CN203479001U - Electrical heating type graphite nozzle of electromagnetic-induction slag smelting furnace - Google Patents

Abstract

The utility model provides an electrical heating type graphite nozzle of an electromagnetic-induction slag smelting furnace. The electrical heating type graphite nozzle structurally comprises a graphite spiral pipe, a sizing water outlet and a water inlet, wherein the sizing water outlet is in threaded connection with the lower part of the graphite spiral pipe; the water inlet is located in the upper part of the graphite spiral pipe; and uniform spiral gaps are formed in the graphite spiral pipe through cutting. The electrical heating type graphite nozzle has the advantages as follows: comparing the electromagnetic-induction slag smelting furnace equipped with the electrical heating type graphite nozzle with a cupola furnace rock wool technology, energy consumption can be reduced by more than 60% per ton; the environment is free from contamination, the power factor of the slag smelting furnace is high, the energy consumption is low, and the temperature rising speed is high; the flow of a bottom deslagging nozzle is accurate, and melt is not wasted; the adaptive surface is large, and charge composition is adjustable; the upper temperature limit of a slag bath is 1,700 DEG C, so that requirements of melt with various qualities are met, and coke is not required; uniform melt composition is ensured by combining magnetic stirring with mechanical stirring; the energy consumption is low, the heat efficiency is high, and the waste residue amount is small; and the smelting furnace is excellent in temperature rising, temperature adjustment, heat preservation and tempering performance and large in loading capacity.

Description

The electromagnetic induction slag smelting furnace electrical heating type graphite mouth of a river

Technical field

The utility model proposes a kind of electromagnetic induction slag smelting furnace electrical heating type graphite mouth of a river, belong to slag melting equipment technology field.

Background technology

The process energy consumption of blast furnace ironmaking accounts for 60% of steel and iron industry total energy consumption, is the energy consumption rich and influential family of steel and iron industry, and its energy-saving and emission-reduction have a high potential.Blast furnace slag is a kind of solid waste that blast furnace ironmaking gives off, and not only consumes a large amount of energy in its processing procedure, also discharges a large amount of harmful substances simultaneously.Therefore, the research of carrying out blast furnace slag recycling aspect is very necessary, a kind of industrial solid wastes of blast furnace slag.The slag of discharging in blast furnace ironmaking process, claims again blast-furnace cinder, can be divided into conversion pig slag, foundry iron slag, ferromanganese ore slag etc.The states such as China and the Soviet Union are used titanomagnetite ironmaking in some areas, discharge vanadium titanium blast furnace slag.Different according to the grade of ore, 1 ton of iron of every refining is discharged 0.3～1 ton of slag, and the grade of ore is lower, and bed drain purge is larger.China approximately discharges more than 2,000 ten thousand tons at present every year.Slag is thrown meeting land occupation aside, waste resource, contaminated environment.Within 1589, Germany start to utilize blast furnace slag.After mid-term in 20th century, blast furnace slag comprehensive utilization develops rapidly.Many countries such as the current U.S., Britain, Canada, France, the Federal Republic of Germany, Sweden, Belgium have all accomplished deslagging then, are finished then, have all realized resource.The Japan utilization rate Wei85%， Soviet Union in 1980 utilization rate in 1979 is more than 70%, and China's utilization rate in 1981 is 83%.

Blast furnace slag is the refuse of discharging from blast furnace while smelting the pig iron, when furnace temperature reaches 1400-1600 ℃, furnace charge melting, the gangue in ore, the ash content in coke and cosolvent and other can not enter impurity in the pig iron and form and take silicate and aluminate and float over the slag above molten iron as main.In blast-furnace cinder, main chemical composition is SiO ₂, Al ₂o ₃, CaO, MgO, MnO, FeO, S etc.In addition, some slag also contains micro-TiO ₂, V ₂o ₅, Na ₂o, BaO, P ₂o ₅, Cr ₂o ₃deng.CaO in blast-furnace cinder, SiO ₂, Al ₂o ₃account for the more than 90% of weight.

The slag stream that mineral wool is jetted very thin with compressed air or high steam, can produce mineral wool, mineral wool can be used as insulation material, sound-absorbing material and fire proofing material etc., and the finished product of being processed by its has warming plate, insulation quilt, heat-preservation cylinder, insulation belt, abatvoix, narrow felt rug, sound-absorbing band, refractory slab and heat resistance fiber etc.Mineral wool is widely used in the departments such as metallurgy, machinery, building, chemical industry and traffic.

Direct winding-up blast furnace cinder, technique is simple, invest less, but slag wool difficult quality guarantee.Take slag as primary raw material, add silica, basalt, andesite, sometimes also can add the adjustment compositions such as lime, then blowing after fusing, high-quality mineral wool can be obtained.Many countries are all at operating mine slag wool.In addition, blast furnace slag also can be used as the raw material of cast stone, devitrified glass, fertilizer, enamel, pottery etc.

The method of operating mine slag wool has two kinds of blowing process and centrifugal process.Raw material flows out after melt in furnace, with steam or compressed air spraying, becomes the method for mineral wool to be called blowing process.Raw material drops on rotating disk after melt in furnace, and the method for making mineral wool with centrifugal force is called centrifugal process.

The primary raw material of mineral wool is blast-furnace cinder, accounts for 80%～90%, also has 10%～20% dolomite, fluorite or other as common brick head, cobble etc., and the fuel of operating mine slag wool is coke.Produce a minute batching, fusing winding-up, pack 3 operations.Mineral wool melting equipment is comprised of smelting furnace (furnace cupola or combustion gas tank furnace etc.), feeder, four roller centrifuges etc. conventionally.

Conventionally the technique of operating mine slag wool is dry slag to be melt into its method of liquid slag as follows:

1) pulverized fuel and raw material are burnt in helical form turbulent gases, generate silicate melt, and then silicate melt is configured as to mineral wool fiber.Raw meal ash or slag are spurted into burning gases highest temperature zone.Raw material proportioning is: every 100 parts of fine coal, and 50-300 parts of mineral wool raw materials, mineral wool raw materials has also been added 3-9% fine-powdered acidity in addition.

2) coke smelting furnace (furnace cupola).

3) combustion gas tank furnace, tank furnace refractory material laying, is entered right gas blowout in pond, to melt slag charge by spray gun.

4) metal electrode arc-melting slag charge (small-sized).

The blast furnace warm sludge that accounts for 80%～90% is directly filled to people's electromagnetic induction slag smelting furnace (15t-20t slag), also have 10%～20% dolomite, fluorite or other are if the ore charges such as common brick head, cobble are as additive, heating to 1550 degree left and right adjusts slag composition and in skull melting furnace, guarantees melt constant temperature, for subordinate's operation provides the slag of high-temperature liquid state flow-controllable, flowing, is the key technology of producing high-quality mineral wool.

The slag stream of controlled constant flow is the key that subordinate's blowing process and centrifugal process are produced high-quality mineral wool, and holding furnace bottom is thicker, has the factors such as a long section mouth of a river temperature is lower, and melted gangue meeting blocking channel, more can not control the flow that high temperature slag flows.

High-temperature slag is solidifying pasty state, its mobility extreme difference cooling to 1300 about degree.

Summary of the invention

The utility model proposes a kind of electromagnetic induction slag smelting furnace electrical heating type graphite mouth of a river, its object is intended to solve a difficult problem for high temperature slag constant temperature flow-control, for producing high-quality mineral wool, gets through bottleneck.It is solidifying stifled that stream is opened in the flow-control of high-temperature liquid state slag, quantifies smoothly melt cinder.Meet the technology requirement that rock wool produces.

Technical solution of the present utility model: a kind of electromagnetic induction slag smelting furnace electrical heating type graphite mouth of a river, its structure comprises graphite matter helix tube, sizing delivery port, water inlet, wherein sizing delivery port is threaded in the bottom of graphite matter helix tube, water inlet is positioned at the top of graphite matter helix tube, on graphite matter helix tube, has cut uniform gap between screw.

Advantage of the present utility model: (the electromagnetic induction slag smelting furnace of being furnished with the electrical heating type graphite mouth of a river)

1) compare with the rock wool technique of furnace cupola, the energy consumption of saving per ton is more than 60%.

2) belong to pure cleaner production, environment is not had to secondary pollution.

3) electromagnetic induction blast furnace slag smelting furnace power factor is high, and energy consumption is low, and programming rate is fast.

4) end, spills the peculiar design of pulp water mouth, guarantees that flow is accurate, and arbitrarily switch, does not waste melt.

5) burden structure adaptive surface is larger, and charge composition can regulate arbitrarily.

6) slag bath temperature upper limit reaches requirement that 1700 degree can adapt to various quality melts without coke, without entering the ashes contaminating impurity that grades.

7) magnetic agitation adds mechanical agitation and guarantees that bath composition is even.

8) energy consumption is low, and the thermal efficiency is high, and waste residue amount is little, and fibroblast rate is expensive with the obvious advantage.

9) not only intensification of smelting furnace, temperature adjustment, insulation, modified superior performance, and struck capacity is large, for good basis has been established in large-scale production.

10) solved the flow-control of the existing high temperature slag of prior art constant temperature, the solidifying stifled difficult problem of stream is opened in the flow-control of high-temperature liquid state slag, quantifies smoothly melt cinder.For producing high-quality mineral wool, get through bottleneck.Meet the technology requirement that rock wool produces.The end, spills the peculiar design of pulp water mouth, guarantees that flow is accurate, and arbitrarily switch, does not waste melt.

Accompanying drawing explanation

Accompanying drawing 1 is the structural representation at a kind of electromagnetic induction slag smelting furnace electrical heating type graphite mouth of a river.

Accompanying drawing 2 is process charts of short flow process operating mine slag wool.

In accompanying drawing 1 is graphite matter helix tube, the 2nd, sizing delivery port, the 3rd, water inlet.

The specific embodiment

Contrast accompanying drawing 1, a kind of electromagnetic induction slag smelting furnace electrical heating type graphite mouth of a river, it comprises a graphite matter helix tube 1, sizing delivery port 2, a water inlet 3 its structure.Wherein sizing delivery port 2 is threaded in the bottom of graphite matter helix tube 1, can, according to technique needs, change the sizing delivery port 2 of different bores.3 of water inlets are positioned at the top of graphite matter helix tube 1.On graphite matter helix tube 1, cut uniform gap between screw, the spacing dimension in gap and the size of pipe and thickness, can need to determine according to technique.

The course of work of the present invention: near the slag charges that foreign current → graphite matter helix tube 1 integral body is generated heat → is positioned at the water inlet 3 on graphite matter helix tube 1 top are fused into liquid state → liquid slag by graphite matter helix tube 1 internal holes, finally flow out from the sizing delivery port 2 of bottom.As slag liquid in smelting furnace need stop near slag charges that emit → foreign current power-off → graphite matter helix tube 1 integral body lowers the temperature → be positioned at the water inlet 3 on graphite matter helix tube 1 pipe inside and top, be frozen into solid-state → sizing delivery port 2 slag liquid and flow out and stop.

Contrast accompanying drawing 2, the technological process of short flow process operating mine slag wool,

Melting and adjustment warm sludge smelting furnace, by fortune stove dolly, electromagnetic induction body of heater (3t---60t), variable-frequency power sources (1000---20000kw), the compositions such as the induction electrode of the bell of liftable, rotation, liftable, rotation, calculating meter, plc control system.The technique of short flow process slag wool production is that blast furnace warm sludge is direct or transhipment warm sludge hired car packs Melting and adjustment warm sludge smelting furnace into, (it is remarkable that warm sludge packs energy-saving effect into), blast furnace warm sludge approximately 1500 degree left and right, after packing Melting and adjustment warm sludge smelting furnace into, can cool to about 1200 degree left and right, electromagnetic induction by Melting and adjustment warm sludge smelting furnace is warmed up to about 1500 degree left and right, in 80%～90% blast furnace warm sludge, adding 10%～20% quartz etc. carries out being modifiedly warmed up to about 1500 degree left and right (object that adds quartz being the grade of modified raising slag wool again, blast furnace slag wool is become to the mineral wool that quality is high, ).

The modified melted gangue that is warmed up to about 1500 degree left and right, by chute, pack hot slag stream into slag constant temperature holding furnace, slag constant temperature holding furnace has the melt cinder stem bar of two controllable flow rates, and the slag that warm sludge stem bar flows out flows to down to be made together cotton equipment and make mineral wool.The composition of blast furnace slag comprises chemical composition and mineral composition.

In chemical composition blast furnace slag, conventionally contain 15 kinds of above chemical compositions.The project of blast furnace slag complete analysis is SiO ₂, Al ₂o ₃, CaO, MgO, MnO, Fe ₂o ₃, S.Some special slags are also analyzed TiO ₂, V ₂o ₅, P ₂o ₅, Na ₂o, BaO, Cr ₂o ₃, Ni ₂o ₃deng.In all these chemical compositions, CaO, SiO ₂, Al ₂o ₃, tetra-kinds of compositions of MgO are main, they account for 95% of gross weight.SiO ₂and Al ₂o ₃from the gangue in ore and the ash content in coke, CaO and MgO are mainly from flux, and blast furnace slag is exactly mainly silicate and the aluminate being comprised of these four kinds of oxides.

The invention solves the flow-control of high temperature slag constant temperature, the solidifying stifled difficult problem of stream is opened in the flow-control of high-temperature liquid state slag, quantifies smoothly melt cinder.For producing high-quality mineral wool, get through bottleneck.

Meet the technology requirement that rock wool produces.

Have that high-temperature liquid state slag flow is controlled, temperature is adjustable (1200-1600 degree), smooth without stifled, safe and reliable, long service life, efficiently feature.

The electric heating graphite spout device that high-temperature liquid state slag flow is controlled, length (500mm-1000mm), interior bore (10mm-50mm), makes by graphite material, by the Power Regulation power utilization graphite heating graphite mouth of a river, temperature control.

The controlled electrical heating type long nozzle device of a set of liquid slag flow is equipped with in a slag holding furnace bottom, produces the process requirements of rock wool in order to meet short flow process.

Claims (1)

1. the electromagnetic induction slag smelting furnace electrical heating type graphite mouth of a river, it is characterized in that comprising graphite matter helix tube, sizing delivery port, water inlet, wherein sizing delivery port is threaded in the bottom of graphite matter helix tube, water inlet is positioned at the top of graphite matter helix tube, on graphite matter helix tube, has cut uniform gap between screw.

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