Preparation device for producing boron carbide

Abstract

The invention relates to the field of boron carbide production and in particular to a preparation device for producing boron carbide. The preparation device comprises a furnace body, wherein the outlet of the furnace is connected with a crucible; a middle hole is formed in the central position in the bottom of the crucible; a disc-shaped base is arranged at the lower end of the crucible; a throughhole is formed in the middle of the disc-shaped base; a high-pressure water tube is arranged inside the disc-shaped base; a water outlet of the high-pressure water tube is formed in the inner side wall of the through hole; a high-pressure gas pipeline is arranged in the disc-shaped base; a gas outlet is formed in the inner side wall of the through hole; the gas outlet faces downwards in an inclined manner; a support base is arranged at the lower end of the disc-shaped base; a collection device is arranged at the lower end of the support base; and the bottom of the support base is connected with the upper end of the collection device through a bracket. The preparation device is reasonable in structure, novel in design, high in production efficiency and good in practicability, boron carbideof uniform powder can be prepared, the situation that the boron carbide is seriously consumed in multiple procedures is avoided, and the obtained boron carbide is high in purity.

Description

technical field [0001] The invention relates to the field of boron carbide production, in particular to a preparation device for producing boron carbide. Background technique [0002] Boron carbide, also known as black diamond, is usually gray-black micropowder. It is one of the hardest materials known due to its low density, high strength, high temperature stability and good chemical stability. It is used in wear-resistant materials, ceramic reinforcement phases, especially in lightweight armor, reactor neutron absorbers, etc. Boron carbide has a stable structure, a relative density of 2.508-2.512, a melting point of 2350°C, and a boiling point of 3500°C. It is a compound with high hardness. Boron carbide does not react with acid and alkali solutions. It is easy to manufacture and relatively cheap. It is widely used in grinding, grinding, drilling, etc. of hard materials. In the production process of boron carbide, the carbothermal reduction method is usually used, which ...

AI Technical Summary

Problems solved by technology

Oxidation is inevitably lost in the preparation of boron carbide by carbothermal reduction; in actual production, in order to speed up the reaction speed and improve production efficiency, the reaction temperature is often raised to 2300 ° C, or even above 2500 ° C; such as a boron carbide powder for nuclear industry The preparation method, which adopts the electric arc furnace carbothermal reduction method, the sintering temperature reaches 2350 ° C ~ 2500 ° C, smelting at a constant temperature for 10 h ~ 14 h, and prepares block boron carbide, and then undergoes crushing, pickling and other processes to obtain boron carbide However, the particle size of the powder obtained by this method is not uniform enough, and the uniformity of crushing and pickling cannot be ensured in the process of crushing and pickling, and the purity of boron carbide is also difficult to guarantee.

Images