4 results about "Beryllium hydroxide" patented technology

The invention relates to the technical field of beryllium-containing wastewater treatment, in particular to a beryllium-containing wastewater circulation comprehensive utilization method and a reaction device.The beryllium-containing wastewater circulation comprehensive utilization method comprises the steps that S1, precipitation wastewater and beryllium washing wastewater are added into the reaction device; s2, sodium hydroxide is added into the wastewater, so that beryllium ions in the wastewater generate insoluble beryllium hydroxide precipitates; s3, filtering the beryllium hydroxide precipitate, and calcining to obtain a beryllium-containing finished product; s4, carrying out evaporation concentration and cooling crystallization on the residual wastewater in the step S3 to obtain ammonium sulfate-containing crystallized concentrated liquid and evaporated liquid water; and S5, putting the ammonium sulfate-containing crystallization concentrated liquid into a centrifugal machine, and carrying out centrifugal separation to obtain an ammonium sulfate crystal substance. Through periodic forward and reverse rotation of the rotating shaft II, beryllium hydroxide wastewater can be alternately filtered and discharged, so that the filtering efficiency can be improved, and ammonium sulfate, beryllium sulfate and water resources in the wastewater can be effectively recycled.

To provide a novel method for producing a beryllium solution, which has high energy efficiency.SOLUTION: A method (M10) for producing a beryllium liquid includes a main-heating step (S12) for producing the beryllium liquid by using beryllium and a material containing the beryllium as starting materials and dielectrically heating an acid liquid containing the starting materials.SELECTED DRAWING: Figure 1

The application discloses a method for high-selectivity recovery of beryllium from lithium smelting beryllium-containing clinker, and belongs to the technical field of beryllium-containing solid waste resource utilization. After the lithium smelting beryllium-containing clinker is crushed, slurry is prepared, and under the shearing action, concentrated acid is slowly added dropwise to the slurry to precisely control the pH of the slurry in the range of 3.0-3.5 to perform reaction. After the reaction is completed, solid-liquid separation is performed to obtain beryllium-containing filtrate. The beryllium-containing filtrate is subjected to precipitation by using a sodium hydroxide solution to precisely control the end-point pH of the beryllium-containing filtrate in the range of 8.5-9.0, and a composite precipitate containing beryllium hydroxide and potassium sodium cryolite is obtained. The method completely breaks the traditional situation of 'waste production waste', not only realizes efficient separation of the highly toxic beryllium, but also directly converts the beryllium-containing solid waste into 'rich beryllium potassium sodium cryolite composite concentrate' with a main phase of crystalline potassium sodium cryolite and a beryllium grade of more than 5.5%, realizing double high-value extraction of trace metals (beryllium) and bulk minerals (cryolite).

The invention discloses a method for green cooperative treatment of lithium slag, and relates to the technical field of slag treatment. The method comprises the following steps: mixing lithium slag and aluminum ash, and carrying out ball milling treatment to obtain a reaction precursor; the reaction precursor is subjected to a reduction reaction under the protective atmosphere and the negative pressure condition, and a solid product and flue gas containing beryllium, thallium and fluorine are generated; flue gas is subjected to condensation trapping, acid washing and alkali washing collection, and beryllium, thallium and fluorine are efficiently recycled; carrying out acid leaching on the condensed traps, then mixing an acid leaching solution with an acid pickling solution to obtain a mixed acid solution, adjusting the pH value, standing, and carrying out solid-liquid separation to obtain beryllium hydroxide solid and thallium-rich supernate; and adding a binder and water into the solid product to prepare spherical particles, drying, and carrying out solid-phase sintering to prepare the ceramsite. Gypsum and aluminum nitride are removed through a synergistic effect, harmless treatment of gypsum and aluminum nitride is achieved, calcium-aluminum-silicon resources are prepared into ceramsite, the ceramsite is applied to the field of building materials, the comprehensive utilization rate of two kinds of solid waste can be increased, and the environmental pressure can be relieved.