35 results about "Secondary mineral" patented technology

The invention discloses a method for preparing TFT-LCD silicon micro powder through vein quartz tailings. The method comprises the steps of S1, preparing pulp, wherein the quartz tailings are sent into a pulp preparing bucket, and an anion-cation mixed collecting agent and industrial grade H2SO4 are added into the pulp preparing bucket to prepare the pulp; S2, conducting flotation, wherein impurity minerals which floats in the form of foams are removed; S3, agent removing, wherein agent water in mortar after flotation is removed through a screw sand washer; S4, washing, wherein water is added into the mortar after agent removing to be cleaned; S5, dehydrating; S6, drying; S7, magnetic separation, wherein ferromagnetic minerals are further removed; S8, ball grinding and classification, wherein fine sand after treatment in the step S7 is sent into a non-mineral ball grinding machine for mineral grinding, meanwhile, two classifiers are adopted in sequence for classification, coarse sand which is classified by the first classifier and is bigger than 74 micrometers in particle size is returned to the non-mineral ball grinding machine for secondary mineral grinding, fine sand which is classified by the second classifier and is smaller than 45 micrometers in particle size is cut off, and therefore the TFT-LCD silicon micro powder of which the particle size is 45-74 micrometers is obtained.

The invention relates to a system and a method for the processing of minerals containing the lanthanide series and the production of rare earth oxides, which allow a completely closed and continuous treatment of the different materials and desorbent agents involved in the process, thus improving the efficiency in the extraction and avoiding environmental risks associated. The method comprising thesteps of: reception and conditioning of the raw material; desorption of valuable product through a plurality of mixing and reaction stages in which the raw material is contacted in countercurrent with a stream of desorbent solution; separation of fine solids; precipitation of secondary minerals through the use of a first reactive solution; precipitation of rare earth carbonates through the use ofa second reactive solution; and drying and roasting of the rare earth carbonates to obtain rare earth oxides; wherein the method further comprises a secondary process that allows further processing of the residual mineral, and a dewatering and washing step wherein the residual mineral from the desorption step is washed and a lanthanide-containing liquid is recovered.

Provided are a high-efficiency filter device and wastewater treatment method for beneficiation wastewater treatment. The filter device comprises a tank body, wherein a material discharge hopper is formed in the lower part of the tank body, a wastewater supply device is arranged at the upper part of the material discharge hopper, and an anti-blocking device is arranged in the middle of the tank body; and the parts, under the anti-blocking device, in the tank body are filled with filter filler composed of secondary mineral, weak soil, collapsible soil and sandy soil, a floating water discharge device is arranged under the anti-blocking device, and the tank body is provided with water drainage pipes, waste liquid discharge pipes and liquid level sensing contacts corresponding to different liquid level positions. When beneficiation wastewater treatment is conducted through the high-efficiency filter device, wastewater is mixed with the filter filler through a water distribution device under the pressure of inlet water, the obtained mixed liquid is raised to the top from bottom to top through the anti-blocking device, and then purified water is discharged through the floating water discharge device; the filtered waste liquid is returned to an adjustment tank, and when the suspended solid content in the discharged purified water does not meet the requirements, filtration stopping andreplacement of the filter filler are conducted; the filter device has even water distribution, and no additional arrangement of a stirring device is needed; and no agglomeration of the filter filleroccurs, the filter filler is not stirred by the water discharge device, and the filter device has a high speed and a good filter effect.