CN204917991U

CN204917991U - Smelting converter of carborundum

Info

Publication number: CN204917991U
Application number: CN201520548818.7U
Authority: CN
Inventors: 王泊远; 满毅; 王振江; 张继英
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-27
Filing date: 2015-07-27
Publication date: 2015-12-30
Anticipated expiration: 2025-07-27

Abstract

The utility model relates to a smelting converter of carborundum, including rotary drum, converter head, total oxygen nozzle, the rotary drum sets up for the slope, and it be 5 - 25 with the horizontally angle, and the discharge end setting of rotary drum is at the lower extreme, and the feed end setting is in the upper end, and at the sealed converter head of adorning admittedly of discharge end of rotary drum, the interior level of this converter head is equipped with the total oxygen nozzle admittedly, furnace in the rotary drum divide into preheating section, the section of burning till and soaking zone from the feed end, and the slope upper end intercommunication charge door of preheating section adopts isolation weir interval between the section of burning till and the preheating section, and the setting of total oxygen nozzle is in the section of burning till region, and its flame is held and is kept apart the weir between horizontal spacing correspondence section of burning till and the preheating section, the below of total oxygen nozzle is the soaking zone, and the slope lower extreme of this soaking zone sets up the discharge gate. The utility model provides a rotary drum structure is small and exquisite, and the design science adopts the setting of slope mode, realizes automatic compounding, the ejection of compact consequently can realizing continuous production in the rotary drum, and the drawback of intermittent type production among the prior art has been overcome in the perfection, has greatly improved production efficiency.

Description

A kind of smelting converter of silicon carbide

Technical field

The utility model belongs to field of metallurgy, relates to the preparation of silicon carbide, especially a kind of smelting converter of silicon carbide.

Background technology

Silicon carbide industrially has been widely used, but natural silicon carbide is little, the silicon carbide being mostly synthetic of industrial use, and this synthesizing silicon carbide raw material used is mainly with SiO ₂for the vein quartz of main component or quartz sand and take C as refinery coke Formed SiClx in the resistance furnace of 2000-2500 DEG C of main component.

Current, scale operation silicon carbide method used has Acheson's method and ESK method.Outer image rectangular trough of Acheson's method resistance furnace, it is the siege be built into by refractory brick, two arrays of electrodes gos deep among siege through furnace wall, special Graphite Powder 99 furnace core body configuration in-between the electrodes, a conductive channel is provided, produce very large heat during energising, contain the raw material be made up of siliceous raw material, refinery coke and wood chip etc. around furnace core body, outside is insulation material.During melting, resistance furnace is energized, and furnace core body temperature rises, and reaches about 2600 DEG C, by furnace core body surface heat transmission to the compound of surrounding, makes it the Formed SiClx that reacts, and CO gas of overflowing.Carbon monoxide generates carbonic acid gas in stove surface combustion, and chemical potential is wasted.Furnace charge hierarchical layered completely and after cooling, take furnace wall apart, is chosen, after fragmentation, is obtained desired particle size by question response, by washing or soda acid is washed, the removing such as magnetic separation impurity, improves purity, then drying, screening get product.

Acheson's method equipment is simple, less investment, extensively by the factory smelting SiC is in the world adopted.The main drawback of this method is the pollution that dust and waste gas cannot be avoided to cause, and the waste gas that smelting process is discharged cannot be collected and recycle, and cannot alleviate heavy physical labor when feeding and classification, and production economy is not high simultaneously.

1973, German ESK company improved Acheson's method, has developed ESK method.The large-scale SiC smelting furnace of Esk method is based upon open air, do not have headwall and side wall, straight line or U-shaped electrode are positioned at furnace bottom, and furnace superintendent reaches 60m, carry out sealing with escaping gas in recovery furnace with polyethylene bags, after extracting sulphur, it is delivered to small thermal power plant generating by pipeline.This method reduces ingredient requirement, sulphur content brings up to 5.0% by original 1.5%.

Above two kinds of methods all can only intermittently be produced, and need huge equipment, and production efficiency is low, and energy utilization rate is also low.

By retrieval, find two sections of patent documents relevant to the utility model application:

1, a kind of method (CN104477919A) utilizing rotary type external heat resistance furnace to produce silicon carbide, material carbon and the broken mixing of silica flour enter in rotary kiln by the method continuously, utilize characteristic converter to reach flash heat transfer mass transfer, thus make reaction fast, thoroughly.By external heating mode, avoid contaminating impurity, reduce side reaction, improve product purity.Method described in the utility model is produced silicon carbide and can be worked continuously, and the cycle is short, and energy consumption is low, technique is simple, and constant product quality purity is high.

2, a kind of method (CN104446494A) adopting internal combustion type rotary kiln to produce silicon B-carbide, carbon and silicon raw material are pulverized mixing and are entered in internal combustion type converter by the method in proportion, utilize converter characteristic to make reaction fast, thoroughly.And reduce side reaction by controlling fuel ratio.Method described in the utility model can realize continuous seepage silicon carbide, shortens the production cycle, technique is simple, with low cost, is easy to realize mass industrialized production.Overcome the shortcoming of existing intermittent production model.

By the contrast of technical characteristic, above-mentioned patent document and the utility model application all have relatively big difference in furnace binding and in preparation method, therefore can not destroy creativeness and the novelty of the utility model application.

Utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of smelting converter of silicon carbide, and this smelting converter structure is ingenious, and can realize continuous seepage, production efficiency is higher, and energy utilization rate is higher.

The utility model solves its technical problem and takes following technical scheme to realize:

A kind of smelting converter of silicon carbide, comprise rotating cylinder, converter end socket, total oxygen burner, described rotating cylinder is for being obliquely installed, the angle of itself and level is 5-25 °, and the discharge end of rotating cylinder is arranged on lower end, and feed end is arranged on upper end, the uniform interval of rotating cylinder outer rim cylinder is fixed with rolls band support, this rolls band and supports and be fixed with and roll band, and be fixed with roller seat on the basis should rolling band, this roller seat runs carrying roller; Be fixedly mounted with converter end socket in the discharge end sealing of rotating cylinder, in this converter end socket, level is fixed with total oxygen burner; Burner hearth in rotating cylinder is divided into preheating section, the section of burning till and holding-zone from feed end, the slanted upper end of preheating section is communicated with charging opening, isolation interval, weir is adopted between the section of burning till and preheating section, total oxygen burner is arranged in the section of burning till region, isolates weir between its flame end horizontal interval correspondence section of burning till and preheating section; The below of total oxygen burner is holding-zone, and the inclination lower end of this holding-zone arranges discharge port.

And, described total oxygen burner is made up of certainly outside to inside concentric thermal insulation layer, cooling layer, sealing coat, center sealing coat and pipe core, being wherein oxygen channel between sealing coat and center sealing coat, is blast tube between center sealing coat and pipe core, and pipe core is high speed oxygen channel.

Advantage of the present utility model and positively effect are:

1, the barrel configuration in the utility model is small and exquisite, design science, and adopt angled manner to arrange, realize automatic batch mixing, discharging, therefore can realize continuous seepage in rotating cylinder, perfection overcomes the drawback that prior art discontinuous is produced, and drastically increases production efficiency.

2, the utility model is provided with holding-zone, the section of burning till and preheating section in the burner hearth of cylinder, the flame of total oxygen burner is rectified the isolation weir between holding-zone and the section of burning till, reduce heat to external irradiation, heat energy is obtained at sintering stage utilize to the limit, high-temperature gas and raw material countercurrent flow, make raw material preheating more abundant, sintering effect is good, and energy utilization rate is higher.

3, total oxygen burner of the present utility model adopts concentric oxygen channel, blast tube and high speed oxygen channel three channel architectures, the formation of this flame makes efficiency of combustion very high, the inflammable gass such as the carbon monoxide of reaction generation can also be burnt, not only achieve energy-conservation, also substantially increase the combustion efficacy of flame to raw material simultaneously.

Accompanying drawing explanation

Fig. 1 is cross section schematic diagram of the present utility model;

Fig. 2 is the charging opening Facad structure schematic diagram of Fig. 1;

Fig. 3 is the radial section cutaway view Amplified image of the utility model total oxygen burner.

Embodiment

Below in conjunction with accompanying drawing, also by specific embodiment, the utility model is described in further detail, and following examples are descriptive, are not determinate, can not limit protection domain of the present utility model with this.

A smelting converter for silicon carbide, comprises rotating cylinder 2, converter end socket 1, total oxygen burner 3 and carrying roller 10, and this rotating cylinder is for being obliquely installed, and the angle of inclination of itself and level is 5-25 °, best 15 °; The discharge end of rotating cylinder is arranged on lower end, and feed end is arranged on upper end.The uniform interval of rotating cylinder outer rim cylinder is fixed with rolls band support 8, and this rolls band and supports and be fixed with and roll band 7, and be fixed with roller seat 11 on the basis should rolling band, this roller seat runs carrying roller, and carrying roller is by producing frictional force drives drum rotating with rolling to be with.

Be fixedly mounted with converter end socket in the discharge end sealing of rotating cylinder, in this converter end socket, level is fixed with total oxygen burner.

Burner hearth in rotating cylinder is divided into preheating section 6, the section of burning till 4 and holding-zone 13 from feed end, and the slanted upper end of preheating section is communicated with charging opening 9, adopts isolation interval, weir 5, to reduce the radiation loss of the section of burning till region heat energy between the section of burning till and preheating section.Total oxygen burner is arranged in the section of burning till region, isolates weir between its flame end horizontal interval correspondence section of burning till and preheating section; The below of total oxygen burner is holding-zone, and the inclination lower end of this holding-zone arranges discharge port 14.Raw material 12 enters preheating section from charging opening, and the raw material in preheating section is entered from isolation weir the section of burning till and sintered by total oxygen burner, and the discharge port of the raw material self-heat conserving section after sintering discharges rotating cylinder according to gravity.The holding-zone of rotating cylinder, the section of burning till and preheating section, according to working temperature and functional requirement, can adopt different refractory materialss to build up.

The structure of described total oxygen burner is see Fig. 3, by concentric thermal insulation layer 15, cooling layer 16, sealing coat 17, center sealing coat 18 and pipe core 19 from forming outside to inside, it is wherein oxygen channel between sealing coat and center sealing coat, be blast tube between center sealing coat and pipe core, pipe core is high speed oxygen channel.

In the utility model, productivity depends on that burner watt level is joined by converter size and institute, can, with small power work, affect little on thermo-efficiency.

Claims

1. the smelting converter of a silicon carbide, it is characterized in that: comprise rotating cylinder, converter end socket, total oxygen burner, described rotating cylinder is for being obliquely installed, the angle of itself and level is 5-25 °, and the discharge end of rotating cylinder is arranged on lower end, and feed end is arranged on upper end, the uniform interval of rotating cylinder outer rim cylinder is fixed with rolls band support, this rolls band and supports and be fixed with and roll band, and be fixed with roller seat on the basis should rolling band, this roller seat runs carrying roller; Be fixedly mounted with converter end socket in the discharge end sealing of rotating cylinder, in this converter end socket, level is fixed with total oxygen burner; Burner hearth in rotating cylinder is divided into preheating section, the section of burning till and holding-zone from feed end, the slanted upper end of preheating section is communicated with charging opening, isolation interval, weir is adopted between the section of burning till and preheating section, total oxygen burner is arranged in the section of burning till region, isolates weir between its flame end horizontal interval correspondence section of burning till and preheating section; The below of total oxygen burner is holding-zone, and the inclination lower end of this holding-zone arranges discharge port.

2. the smelting converter of silicon carbide according to claim 1, it is characterized in that: described total oxygen burner is made up of certainly outside to inside concentric thermal insulation layer, cooling layer, sealing coat, center sealing coat and pipe core, it is wherein oxygen channel between sealing coat and center sealing coat, be blast tube between center sealing coat and pipe core, pipe core is high speed oxygen channel.