What is the meaning of sintering machine cooling ring after burn

Sintering machine is not a machine, but a project composed of several processes. Take the 48 square meter laterite nickel ore sintering machine project of Jinye Metallurgical Equipment Manufacturing Co., Ltd. as an example:
the main process of sintering machine is composed of the following parts:
quicklime crushing room, coal (coke) powder crushing room, batching warehouse, primary mixer room, secondary mixer room, 70m2 sintering machine room Binder, heat breaker, screening chamber, etc
batching warehouse
raw material warehouse (60) × Two 50 type loaders and one 5 * 8m sliding screen are set for drying and screening of raw ore mixed lime. They are used as the reserve material storehouse for sinter proction. There are six silos in the storehouse. The ore powder and fuel are proportioned by electronic scale and flux by screw feeder according to the set proportion and then sent to the mixer room by the main proportioning belt
mixing room
mixing room φ two point two × Two 9m mixers are used to add water to a certain humidity and mix the incoming materials well. In the second mixture, the mixture is pelletized and the mixture is heated
sintering chamber
the mixture is evenly distributed in the mixing bin along the length direction by shuttle distributor, and then the mixture is evenly distributed on the 1.5m wide sintering plate by the combination of round roller distributor and multi roller distributor, and then it is fed into the igniter along with the rotation of the plate. The mixture preheated by hot air is heated and ignited by the burning high temperature flue gas. Under the action of negative pressure ventilation, the mixture burns downward with the trolley moving forward, and the physical and chemical changes are completed at the tail of the machine, and the hot sinter is fired φ one point five × 2.0 m single roll crushing falls into the screening system
quick lime crushing chamber
the large pieces of quick lime passing the inspection are sieved to & lt; 3mm> 85% of the lime powder is sent into the flux bin, weighed and digested before batching
coal (coke) powder crushing chamber; 3mm> 85% of the fuel powder is sent into the fuel bin, and then weighed and fed to participate in the batching<
process flow
laterite nickel ore bin (3) fuel bin (1) flux bin (1)
↓ ↓
disc feeder + belt scale disc feeder + belt scale screw feeder
↓ ↓
- - - → B = 650 main batching belt ← -
↓
water → primary mixer φ two thousand and two hundred × 9000
-
water + steam → secondary mixer φ two thousand and two hundred × 9000
-
b = 650 mixture belt Gallery
-
shuttle distributor
-
mixture bin
-
round roller distributor
-
-
multi roller distributor
-
chimney ← exhaust fan ← cyclone st collector ← 48m2 sintering machine ← igniter ← gas + combustion fan

single roller crusher φ one thousand and five hundred × 2000 ← cooling water
-
cyclone st collector ← sinter storage bin ← exhaust fan (1 set)
-
finished sinter belt or electric furnace bin

Cold ore belt sintering machine is the most widely used sintering machine in China's small and medium-sized iron making enterprises. Its technology is advanced, reliable and practical, and the process is applicable: it is mainly applicable to the sintering treatment of iron ore powder in medium and small-scale smelters. Performance features: annular operation sintering, advanced process design, high efficiency and continuous operation, equipped with centralized lubrication system to ensure safe operation of the equipment. 1. Proportioning system proportioning system is composed of proportioning bin, disc feeder, proportioning belt conveyor, etc. Concentrate powder, rich ore powder, fuel, flux, return ore and other materials are loaded into the bin of the proportioning room by loader. The above materials are sent to the proportioning belt conveyor according to the required proportion by disc feeder, and then transported to the cylinder mixer by belt conveyor for mixing and pelletizing
2. Mixing granulation system: the mixing system is generally completed by secondary mixing. The primary mixing is mainly to evenly mix all kinds of materials from the batching room, and then send them to the secondary mixing pelletizing system by belt conveyor. The secondary mixing is mainly to improve the pellet quality and improve the air permeability in the sintering process. The mixture is made into a small spherical mixture of 3-8mm, accounting for 75%, The drum mixer has the advantages of wide mixing range, adapting to the change of raw materials, simple structure, reliable proction and large proction capacity
3. Mixture distribution system: the mixture distribution system is mainly composed of round roller feeder, reflecting plate and fan gate. According to the process requirements, the mixture is supplied to the reflecting plate for segregation distribution by adjusting the opening degree of the fan gate and the rotating speed of the round roller feeder, and different distribution effects are obtained by adjusting the angle of the reflecting plate
4. Gas ignition system: the gas ignition system consists of gas and air conditioning system, burner, combustion fan, ignition chamber, etc. The gas ignition system adopts blast furnace gas. The igniter uses its own preheating device to preheat the combustion air. The temperature of combustion air can be increased by 100-150 ℃, and good energy saving effect can be achieved< Sintering machine: the main system of sintering machine is mainly composed of transmission device, head and tail end seal, trolley bellows, suction device, frame, st falling system and st collection system. The main drive mechanism is set at the side of the lower part of the large plate, which is composed of motor, recer, turbine recer, etc. the normal operation of the equipment is guaranteed through the cooperation of ordinary recer and turbine recer. The tripper adopts 3KW motor, which is located at the tail of the large plate. The independent power system completes the unloading of the large plate. The trolley is closely linked with the bellows, and there is no gap to effectively prevent air leakage
6. Crushing and screening system of ore deposit: the double toothed roll crusher is installed at the tail of the sintering machine, which is mainly responsible for unloading the trolley, crushing the large ore deposit into small pieces, and hot screening the sinter crushed by the double roll crusher, so as to separate the finished proct and the return ore (for hot ore proction process); Or in order to improve the cooling effect (for the cooling ore proction process). Sintering ore ≥ 5mm is transported to phosphorus plate conveyor through chute, and then transported to ore storage tank by belt conveyor for blast furnace& lt; 5mm powder is transported to the mixing system room through the belt conveyor under the screen for mixing and sintering again
7. Exhaust st removal system: the exhaust st removal system consists of st pipe, cyclone st collector, gravity st collector and water st collector. It is composed of main exhaust fan, pipeline and chimney. The flue gas and st generated in the process of sintering exhaust and the exhaust gas and st (st is about 0.5-3g / m3) generated in the process of exhaust cooling enter the st pipe through the air box, and the st pipe (above 50mm) is removed. The flue gas and st after st removal enter the gravity st collector for secondary st removal, The st is discharged to the transport car through the ash discharge valve of the st collector and transported to the material bin of the batching room to participate in the batching. After gravity desting, it can reach the national emission standard after Cyclone and water curtain desting
8. Cooling system: the main cooling methods of sinter are blast cooling, exhaust cooling and on-board cooling. The belt cooler is mainly composed of chain, trolley, transmission device, tension device, seal and fan, and is installed with two forms of inclined and horizontal plane. Generally, the inclination angle of cooler is less than 80. The ring cooler mainly includes trolley, rotary frame, guide rail sliding frame drive device, belt conveyor and belt conveyor It is composed of feeding and discharging device, bellows (or smoke, etc.) sealing device, discharging device, fan, etc. Cooling effect of sinter: the finished proct is uniform, which can strengthen the blast furnace smelting, increase the top pressure and increase the pig iron output

Ring sintering machine is suitable for pig iron smelting, ferronickel smelting and manganese rich slag smelting of medium and small blast furnaces. It is the main equipment in the process of exhaust sintering. It can sinter concentrate powder, rich ore powder and lean ore powder with different composition and particle size into blocks, and partially eliminate sulfur, phosphorus and other harmful impurities in ores. According to the sintering area, the sintering machine can be divided into several specifications, such as 18 square meters to 90 square meters. Users can design and build the machine according to its output or site conditions, with strong flexibility. The larger the sintering area, the higher the output

(1) source of waste gas (1) sintering raw materials: loading and unloading, crushing, screening and storage and transportation: procing st gas

sintering plant proces a large amount of waste gas, high concentration of st and SO2, and serious pollution

(1) head: general electrostatic precipitator, flue gas comes from high temperature sintering waste gas

(3) in the batching workshop, raw material yard and other places, the st is generally collected by bag st collection, and the collected st is returned to the silo for reuse

a sintering machine head: ESP is generally used

(5) the particle size of st is small, < 5 μ More than 30% of the st particles are composed of 5 m st particles

b sintering machine tail: ESP or bag filter is generally used, and the market proportion is about 1:1

(1) the smoke emission is small, about 25% ~ 50% of the smoke emission of the machine head, but the st concentration is large, about 15 ~ 20 g / m3

st resistance is about 1010 Ω. The negative pressure was normal