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Returned mine sintering process and system

A technology of returning ore and process, applied in the field of ore sintering process and system, can solve the problems of the limit of the maximum usage of quicklime, the decrease of the added value of the ball-forming effect, and the increase of equipment specifications, etc. The effect of improving breathability

Inactive Publication Date: 2018-06-15
SICHUAN DONGLIN MINE TRANSPORT MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to prolong the total time of mixing and pelletizing, on the one hand, the specifications of the equipment must be increased and the investment must be increased. On the other hand, the optimal mixing and pelletizing time of the mixture also has a certain limit, which is usually 6 to 8 minutes. The time limit increases the value of the ball effect to decrease rapidly
In addition, limited by the basicity value and cost of sinter, the maximum usage of quicklime is also limited

Method used

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  • Returned mine sintering process and system
  • Returned mine sintering process and system

Examples

Experimental program
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Embodiment 1

[0036] This embodiment provides a sintering process for returning ore, including: sintering material preparation, intercalation material acquisition and mixing process;

[0037] The preparation of the sintered material includes a sintered material mixing process and a sintered material granulation process; wherein,

[0038] The sinter mixing process: adding powdered fuel and flux to the iron ore powder, mixing the iron ore powder, fuel and flux to form a mixture;

[0039] The sintered material granulation process: adding water to the mixed material, using steam to preheat the mixed material, and preparing the mixed material into granular sintered material;

[0040] The acquisition of the embedded material includes a pellet screening process and an embedded material storage process; wherein,

[0041] The pellet material screening process: firstly adjust the sieve hole, adjust the sieve hole diameter to 5mm, sieve the iron and steel metallurgical pellets or the pellets under th...

Embodiment 2

[0048] On the basis of the above-mentioned embodiment, the average rate of inputting the returning ore material to the described anti-mine bin in the described embedded material storage process is the input rate, and the output rate of the returning ore material from the described returning ore bin during the mixing process is The rate is the output rate, the input rate is equal to the output rate.

[0049] In this embodiment, the consumption rate of the returned ore material is controlled to be the same as the growth rate. Minerals are added.

Embodiment 3

[0051] On the basis of the above embodiments, the mixing process also includes a retrieving process; the retrieving process: take out the sintered material and the returned ore material at a uniform rate, and control the returned ore material to be evenly added to the sintered material .

[0052]In this embodiment, the sintered material and the returned ore material are taken out at a uniform rate, and then the returned ore material is evenly added to the sintered material. In this way, the returned ore material and the sintered material can be basically in a state of The state of uniform mixing can reduce the working time of mixing equipment and improve production efficiency.

[0053] Example 1

[0054] Such as figure 2 As shown, this embodiment provides a return ore sintering system, including sintering material preparation equipment, intercalation material obtaining equipment and mixing equipment 40; wherein,

[0055] The sinter preparation equipment includes a primary ...

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Abstract

The invention discloses a returned mine sintering process. The process comprises the steps of sintered material preparing, embedded material obtaining and uniform mixing; sintered material preparing comprises a mixing procedure and a granulation procedure; in the mixing procedure, powdery fuel and a fluxing agent are added into iron ore powder, the iron ore powder, fuel and the fluxing agent are evenly mixed, and a mixing material is formed; in the granulation procedure, water is added into the mixing material, the steam is adopted to preheat the mixing material, the mixed material is preparedinto a particular sintered material, embedded material obtaining comprises a pellet material screening procedure and an embedded material storage procedure, the pellet material screening procedure comprises the steps that steel metallurgical pellets or pellets below a blast furnace melting tank are screened, and a returned mine material is screened out; in the embedded material storage procedure,the returned mine material is transported to a pellet returned mine bin to be stored; in the uniform mixing process, the sintered material and the returned mine material are conveyed to a uniform mixing device to be evenly mixed, the returned mine material serves as an embedded material to be evenly distributed in the sintered material, and a pellet returned mine embedded type sintered material is formed. According to the process, the ventilation performance of the sintered material can be improved.

Description

technical field [0001] The invention relates to a iron and steel metallurgical sintering process and system, in particular to a returning ore sintering process and system. Background technique [0002] In iron and steel metallurgical sintering production, if the proportion of fine-grained iron concentrate powder is too high, the sinter output will be low due to the poor air permeability of the material layer, and at the same time, the power consumption of the main exhaust fan will be caused by the high suction negative pressure required Increase. The conventional way to solve this problem is to prolong the total time of mixing and pelletizing of materials, and at the same time increase the amount of slaked quicklime, which has dual functions of binder and active agent, so as to improve the mixing and pelletizing effect and improve the sintering performance. However, to prolong the total time of mixing and pelletizing, on the one hand, the specifications of the equipment mus...

Claims

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Application Information

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IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 肖阳东刘刚袁波
Owner SICHUAN DONGLIN MINE TRANSPORT MACHINERY
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