CN201413036Y - Flue type magnetic roasting furnace - Google Patents

Abstract

The utility model provides a flue type magnetic roasting furnace, which comprises a combustion furnace, a flue, a chimney, a firing section, a prefiring section and a slope type preheating flue, wherein the back end of the combustion furnace is provided with the firing section, the prefiring section and the slope type flue in turn, the tail end of the slope type preheating flue is connected with the chimney, the combustion furnace, the firing section, the prefiring section, the slope type preheating flue and the chimney are communicated in turn, the top end of the slope type preheating flue isprovided with a charging control hole, and the side walls of the firing section and the prefiring section are both provided with working doors, the side wall of the firing section is further providedwith a discharge door, and the lower portion of the discharge door rightly faces a water seal tank. The magnetic roasting furnace adopts a structure that two furnaces shares one wall, the working doors are respectively arranged on the outer side walls of the furnaces, the discharge door is arranged on the common inner wall between the two furnaces, and the chimney on the top end is shared by thetwo furnaces.

Description

A kind of magnetization roasting furnace of chimney flue type

Technical field

The utility model belongs to the roasting technology field in the ore dressing.

Background technology

Mostly the magnetizing roast to iron ore in ore dressing at present is to adopt shaft furnace, kiln, fluidized bed furnace etc., and the roaster of these structures all has weak point:

Shaft furnace: build stove cost height, can only handle lump ore, reduction roasting can only be used gaseous reducing agent, can not take into account other chemical scavengers roasting.

Revolution cellar for storing things stove: the cost height, change the cellar for storing things body with heat-resisting steel sheet and plate and interior wall liner refractory brick, need often maintenance, also need to rotate with high power motor.

Fluidized bed furnace: require ore particle to want thin, otherwise ore particle can not seethe with excitement, not reach the purpose of roasting, the cost height.

As seen, more than the common issue with that exists of three kinds of stoves be the cost height, effect is general, uses for medium-sized and small enterprises, is restricted.

The utility model content

The purpose of this utility model is the deficiency that exists at prior art, proposes a kind of magnetization roasting furnace of chimney flue type, and is all high to solve existing various roaster capital expenditures and running cost, to problems such as mineral aggregate are restricted.

The technical solution of the utility model is as follows:

A kind of magnetization roasting furnace of chimney flue type, it includes combustion furnace, the section of burning till, pre-burning section and the pre-heating flue of domatic, chimney, thermocouple, temperature controller and air blast; Described rear end at combustion furnace sets gradually the section of burning till, pre-burning section and domatic flue, the end of the pre-heating flue of domatic connects chimney, described combustion furnace, the section of burning till preheating, pre-burning section, the pre-heating flue of domatic and chimney communicate successively, have reinforced control mouth on the pre-heating flue of described domatic top, on the sidewall of the section of burning till and pre-burning section, have cleaning door, on the sidewall of the section of burning till, also have discharge door; The discharge door below is over against water seal tank.Be provided with thermocouple on described combustion furnace, the section of burning till, pre-burning section and the pre-heating flue of domatic, connect temperature controller by holding wire, temperature controller connects air blast by control line.

The horizontal slope of the pre-heating flue of described domatic is in 30 ° of-50 ° of scopes of horizontal slope.

Between the top of the pre-heating flue of described domatic and chimney, also be connected one section charging scffold flue.

Described magnetization roasting furnace adopts altogether wall construction of two stoves, and cleaning door is separately positioned on the lateral wall of each stove, and discharge door is arranged on the common inwall between two stoves, and the chimney on top is then shared.

The high-temperature flue gas that this roaster will produce by combustion furnace, in the section of burning till the mixing mineral aggregate that comes from the pre-burning section being burnt is finished product, push water seal tank from discharge gate, and the mixing mineral aggregate of preheating, harrow into the section of burning till by cleaning door again, the pre-burning section is filled up by the compound that the pre-heating flue of domatic gets off again, the pre-heating flue sky of domatic and by the mixing mineral aggregate on the charging scffold flue by charging control mouthful reinforced filling up, to heat like this, burn till, preheating is achieved by a stove, flue gas when above-mentioned each stove section except that having burnt till product, also preheating mineral aggregate, adsorbed flue dust again simultaneously, heat energy utilization is abundant, and is unusual on heat preservation energy-saving and minimizing solid discharge.Because this stove has been divided into several active sections, make each section be easy to Artificial Control simultaneously, operating temperature also is easy to control, can obtain better magnetizing roast effect.Owing to before the section of burning till, be provided with several preheating sections, mineral aggregate is shortened greatly at the firing time of the section of burning till, saved the time and the energy.

Because this stove can adopt two stoves to build together, shared middle wall, chimney and water seal tank etc. had both helped making full use of heat energy, again the cost-saving.

This stove in use, when adding the solid reductant coal, also to add the short gasifying agent that impels coal when sintering temperature, to gasify, roasting becomes to have ferromagnetic magnetic iron ore in stove, magnetic susceptibility is up to 96%, can material-saving, energy-conservation, generally at the coal that adds 8%～12%, could guarantee that roasting went out the product of high magnetic susceptibility in the past, and after adding short gasifying agent, the consumption of reducing agent coal drops to 1.5%～2%, short gasifying agent decomposites basic anhydride under the temperature of roasting, can also purify harmful poisonous impurity content in the finished product, play the purified product effect, experimental results show that when magnetizing roast to add 5.5%～8% short gasifying agent, impurity in the product, As reduces to 0.02Pb and 1/3. of former content has respectively fallen in Zn from 0.54, can reduce the content of poisonous and harmful metal greatly, play catharsis again.

As seen, the advantage that this stove and accessory has has: magnetizing roast is effective, the ore particle magnetic susceptibility height that roasting goes out, and capital construction cost low (building two stoves) generally ten thousand yuan of 15-20, energy savings, the production controllability is strong, and is simple to operate, production safety, cigarette is set a raft going low admittedly.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

Describe structure of the present utility model and working method in detail below in conjunction with accompanying drawing.

Referring to Fig. 1, the magnetization roasting furnace of this chimney flue type has combustion furnace 1, the section of burning till 2, pre-burning section 3, the pre-heating flue 4 of domatic, charging scffold flue 5, chimney 7, thermocouple 10, temperature controller 11 and air blast 12 etc.The pre-heating flue 4 of the section of burning till 2, pre-burning section 3 and domatic is connected to the rear end of combustion furnace 1 in turn, and the top of the pre-heating flue 4 of domatic connects charging scffold flue 5, connects chimney 7 again.Combustion furnace 1, the section of burning till 2, pre-burning section 3, the pre-heating flue 4 of domatic, charging scffold flue 5 and chimney 7 communicate successively, reinforced control mouthful 6 tops of opening at the pre-heating flue 4 of domatic.Have cleaning door 8 on the lateral wall of section of burning till 2 and pre-burning section 3, have discharge door 9 on the madial wall of the section of burning till 2, the discharge door below is over against water seal tank.On the pre-heating flue 4 of described combustion furnace 1, the section of burning till 2, pre-burning section 3 and domatic, be provided with thermocouple 10, connect temperature controller 11 by holding wire, temperature controller 11 connects air blast 12 by control line, according to the temperature conditions of active section, and the air output of control air blast 12.

This magnetization roasting furnace adopts refractory material to make, and in order to save material, adopts two stoves and builds the common chimney 7 of the common interior wall of twin furnace, shared discharge door 9, water seal tank, chimney 7 etc. altogether.

During work, control the temperature (700～800 ℃) that enters the section of burning till by the air inlet amount and the air pressure of control combustion furnace.In order to obtain the high magnetic susceptibility of ore particle, not burning or underroasting, be equipped with the thermocouple temperature controller in combustion furnace, the section of burning till and pre-burning section, in the production practices, color in the section of the burning till burner hearth is glow to yellow red, and the temperature measurer temperature is presented between 740～800 ℃, about 15～20 minutes of roasting, mineral aggregate can carry out multiple magnetic separation with buck rake and shovel with the water seal tank that the mineral aggregate that burns till pushes the below rapidly from the shared discharge gate of the section of burning till.And from the cleaning door of pre-burning section mineral aggregate is pushed the section of burning till with buck rake and shovel immediately and carry out roasting.Simultaneously because the mineral aggregate on the pre-heating flue of shape can be rolled into the pre-burning section continuously from the top, for the equal received heat of the mineral aggregate of pre-burning section even, after mineral aggregate rolls into the pre-burning section, with buck rake and shovel mineral aggregate harrow Bao Erjun, shut cleaning door.And,, increase pre-heat effect too to the preheating to a certain degree of meeting quilt owing to being to be deposited in advance on the charging scffold flue by a reinforced control mouthful mineral aggregate that adds.So repeatedly, release how many mineral aggregates by the section of burning till and go into water seal tank, how many material reinforced control mouth just adds enters the pre-heating flue of domatic.

In addition, mineral aggregate magnetizes in the magnetization roasting furnace roasting, the iron ore material is except that siderite, and other mineral aggregate is as mineral aggregates such as bloodstone, limonites, except satisfying the certain temperature of roasting magnetization, what is more important roasting when this temperature also will add reducing agent, and existing reducing agent has gaseous reducing agent such as coal gas and hydrogen etc., but equipment when making reducing gas and capital cost higher be that general small enterprise financial resources can't satisfy, the more important thing is safety problem, inflammable poisonous.This stove is general to adopt convenient and time-saving more safer solid reductant such as the coal that save money, but 8%～12% the coal that generally adds mineral aggregate because of large usage quantity in the past could guarantee that roasting goes out higher magnetic susceptibility.Therefore the applicant has added inexpensive carbonate mineral aggregate as short solid gasifying agent (5.5%～8% when adding 1.5%～2% coal charge, sneak in the mineral aggregate and add) from the control charge door, the carbon dioxide that produces when roasting promotes the carbon gasification of coal, just increase simultaneously the percentage of carbon monoxide, make the reducing power multiplication.The consumption 5-6 of saving coal doubly also reduces the poisonous and harmful impurity content of arsenic in the mineral aggregate, lead, zinc simultaneously.Purifying and purify finished product again.

Claims (4)

1, a kind of magnetization roasting furnace of chimney flue type, it includes combustion furnace (1), flue, chimney (7), thermocouple (10), temperature controller (11) and air blast (12); It is characterized in that: it also includes the section of burning till (2), pre-burning section (3) and the pre-heating flue of domatic (4); Described rear end at combustion furnace (1) sets gradually the section of burning till (2), pre-burning section (3) and the pre-heating flue of domatic (4), the end of the pre-heating flue of domatic (4) connects chimney (7), described combustion furnace (1), the section of burning till (2), pre-burning section (3), the pre-heating flue of domatic (4) and chimney (7) communicate successively, have reinforced control mouthful (6) on domatic flue (4) top of described preheating, on the sidewall of section of burning till (2) and pre-burning section (3), have cleaning door (8), also have discharge door (9) on the sidewall of the section of burning till (2), discharge door (9) below is over against water seal tank; Be provided with thermocouple (10) on described combustion furnace (1), the section of burning till (2), pre-burning section (3) and the pre-heating flue of domatic (4), connect temperature controller (11) by holding wire, temperature controller connects air blast (12) by control line.

2, the magnetization roasting furnace of chimney flue type according to claim 1 is characterized in that, 30 °-50 ° of the horizontal slopes of the pre-heating flue of described domatic (4).

3, the magnetization roasting furnace of chimney flue type according to claim 1 and 2 is characterized in that, also is connected one section charging scffold flue (5) between the top of the pre-heating flue of described domatic (4) and chimney (7).

4, the magnetization roasting furnace of chimney flue type according to claim 3, it is characterized in that described magnetization roasting furnace adopts two stoves wall construction altogether, cleaning door (8) is separately positioned on the lateral wall of each stove, and discharge door (9) is arranged on the common inwall between two stoves, and the chimney on top (7) is then shared.