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Method for Obtaining the Pipe Diameter of Desulfurizing Agent for Molten Iron Injection Desulfurization

A desulfurizing agent and conveying pipe technology is applied in the field of obtaining the desulfurizing agent conveying pipe diameter for molten iron injection desulfurization, which can solve the problem that the desulfurizing agent conveying pipe diameter may not be suitable.

Active Publication Date: 2020-06-19
WISDRI ENG & RES INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the physical properties (density, particle size distribution, viscosity, etc.) influences
When there is a large deviation between the above-mentioned conditions of the target object and the applicable range of the empirical formula, or when there are no similar engineering pipeline parameters for reference, the desulfurizer delivery pipe diameter determined in this way may not be applicable

Method used

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  • Method for Obtaining the Pipe Diameter of Desulfurizing Agent for Molten Iron Injection Desulfurization
  • Method for Obtaining the Pipe Diameter of Desulfurizing Agent for Molten Iron Injection Desulfurization
  • Method for Obtaining the Pipe Diameter of Desulfurizing Agent for Molten Iron Injection Desulfurization

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Embodiment 1

[0045] Such as figure 1 , an embodiment of the present invention provides a method for obtaining the diameter of a desulfurizing agent delivery pipe for molten iron injection desulfurization, comprising the following steps:

[0046] Step 1, according to the molten iron injection desulfurization process requirements and desulfurizer conditions, determine the consumption of desulfurizer W p and injection time t, and calculate the delivery mass flow rate G of the corresponding desulfurizer particles according to the following formula s :

[0047]

[0048] Among them, the above-mentioned molten iron injection desulfurization process requirements are easily determined by those skilled in the art according to the working conditions, including the initial sulfur content of molten iron, the final sulfur content, the utilization rate level of desulfurizer, the temperature of molten iron and the amount of molten iron charged; the above-mentioned desulfurization Agent conditions inc...

Embodiment 2

[0067] This embodiment provides a method for obtaining the safe injection intensity of molten iron pretreatment injection gas, which can be used in the first embodiment above, and determines the solid-gas ratio m of desulfurization agent delivery according to the obtained safe injection intensity of molten iron injection desulfurization The minimum value of m min .

[0068] Such as Figure 4 , the method for obtaining the safe injection intensity of molten iron pretreatment injection gas comprises the steps:

[0069] S100, obtaining the condition of the molten iron tank, the injection condition and the medium condition;

[0070] S200, calculate and obtain the required gas flow rate Q injected into the molten metal pool according to the medium condition v ;

[0071] S300, according to the formula I=Q v / W calculates and obtains current injection intensity I, and wherein, W is the molten iron charge in the described medium condition;

[0072] S400, according to the conditi...

Embodiment 3

[0087] This embodiment describes the method for obtaining the diameter of the desulfurizing agent delivery pipe for injection desulfurization of molten iron provided in the first embodiment according to the actual production conditions.

[0088] Step 1: Given the technical requirements of molten iron injection desulfurization and desulfurizing agent conditions, the initial sulfur content of molten iron is 350ppm, the final sulfur content required by the process is 50ppm, the utilization rate of desulfurizing agent is 11.7%, the temperature of molten iron is 1350°C, and the molten iron The loading capacity is 150t, the desulfurization agent is lime powder, the active ingredient of CaO is 90%, the average particle size is 0.5mm, and the consumption of desulfurization agent is W p is 750kg, and the injection time is 10 minutes, then the transport mass flow rate G of desulfurizer particles can be calculated according to the following formula s 75kg / min,

[0089]

[0090] Step ...

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Abstract

The invention relates to a method for obtaining a desulfurizing agent conveying pipe diameter for molten iron blowing desulfurization. The method includes the following steps that consumption W andblowing time t of a desulfurizing agent are determined according to molten iron blowing desulfurization process requirements and desulfurizing agent conditions, and a corresponding conveying mass flow rate G<s> of desulfurizing agent particles is calculated; the suitable range of a desulfurizing agent conveying solid-gas ratio m is determined according to the molten iron blowing desulfurization process requirements and physical properties of the desulfurizing agent; the range of a carrier gas mass flow rate G<g> is calculated based on the determined suitable range of the solid-gas ratio m; the range of the inner diameter d<n> of a nozzle of a spray gun is calculated; the range of gas flow velocity U<e> of a desulfurizing agent conveying pipeline terminal is determined; and the suitable range of the desulfurizing agent conveying pipe diameter D is obtained through calculation according to a calculation formula (please see the specification for the formula). By means of the method, thesuitable range, matched with actual onsite conditions, of the desulfurizing agent conveying pipe diameter can be obtained scientifically and reasonably according to influence rules of actual process requirements of molten iron blowing desulfurization, desulfurization reaction dynamics conditions and the physical properties of the desulfurizing agent on desulfurizing agent conveying parameters.

Description

technical field [0001] The invention belongs to the technical field of molten iron pretreatment, and in particular relates to a method for obtaining the diameter of a desulfurizing agent delivery pipe for injection desulfurization of molten iron. Background technique [0002] The desulfurization agent injection delivery pipeline, as a bridge connecting the desulfurization agent injection tank and the spray gun, is crucial to the molten iron injection desulfurization process. [0003] Whether the selection of the pipeline diameter is reasonable or not will have a decisive effect on the uniformity and stability of the desulfurizer delivery process: [0004] When the selected value of the delivery pipe diameter is too small, on the one hand, the decrease of the delivery pipe diameter will increase the pressure loss in the desulfurizer delivery process, thereby increasing the power loss in the injection process; The desulfurization dose can meet the process requirements, so the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/02C21C7/064G16C20/10
CPCC21C1/02C21C7/064
Inventor 陈洪智
Owner WISDRI ENG & RES INC LTD