Abstract

A ferrule device of tundish nozzle for reducing inclusions in steel contains a ferrule, a ferrule base and a wire. Structure of the ferrule is circular cylinder; inner diameter of the ferrule is same to outer diameter of matched immersion nozzle. A ferrule wire hole is set on bottom of the ferrule. The ferrule is detachably connected with the top of the ferrule base. A base wire hole throughout top surface and bottom surface of the ferrule base is set on the ferrule base. The diameter of the base wire hole is same to the diameter of the ferrule wire hole. The ferrule device of the present disclosure is easy to install and change. Installing and change process and filling of refractory material of the tundish process can be carried out simultaneously. Continuous casting process is not influenced.

IPC Classes  ?

• B22D 11/118 - Refining the metal by circulating the metal under, over or around weirs

Abstract

This present disclosure provides a rare earth additive and a method for preparing the rare earth additive to be used in production of clean energy or high-value chemicals, by which utilization of low-rank coal and biomass resources is achieved. The rare earth additive of the present disclosure is composed of rare earth chlorides, mixed rare earth chlorides, and rare earth nitrates, and can be used as additive for biochemical reactions between microorganisms and substances to be transformed, so as to improve the microbial activity in biochemical reactions. The rare earth additive promotes the transformation of low-rank coal (peat, lignite, sub-bituminous coal, weathered coal, coal gangue) and biomass into clean energy sources such as biomethane, biohydrogen, or bioethanol and high-value chemicals such as fulvic acid, water-soluble humic acid, benzoic acid, benzaldehyde, benzyl alcohol. The carbon reduction transformation of high-carbon resources such as low-rank coal and biomass may be achieved.

IPC Classes  ?

• C01F 17/271 - Chlorides
• C01F 17/276 - Nitrates
• C12N 1/38 - Chemical stimulation of growth or activity by addition of chemical compounds which are not essential growth factorsStimulation of growth by removal of a chemical compound

Abstract

A method for improving smooth running of casting of rare earth stainless steel using pulse current includes the following steps: setting corresponding initial pulse voltage, pulse current, and pulse frequency in accordance with difference of rare earth element content in molten steel; and adjusting the pulse voltage, pulse current, and pulse frequency according to position change of stopper rod until the end of continuous casting. The method can stably improve the clogging of immersion nozzle during continuous casting, the smooth running of continuous casting and production efficiency, and decrease production cost.

IPC Classes  ?

• B22D 11/11 - Treating the molten metal
• B22D 11/00 - Continuous casting of metals, i.e. casting in indefinite lengths

Abstract

The disclosure belongs to the technical field of powder metallurgy, and provides a method for preparing an aluminum-based tubular target. The method includes: sleeve assembly, raw material mixing, powder filling, sleeve degassing, hot isostatic pressing, and finished product processing.

IPC Classes  ?

• B22F 7/04 - Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting of composite layers with one or more layers not made from powder, e.g. made from solid metal
• B22F 3/15 - Hot isostatic pressing
• B22F 3/24 - After-treatment of workpieces or articles
• B22F 5/10 - Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
• B22F 9/04 - Making metallic powder or suspensions thereofApparatus or devices specially adapted therefor using physical processes starting from solid material, e.g. by crushing, grinding or milling

Abstract

The present invention belongs to the technical field of photocatalysis, and particularly relates to a method for preparing an alkane from a fatty acid under the driving of visible light. The method comprises the following steps: S1, adding a fatty acid, a catalyst and a solvent to a reaction kettle to obtain a reaction solution; and S2, irradiating the reaction kettle with visible light until the reaction solution boils, and carrying out a reflux decarboxylation reaction. In the present invention, the opposite polarities of the solvent, the product and a substrate are utilized to resolve a correct mass transfer path; by means of regulation with such a boiling solvent, the one-way output concentration, the quantum yield and the selectivity of an alkane are effectively increased, the yield of the alkane can reach up to 94.0%, the selectivity of the alkane can reach up to 95.4%, and the one-way output concentration of the alkane can reach the level of 0.5 M; and the optimal quantum yield of photocatalytic stearic acid decarboxylation of a P25 catalyst under visible light irradiation reaches 45% or higher.

IPC Classes  ?

• C07C 1/207 - Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as hetero atoms from carbonyl compounds
• C07C 9/15 - Straight-chain hydrocarbons
• C07C 9/22 - Acyclic saturated hydrocarbons with more than fifteen carbon atoms

Abstract

Provided are a rare earth auxiliary agent and a method for preparing a rare earth auxiliary agent for producing clean energy or high-value chemicals, so as to realize the resourceful application of low-rank coal and biomass. The rare earth auxiliary agent consists of a rare earth chloride, a mixed rare earth chloride and a rare earth nitrate, and can be used as an auxiliary agent for carrying out a biochemical reaction between a microorganism and a substance to be converted, thereby enhancing the activity of the microorganism in the biochemical reaction, and promoting the conversion of low-rank coal (peat, lignite, low-metamorphic bituminous coal, weathered coal and coal gangue) and biomass into clean energy, namely, high-value chemicals such as biological methane, biological hydrogen or biological ethanol and fulvic acid, water-soluble humic acid, benzoic acid, benzaldehyde, and benzyl alcohol to achieve the carbon reduction conversion of high-carbon resources such as low-rank coal and biomass.

IPC Classes  ?

• C12P 5/02 - Preparation of hydrocarbons acyclic
• C12P 3/00 - Preparation of elements or inorganic compounds except carbon dioxide
• C12N 1/38 - Chemical stimulation of growth or activity by addition of chemical compounds which are not essential growth factorsStimulation of growth by removal of a chemical compound