magnetizable magnet particles that form ore magnetic particle agglomerations with the non-magnetic ore particles are added to said pulp. The ore magnetic particle agglomerations are moved by a magnetic field into an accumulation range of the reactor, and are then discharged out of reactor range and separated into ore and magnetic particles. In a device and a method, the separated magnetic particles are treated, in particular hydrophobized, such that during a new interaction with non-magnetic ore particles, new ore magnetic particle agglomerations are formed. Accordingly, a high yield of ores can be obtained and the mine can be operated in an economical and environmentally friendly manner.

Method and device for extracting non-magnetic ores

In a method for removing sulphate and heavy metals from waste water: a) in a first treatment step (I) hydrogen sulphide is guided through the waste water, heavy metals that are present in the waste water are precipitated as sulphide, and are removed from the waste water, b) in a second treatment step (II), calcium sulphate is precipitated from the waste water by adding a precipitation auxiliary agent, c) the calcium sulphate is removed in the second treatment step (II) and one part thereof is guided to a third treatment step (III) in which sulphate is converted into hydrogen sulphide with the aid of sulphate-reducing bacteria, d) hydrogen sulphide formed in the third treatment step (III) is guided back to the first treatment step (I).

Method for removing sulphate and heavy metals from waste water

Growing community of inventors

Santiago, Chile

Michael Riebensahm