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Double-shaft-furnace joint production system and method for treating two paths of gas with single bath towers

A technology of combined production and water washing tower, applied in the field of metallurgy, can solve the problem of low utilization rate of resources, and achieve the effect of simplifying gas processing equipment, improving energy utilization rate, and reducing equipment input cost.

Pending Publication Date: 2017-12-26
JIANGSU PROVINCE METALLURGICAL DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current production system cannot realize the differentiated production of the two shaft furnaces. From the perspective of resource utilization, there is a certain problem of low resource utilization.

Method used

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  • Double-shaft-furnace joint production system and method for treating two paths of gas with single bath towers
  • Double-shaft-furnace joint production system and method for treating two paths of gas with single bath towers
  • Double-shaft-furnace joint production system and method for treating two paths of gas with single bath towers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Put vanadium-titanium-magnetite pellets in the first shaft furnace 10, put iron concentrate pellets in the second shaft furnace 20, and the reducing gas volume of the first shaft furnace is 1000Nm 3 / h, the composition ratio is H 2 With a volume ratio of 5 to CO, the effective reducing gas (H 2 +CO) volume ratio ≥ 0.90, the temperature is 1050° C., the pressure reaches 0.7 MPa, react in the first shaft furnace 10 to produce vanadium-titanium sponge iron and the first top gas. The pressure of the first top gas is 0.65MPa after it is passed into the top gas water washing tower 11, and the pressure is adjusted to 0.2MPa at the pressure reducing valve 12, and then this gas enters the mixing tank 14. After the second top gas is passed into the top gas washing tower 11, most of it passes through the CO 2 After removing the device 13, it enters the mixing tank 14, and the remaining small part is used as the fuel gas of the heating furnace 15. The gas volume in the mixing ta...

Embodiment 2

[0072] Put vanadium-titanium-magnetite pellets in the first shaft furnace 10, put iron concentrate pellets in the second shaft furnace 20, and the gas volume of the reducing gas in the first shaft furnace is 1000Nm 3 / h, the composition ratio is H 2 With a volume ratio of 4 to CO, the effective reducing gas (H 2 +CO) volume ratio ≥ 0.90, the temperature is 1000°C, the pressure reaches 0.4MPa, react in the first shaft furnace 10 to produce vanadium-titanium sponge iron and the first top gas. The pressure of the first furnace top gas is 0.3MPa after being passed into the furnace top gas water washing tower 11, and the pressure after water washing is 0.25MPa, and directly enters the mixing tank 14 without decompression. After the second top gas is passed into the top gas washing tower 11, most of it passes through the CO 2 After removing the device 13, it enters the mixing tank 14, and the remaining small part is used as the fuel gas of the heating furnace 15. The gas volume i...

Embodiment 3

[0075] Put vanadium-titanium-magnetite pellets in the first shaft furnace 10, put iron concentrate pellets in the second shaft furnace 20, and the reducing gas volume of the first shaft furnace is 1000Nm 3 / h, the composition ratio is H 2 With a volume ratio of 3 to CO, the effective reducing gas (H 2 +CO) volume ratio ≥ 0.85, the temperature is 1000° C., the pressure reaches 0.5 MPa, react in the first shaft furnace 10 to produce vanadium-titanium sponge iron and the first top gas. The pressure of the first top gas is 0.4MPa after it is passed into the top gas water washing tower 11, and the pressure is adjusted to 0.15MPa at the pressure reducing valve 12, and then the gas enters the mixing tank 14. After the second top gas is passed into the top gas washing tower 11, most of it passes through the CO 2 After removing the device 13, it enters the mixing tank 14, and the remaining small part is used as the fuel gas of the heating furnace 15. The gas volume in the mixing tan...

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Abstract

The invention discloses a double-shaft-furnace joint production system for treating two paths of gas with single bath towers. The system comprises a first shaft furnace, the top gas bath tower, a first pressure reducing device, a CO2 remover, a mixing tank, a heating furnace, a second shaft furnace, the cooling gas bath tower, a second pressure reducing device, a pressure boosting device and connecting pipelines between all the parts. Meanwhile, the invention discloses a method for joint production of iron-containing products with the system. According to the double-shaft-furnace joint production system, the sefstromite shaft furnace and the iron ore concentrate shaft furnace are coupled, the pressure difference of the two shaft furnaces and the H2 / CO ratio difference of two reducing gas ingredients are fully utilized in the production process, pressure and ingredient gradient utilization is realized, the utilization rate of resources and energy is increased, and vanadium-and-titanium-enriched sponge iron and sponge iron products are produced; and in addition, the same bath tower device is adopted according to the design of the two shaft furnaces, matched equipment investment is reduced while top gas and cooling gas are treated, and system equipment is effectively simplified.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular, the invention relates to a combined production system and method of double shaft furnaces for processing two-way gas with a single washing tower. Background technique [0002] Reduction of iron ore with CO and H in a gas-based shaft furnace 2 As a reducing gas, at the same time, the hot reducing gas is the reaction energy supply mode, and the reduction occurs under the condition of lower than the softening temperature of the solid mineral raw material to obtain the sponge iron product. The inside of the shaft furnace is usually divided into three parts from top to bottom, preheating section, reducing section and cooling section. Shaft furnace direct reduction of iron ore concentrate has long been used in large-scale industrial applications. In recent years, there have also been research reports on the use of vanadium-titanium magnetite or vanadium-titanium sea sand ore as raw m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21B13/02C21B13/14
CPCY02P10/122C21B13/02C21B13/0073C21B13/146
Inventor 刘亮邓君范志辉员晓唐敬坤冯鲁兴韩志彪吴道洪
Owner JIANGSU PROVINCE METALLURGICAL DESIGN INST
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