31 results about "Beryllium hydroxide" patented technology

The invention discloses a method for measuring niobium content in iron steel through a beryllium hydroxide separating sulfochlorophenol S spectrophotometric method. The method comprises the following steps: (1) weighing a sample, and dissolving into a first container with acid; (2) adding perchloric acid; (3) adding an ethylenediamine tetraacetic acid tetramine solution and / or an ethylenediamine tetraacetic acid disodium diamine solution; (4), adding ammonia water, a beryllium sulfate solution and oxalic acid; (5) filtering; (6) dissolving precipitation into a second container through acid; (7) after the precipitation is dissolved, adding tartaric acid so as to obtain a to-be-measured solution; (8) moving quantitative to-be-measured solution into a second container, and adding a sulfochlorophenol S solution, an ethylenediamine tetraacetic acid disodium diamine solution and hydrochloric acid so as to obtain a color developing liquid; (9) adding the color developing liquid into an absorption vessel, preparing a reference liquid, adding the reference liquid into the absorption vessel, and measuring the absorbency of the color developing liquid by comparison with the reference liquid at the position with the wavelength of 652 or 654; (10) calculating the niobium content in the sample according to a niobium working curve. According to the method, the measuring precision of the niobium content in the measured iron steel can be obviously improved.

The present invention provides a method for separating beryllium from beryllium-containing sludge based on mineral phase reconstruction, the beryllium-containing sludge comprising beryllium hydroxide-loaded amorphous silica and calcium sulfate, and the method comprises the steps of : S1, grinding the beryllium-containing sludge to obtain a ground product; mixing the ground product with an acid solution to obtain a solid-liquid mixture; S2, performing hydrothermal treatment on the solid-liquid mixture to make the The amorphous silica in the beryllium sludge undergoes mineral phase reconstruction, and the beryllium in the beryllium-containing sludge is further dissolved, thereby obtaining a mixed product reconstructed by the mineral phase; S3, the mixed products are sequentially carried out Cooling treatment and solid-liquid separation treatment are carried out to obtain beryllium-containing filtrate and filter residue after beryllium removal. The invention can avoid the pollution of the beryllium-containing sludge to the environment, and can efficiently separate and recover beryllium from the beryllium-containing sludge.

A dressing-metallurgy combined method for extracting beryllium oxide from alumoberyl beryllium ore is characterized in that the method sequentially includes the following steps that dolomite is subjected to reverse flotation, and dolomite ore concentrate and dolomite flotation tailings are obtained; after the dolomite flotation tailings are subjected to dense dewatering, alumoberyl flotation is performed, alumoberyl and part of gangue emerge at the same time, and beryllium ore concentrate and beryllium flotation tailings are obtained; the beryllium ore concentrate and sodium salt are evenly mixed for granulation, and leach liquor containing beryllium and leaching residues containing beryllium are obtained by means of roasting and dilute acid leaching; and extraction is performed on the leach liquor through 2-ethylhexyl phosphoric acid (P2O4), sec-octyl alcohol and a kerosene extraction agent, a beryllium-loaded organic phase and extraction raffinate are obtained, the beryllium-loaded organic phase is washed with an oxalic acid solution, beryllium is obtained from the beryllium-loaded organic phase through reextraction by means of a sodium hydroxide solution, the concentration of OH- of a reextracted solution is adjusted, beryllium is subjected to hydrolysis precipitation and calcination precipitation, and beryllium oxide is obtained. The dressing-metallurgy combined method for extracting beryllium oxide from alumoberyl beryllium ore is simple in technology, the BeO recycling rate is high, roasting decomposition is facilitated, and the dressing-metallurgy combined method for extracting the beryllium oxideis suitable for processing alumoberyl with the BeO content being 0.15-1.0%.