Mixed fuel ore sintering machine

Abstract

The application provides a mixed fuel ore powder sintering machine, and the equipment structure comprises an ore powder sintering machine body, a shrinkable sintering chamber, a hot air chamber, a gas injection burning device, a pulverized coal combustion supporting device, an air inlet cover, an air inlet cover and a wind force blocking device, wherein the wind force blocking device is arranged at the bottom of the ore powder sintering machine body, the air inlet cover is connected with a blowing system, the air inlet cover is connected with an exhaust system, the top of the air inlet cover is connected with the bottom of the hot air chamber, the wind force blocking device is located between the air inlet cover and the air inlet cover, and is used for blocking the leakage of hot air from the air inlet cover to the air inlet cover; the shrinkable sintering chamber is arranged at the top of the ore powder sintering machine body and above the air inlet cover, the gas injection burning device and the pulverized coal combustion supporting device are arranged at the opening at the right end of the shrinkable sintering chamber, and the opening at the right end of the shrinkable sintering chamber is adjacent to the left end of the flat top cover at the top of the hot air chamber. Excellent effects are that the sintering area is increased, the sintering temperature is high, the sintering speed is fast, the sintering quality is high, the energy supply is ensured and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metallurgy, in particular to a mixed fuel ore powder sintering machine. BACKGROUND

[0002] In the existing blast furnace ironmaking technology, iron ore is crushed and screened to obtain iron-rich ore powder, the iron-rich ore powder is sent into an ore powder sintering machine to be sintered into sintered clinker, and the sintered clinker is smelted with coke in a blast furnace to produce pig iron. The traditional sintered clinker production process is to make raw material balls by a balling machine, and then send the raw material balls into a chain sintering furnace for high-temperature sintering. The chain sintering furnace calcination process has the following disadvantages in actual application: the fuel used for ore powder sintering is water gas generated by an ironmaking blast furnace or coal gas generated by a coal gas generator, the coal gas is mixed with air to produce heat energy, and the ore powder raw material balls are sintered into sintered clinker balls, which are referred to as clinker. Due to continuous improvement of the ore powder sintering machine, the sintering capacity is increased, and the consumption of single coal gas is large, which causes unstable gas pressure. In addition, the coal gas itself has low calorific value, and the sintering time is insufficient. Therefore, the single coal gas used as fuel for ore powder sintering cannot meet the production capacity requirements of modern ore powder sintering machines. SUMMARY

[0003] The purpose of the present application is to provide a mixed fuel ore powder sintering machine.

[0004] The purpose of the present application is achieved in the following way: a mixed fuel ore powder sintering machine, the equipment structure includes an ore powder sintering machine body, a shrinkage sintering chamber, a hot air chamber, a gas injection sintering device, a coal powder combustion supporting device, an air inlet hood, an air inlet hood, and a wind force blocking device. The wind force blocking device is arranged at the bottom of the ore powder sintering machine body, the air inlet hood is connected with the air blowing system, the air inlet hood is connected with the exhaust system, the top of the air inlet hood is connected with the bottom of the hot air chamber, the wind force blocking device is located between the air inlet hood and the air inlet hood, and is used to block the leakage of hot air from the air inlet hood to the air inlet hood. The shrinkage sintering chamber is arranged at the top of the ore powder sintering machine body and above the air inlet hood, the gas injection sintering device and the coal powder combustion supporting device are arranged at the opening of the right end of the shrinkage sintering chamber, and the opening of the right end of the shrinkage sintering chamber is adjacent to the left end of the flat top cover at the top of the hot air chamber.

[0005] The mixed fuel ore powder sintering machine, the shrinkage sintering chamber is composed of an inclined top cover, a sintering chamber side wall and a U-shaped sintering trolley, the inclined top cover is connected with the sintering chamber side wall to form a right-high left-low hopper structure and is buckled on the top of the shrinkage sintering chamber, the U-shaped sintering trolley is arranged below the shrinkage sintering chamber, and the bottom edge of the sintering chamber side wall is located inside the baffle on both sides of the U-shaped sintering trolley and is in sliding sealing connection with the inner wall of the baffle on both sides of the U-shaped sintering trolley.

[0006] The inclined roof of the shrinkage sintering chamber is composed of a hanging brick beam, a hanging brick hook and a refractory brick.

[0007] The gas injection device of the mixed fuel ore powder sintering machine comprises a tool vertical tool plate, a gas main pipe, a gas discharge pipe, a gas injection head assembly and a gas flow electric control valve.

[0008] The gas injection head assembly of the mixed fuel ore powder sintering machine is composed of a shunt box and a gas injection plate.

[0009] The coal powder combustion supporting device of the mixed fuel ore powder sintering machine comprises a coal powder tank, a coal powder injection discharge pipe and a coal powder nozzle.

[0010] The coal powder combustion supporting device of the mixed fuel ore powder sintering machine comprises a coal powder tank, a coal powder injection discharge pipe and a coal powder nozzle. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a partial structure schematic view of a mixed fuel ore powder sintering machine.

[0012] Figure 2 It is a cross-section structure schematic view of a shrinkage sintering chamber.

[0013] Figure 3 It is a cross-section structure schematic view of a hot air chamber.

[0014] Figure 4 is the schematic diagram of working principle of gas injection device and coal powder combustion-supporting device;

[0015] Figure 5 is the schematic diagram of top structure of Figure 4 ;

[0016] Figure 6 is the left view of gas injection head assembly;

[0017] Figure 7 is the schematic diagram of A-A cross-section structure of Figure 6 ;

[0018] Figure 8 is the schematic diagram of left structure of Figure 5 .

[0019] BRIEF DESCRIPTION OF DRAWINGS: air induction hood 1, air inlet hood 2, air force blocking device 3, hot air chamber 4, flat top cover 5 of hot air chamber, gas main pipe 6, gas flow electric control valve 7, gas exhaust pipe 8, shunt box 9, vertical tooling plate 10, coal powder injection exhaust pipe 11, coal powder tank 12, inclined top cover 13, hanging brick hook 14, refractory brick 15, hanging brick beam frame 16, shrinkable sintering chamber 17, sintering chamber side wall 18, U-shaped sintering trolley 19, coal powder guide plate 22, ore powder sintering machine body 23. DETAILED DESCRIPTION

[0020] The present application is described in detail below with reference to the accompanying drawings.

[0021] The present application is described in detail below with reference to the accompanying drawings.

[0022] The mixed fuel ore powder sintering machine, the shrinkable sintering chamber 17 is composed of the inclined top cover 13, the sintering chamber side wall 18 and the U-shaped sintering trolley 19, the inclined top cover 13 is connected with the sintering chamber side wall 18 to form a right-high left-low dustpan-shaped structure and is buckled on the top of the shrinkable sintering chamber 17, the U-shaped sintering trolley 19 is arranged below the shrinkable sintering chamber 17, and the bottom edge of the sintering chamber side wall 18 is located inside the baffle on the left side of the U-shaped sintering trolley 19 and is in sliding sealing connection with the inner wall of the baffle.

[0023] The mixed fuel ore powder sintering machine, the inclined top cover 13 of the shrinkable sintering chamber 17 is composed of the hanging brick beam frame 16, the hanging brick hook 14 and the refractory brick 15, the refractory brick 15 is hung below the hanging brick beam frame 16 through the hanging brick hook 14, and the refractory brick 15 is assembled to form the shape of the inclined top cover 13 on the top of the shrinkable sintering chamber 17.

[0024] The mixed fuel ore powder sintering machine, the gas injection and burning device comprises a tool vertical tool plate 10, a gas main pipe 6, a gas discharge pipe 8, a gas injection head assembly and a gas flow electric control valve 7, one end of the gas main pipe 6 is connected with the gas flow electric control valve 7, the upper end of the gas discharge pipe 8 is connected with the gas main pipe in a row, the lower end of the gas discharge pipe 8 is connected with the gas injection head assembly, and the gas injection head assembly is connected with the right side of the tool vertical tool plate 10.

[0025] The mixed fuel ore powder sintering machine, the gas injection head assembly is composed of a shunt box and a gas injection plate 21, the lower end of each gas branch pipe in the gas discharge pipe 8 is connected with the shunt box 9, a group of gas injection discharge plates 21 is vertically arranged at the bottom of the shunt box 9, a gas injection discharge hole 22 is formed in the left vertical edge of each gas injection plate in the gas injection discharge plate 21, each group of gas injection discharge plates 21 forms a horizontal row of comb-shaped array, and all the gas injection discharge holes 22 in the gas injection head assembly are opposite to the right end opening of the shrinkable sintering chamber 17.

[0026] The mixed fuel ore powder sintering machine, the pulverized coal combustion supporting device comprises a pulverized coal tank 12, a pulverized coal injection and blowing pipe 11 and a pulverized coal nozzle, the lower end of each pulverized coal injection and blowing pipe in the pulverized coal injection and blowing pipe 11 is connected with the pulverized coal nozzle, the pulverized coal nozzle is composed of the tool vertical tool plate 10 and a pulverized coal guide plate 20, the pulverized coal guide plate 20 is arranged on the left side of the tool vertical tool plate 10, the tool vertical tool plate 10 and the pulverized coal guide plate 20 form a flat funnel-shaped structure with a large upper opening and a small lower opening, the upper end of the pulverized coal injection and blowing pipe 11 is connected with the pulverized coal tank 12, and the lower end of the pulverized coal nozzle is located above the jet flow negative pressure area on the left side of the comb-shaped gas injection head assembly.

[0027] Embodiment

[0028] The mixed fuel ore powder sintering machine, the mixed fuel sintering step is as follows:

[0029] The U-shaped sintering trolley on the sintering machine body moves clockwise under the drive of the driving device, and the U-shaped carriage at the upper part of the U-shaped sintering trolley uniformly spreads the raw material in the U-shaped carriage at the lower discharge port of the first storage bin according to the set raw material layer thickness under the control of the industrial computer;

[0030] When the U-shaped sintering trolley with the full raw material layer moves to the right through the first shrinkage sintering chamber, the air blower and the induced draft fan are started, the pulverized coal injection pipe and the comb-shaped gas injection head start to spray the pulverized coal and the gas, the hot air from the hot air chamber passes through the comb-shaped gas injection head to the left and mixes with the pulverized coal and the gas to burn, due to the connection of the exhaust hood below the shrinkage sintering chamber and the induced draft fan, under the negative pressure of the induced draft fan, the hot air blown from the hot air chamber and the high-speed gas jet injected from the comb-shaped gas injection head form a combustible mixed gas, which is injected into the shrinkage sintering chamber to burn, the flame burns from near to far according to the internal heat preservation space of the shrinkage sintering chamber, and the sintered material is sintered at high temperature from top to bottom, the flue gas generated after the sintered material is sintered passes through the sintered material downward into the exhaust hood and is discharged through the exhaust system; When the U-shaped sintering trolley with the sintered material layer continues to move to the right into the first hot air chamber, due to the connection of the air inlet hood below the hot air chamber and the air blower, under the action of the air blower, the cold air passes through the sintered material layer, the sintered material exchanges heat with the cold air to form hot air, which enters the hot air chamber, and the hot sintered material is cooled to enter the next layer spreading, sintering and cooling cycle;

[0031] During the flow and combustion of the combustible mixed gas in the shrinkage sintering chamber, the industrial control computer monitors the sintering temperature in the shrinkage sintering chamber and the air inlet temperature of the hot air chamber in real time, and controls and adjusts the gas flow electric control valve to control the mixed gas flow into the shrinkage sintering chamber, and further control the sintering temperature in the shrinkage sintering chamber;

[0032] When the U-shaped sintering trolley with the sintered material layer moves to the right through the second shrinkage sintering chamber, the sintering step is the same as step (3);

[0033] When the U-shaped sintering trolley moves to the right to the right end of the ring-shaped sintering body, the sintered material in the U-shaped sintering trolley has reached the set thickness, the U-shaped sintering trolley is automatically turned over and inverted, the sintered material falls into the sintered material collecting hopper under the action of gravity, and is crushed by the crusher and sent to the blast furnace for ironmaking.

[0034] In addition to the technical features described in the specification and claims, they are known to those skilled in the art.

Claims

1. A sintering machine for mixed fuel mineral powder, characterized in that... The equipment structure includes a mineral powder sintering machine body, a shrinkable sintering chamber, a hot air chamber, a gas injection device, a pulverized coal combustion aid device, an air inlet hood, an exhaust hood, and a wind-blocking device. The wind-blocking device is located at the bottom of the mineral powder sintering machine body. The air inlet hood is connected to the blower system, the exhaust hood is connected to the smoke exhaust system, the top of the exhaust hood is connected to the shrinkable sintering chamber, and the top of the air inlet hood is connected to the bottom of the hot air chamber. The wind-blocking device is located between the air inlet hood and the exhaust hood to prevent hot air leakage from the air inlet hood to the exhaust hood. The shrinkable sintering chamber is located at the top of the mineral powder sintering machine body, above the exhaust hood. The gas injection device and the pulverized coal combustion aid device are located at the opening on the right end of the shrinkable sintering chamber, which is adjacent to the left end of the flat top cover of the hot air chamber. The pulverized coal combustion aid device includes a pulverized coal tank, pulverized coal injection pipes, and pulverized coal nozzles. Each pulverized coal injection pipe in the pulverized coal injection pipe is connected to a pulverized coal nozzle at its lower end. The pulverized coal nozzle is composed of a vertical tooling plate and a pulverized coal guide plate. The pulverized coal guide plate is located on the left side of the vertical tooling plate. The vertical tooling plate and the pulverized coal guide plate form a flat funnel-shaped structure with a larger upper opening and a smaller lower opening. The upper end of the pulverized coal injection pipe is connected to the pulverized coal tank, and the lower nozzle orifice is located above the jet negative pressure zone on the left side of the comb-shaped gas nozzle assembly.

2. The mixed fuel mineral powder sintering machine according to claim 1, characterized in that: The shrink-type sintering chamber consists of an inclined top cover, sintering chamber side walls, and a U-shaped sintering trolley. The inclined top cover is connected to the sintering chamber side walls in a scoop-shaped structure with the right side higher than the left and is fastened to the top of the shrink-type sintering chamber. The U-shaped sintering trolley is arranged below the shrink-type sintering chamber. The bottom edge of the sintering chamber side wall is located inside the baffles on both sides of the U-shaped sintering trolley and is slidably sealed to the inner wall of the baffles on both sides of the U-shaped sintering trolley.

3. A mixed fuel mineral powder sintering machine according to claim 2, characterized in that: The sloping roof of the shrink-type sintering chamber is composed of a brick-hanging beam, brick-hanging hooks, and refractory bricks. The refractory bricks are suspended below the brick-hanging beam by the brick-hanging hooks and assembled into the shape of the sloping roof of the shrink-type sintering chamber.

4. A mixed fuel mineral powder sintering machine according to claim 1, characterized in that: The gas injection device includes a vertical tooling plate, a main gas pipe, a gas pipeline, a gas nozzle assembly, and a gas flow control valve. One end of the main gas pipe is connected to the gas flow control valve. The upper end of the gas pipeline is connected to the main gas pipe in a row. The lower end of the gas pipeline is connected to the gas nozzle assembly. The gas nozzle assembly is connected to the right side of the vertical tooling plate.

5. A mixed fuel mineral powder sintering machine according to claim 4, characterized in that: The gas nozzle assembly consists of a distribution box and a jet plate. Each gas branch pipe in the gas pipeline is connected to a distribution box at its lower end. A set of jet plates is vertically installed at the bottom of the distribution box. Each jet plate has a jet hole on its left vertical side. The sets of jet plates form a horizontal comb-like array. All the jet holes in the gas nozzle assembly are opposite to the opening at the right end of the shrinkage sintering chamber.

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