31 results about "Beryllium hydroxide" patented technology

The invention discloses a beryllium slag detoxification and cement kiln collaborative resource treatment system and process. The beryllium slag can be washed with water under acidic conditions to form a beryllium sulfate solution and solid slag, wherein the beryllium sulfate solution reacts with ammonia water to generate hydrogen Beryllium oxide precipitation, the precipitation is separated and used to recover beryllium hydroxide; and the solid slag is sent to the system cement kiln for high-temperature calcination after treatment, and the beryllium contained in the solid slag is solid-fused in the cement clinker lattice to form iron beryllium acid Minerals such as calcium, aluminum beryllium and calcium beryllium, the content of beryllium in cement reaches a trace amount, and the leaching solubility is less than 0.1μg / l, which meets the requirements of cement raw materials. The ammonia nitrogen compound produced during the reaction is converted into ammonia water or ammonium salt, which can be used as The cement kiln denitrification agent or returned to the beryllium smelter as an auxiliary agent can completely eliminate the residue, completely eliminate the toxic characteristics, and realize the recycling and harmless treatment of beryllium slag.

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 invention relates to orangered glass and a production method and application thereof; the orangered glass is made from, by weight, 5-13.0% of Na2O, 1-4.5% of Rb2O, 6.4-10.0% of CaO, 2.0-3.0% of BeO, 60-65% of SiO2, 1% of Na2SO4, 4.5% of C, and 5.6% of Se; the above components are introduced in the forms of sodium carbonate, rubidium chloride, limestone, beryllium hydroxide, silica sand, sodium sulfate, carbon powder, and selenium powder respectively. The above materials are mixed well, the mixture is melted at 1485+ / -5 DEG C, the temperature is held for 90 min, the glass melt is poured into a mold that is preheated to 580 DEG C, the mold is placed a resistance furnace held at 580 DEG C for the purpose of annealing, and the temperature is held for 60 min before natural cooling to room temperature. Carbon and selenium are mixed for coloring; as carbon and selenium are used together under controlled usage, the orangered glass can be produced which has bright appearance and full color, never fades and is a novel material for making ornaments.

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.

The invention provides a preparation method of high-purity ammonium fluoroberyllate and application thereof, and in particular relates to a method of preparing high-purity ammonium fluoroberyllate; purity of the high-purity ammonium fluoroberyllate is greater than 99.95%, and the method comprises the following steps: (i), providing a mixture a of beryllium hydroxide and water; (ii), adding hydrofluoric acid into the mixture a to form a transparent mixture b; (iii), adding ammonia water into the transparent mixture b to form a mixture c containing precipitates; and (iv), carrying out recrystallization for at least twice onto the precipitates to obtain a recrystallization product, i.e., the high-purity ammonium fluoroberyllate. According to the preparation method disclosed by the invention, material requirements are low, preparation needs can be satisfied by only needing industrial beryllium hydroxide; and moreover, the obtained product contains extremely few impurities, and therefore, the preparation method can be conveniently applied to preparing the high-purity ammonium fluoroberyllate.

The invention relates to an alumina material and a preparation method thereof. According to a technical scheme in the invention, the preparation method comprises the following steps: carrying out batching according to a mass ratio of fine alumina powder to a mixed solution of 1: 2 and placing the fine alumina powder and the mixed solution in a mixer for blending for 0.5 to 8 h so as to obtain mixed slurry; draining the mixed slurry through filtering and then carrying out drying at 110 DEG C for 24 h so as to obtain a mixture block; and maintaining the mixture block at 1000 to 1300 DEG C for 1 to 6 h, then cooling the mixture block and carrying out ball milling until a particle size of 1 to 200 [mu]m is obtained so as to obtain the alumina material. The mixed solution is composed of 5 to 30% of beryllium hydroxide and 70 to 95% of an oxalic acid solution. The alumina material prepared in the invention has the characteristics of stable high temperature performance, great high-temperature strength, a small thermal expansion coefficient and high thermal shock stability, and is a novel raw material for preparation of a refractory material used in high-temperature industry.

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%.