阅读说明：本技术 一种判断转炉炼铜终点时间的方法 (Method for judging converter copper smelting end point time ) 是由 李大为 王鹏 佟亮 于 2020-07-22 设计创作，主要内容包括：本发明公开的属于转炉炼铜技术领域,具体为一种判断转炉炼铜终点时间的方法,该判断转炉炼铜终点时间的方法的具体步骤如下：S1：对入炉冰铜提前取样分析：当冰铜从上道工序排出后装入冰铜包中,同时对冰铜取样送化验室分析其中铜含量、铁含量、硫含量；S2：计算出第一周期的目标时间和熔剂加入量；S3：计算出第二周期的目标时间和熔剂加入量。可实现连续检测并连续计算吹炼终点时间判断,为操作者提供可靠的数据,从而提高转炉的利用率减少不必要的摇炉操作。节约大量吹炼时间,提高入炉风量的利用率的同时减少了空气的排空量达到了节约能源的目的,保证吹炼生产的连续进行。(The invention belongs to the technical field of converter copper smelting, and particularly relates to a method for judging converter copper smelting end point time, which comprises the following specific steps: s1: sampling and analyzing the furnace entering matte in advance: when the copper matte is discharged from the previous working procedure, putting the copper matte into a copper matte package, and simultaneously, sampling the copper matte and sending the copper matte to a laboratory for analyzing the copper content, the iron content and the sulfur content; s2: calculating the target time and the flux addition amount of the first period; s3: and calculating the target time of the second period and the adding amount of the flux. The method can realize continuous detection and continuous calculation of the blowing end time judgment, and provide reliable data for operators, thereby improving the utilization rate of the converter and reducing unnecessary furnace swinging operation. Saves a large amount of converting time, improves the utilization rate of the air quantity entering the furnace, reduces the emptying quantity of the air, achieves the aim of saving energy, and ensures the continuous operation of converting production.)

1. A method for judging the end point time of copper smelting in a converter is characterized by comprising the following steps: the method for judging the copper smelting end point time of the converter comprises the following specific steps:

s1: sampling and analyzing the furnace entering matte in advance: when the copper matte is discharged from the previous working procedure and then is filled into a copper matte, the copper matte is sampled and sent to a laboratory for analysis of the copper content, the iron content and the sulfur content, the mass of the copper matte in the copper matte is obtained through a crane weighing system, and the next step is carried out after the data are obtained;

s2: calculating the target time and the flux addition amount of the first period:

taking: and (4) calculating the weight Nt of the copper matte according to the copper content A, the iron content B, the sulfur content C and the iron-silicon ratio D obtained in the step S1 by using a formula to obtain:

the content Kg of the iron matte is Nt 1000 of the weight of the iron matte and B%/100 of the iron matte;

the oxygen mol amount Kmol ═ iron content Kg/55.85 × 1.5 required by the copper matte;

the oxygen amount Nm required for copper matte³Oxygen molar weight Kmol 22.4;

air quantity Nm required for copper matte³Amount of oxygen Nm³/0.205；

Calculating the air and oxygen demand according to the data to respectively obtain: air demand and oxygen demand;

according to the calculation of the iron-silicon ratio of the test data, the following results are obtained:

solvent quartz stone requirement Kg ═ iron content Kg/iron-silicon ratio D

The actual flow rates of air and oxygen blown into the converter were measured by flow meters, and from the above parameters the following data were calculated:

theoretical total air demand/(oxygen factor 200+ air factor 10000 × 0.205);

wherein the air coefficient and the oxygen coefficient are theoretical values set according to the real air flow and the oxygen flow

Actual treatment time ═ (air demand-oxygen cumulative amount)/(theoretical oxygen value + actual air value 0.205);

the accumulated oxygen amount is obtained by performing accumulated calculation through a flowmeter, and the oxygen accumulated amount can be judged not to participate in calculation under the state when the air amount blown into the converter is smaller than a certain value in the formula;

s3: calculating the target time of the second period and the addition amount of the flux:

removing the impurity sulfur in the copper matte by adopting the sampling analysis result of the step S1 and the measuring and calculating mode in the step S2, calculating the content of the impurity sulfur in the copper matte, then calculating the air quantity and the oxygen quantity required by the reaction, and calculating the time required by the impurity sulfur after the impurity sulfur is completely reacted according to the actual gas flow blown into the converter:

the basic calculation method is as follows:

the sulfur content Kg of the matte is 1000 Kg of the weight of the matte and the sulfur content C;

the molar amount of oxygen Koml required for copper matte (sulfur content C%/32-iron content B%/55.85);

required oxygen Nm for copper matte³Oxygen molar mass Koml 22.4;

air demand Nm required for matte³Oxygen demand Nm³/0.205；

According to the parameters, the actual air and oxygen flow is combined, and the end time value of the converting period can be calculated by the preset second period air and oxygen coefficients:

theoretical time oxygen demand/(oxygen coefficient + air coefficient 0.205)

The remaining time (oxygen demand-accumulated oxygen amount)/(actual oxygen + actual air flow 0.205)

The oxygen accumulation amount is gradually increased along with the time, the remaining time is gradually reduced along with the progress of the converting process, and copper can be selected according to the actual condition until the remaining time is close to 0, so that the whole process is finished.

Technical Field

The invention relates to the technical field of converter copper smelting, in particular to a method for judging the end point time of converter copper smelting.

Background

The converter copper smelting process mainly comprises the steps of mixing blown air and oxygen, oxidizing impurity iron in copper matte in a converter into slag, judging the amount of the slag by observing states such as slag surface thickness, reaction degree and melt brightness on the surface of a melt in the converter by an operator, discharging the slag into a slag bag through a furnace opening, entering a second period after the slag in the converter is discharged, and finally pouring the melt in the converter into a copper clad after judging a converting terminal point by the operator by observing smoke gas amount, melt temperature, melt reaction state and the like in the converter to complete the whole converting process.

This in-process need be got the sediment sample at any time and sent the laboratory with the matte sample to carry out the chemical examination, and the operator is fed back to the very first time after the chemical examination result is obtained, and operator adjusts the addition of converting time and solvent at any time through the chemical examination result. In the process, because the reaction state in the furnace can not be accurately predicted, the slag tapping time and the end point time are completely judged by the experience of operators when arriving, and precious smelting time is wasted by repeatedly shaking the furnace, sampling and the like.

Disclosure of Invention

The invention aims to provide a method for judging the end point time of copper smelting in a converter, which aims to solve the problems that the precious smelting time is wasted due to the fact that the reaction state in the converter cannot be accurately predicted, the slag tapping time and the end point time are judged completely through the experience of operators when the slag tapping time and the end point time arrive, and the converter is repeatedly shaken for sampling.

In order to achieve the purpose, the invention provides the following technical scheme: a method for judging the end point time of copper smelting in a converter comprises the following specific steps:

s1: sampling and analyzing the furnace entering matte in advance: when the copper matte is discharged from the previous working procedure and then is filled into a copper matte, the copper matte is sampled and sent to a laboratory for analysis of the copper content, the iron content and the sulfur content, the mass of the copper matte in the copper matte is obtained through a crane weighing system, and the next step is carried out after the data are obtained;

s2: calculating the target time and the flux addition amount of the first period:

taking: and (4) calculating the weight Nt of the copper matte according to the copper content A, the iron content B, the sulfur content C and the iron-silicon ratio D obtained in the step S1 by using a formula to obtain:

the content Kg of the iron matte is Nt 1000 of the weight of the iron matte and B%/100 of the iron matte;

the oxygen mol amount Kmol ═ iron content Kg/55.85 × 1.5 required by the copper matte;

the oxygen amount Nm required for copper matte³Oxygen molar weight Kmol 22.4;

air quantity Nm required for copper matte³Amount of oxygen Nm³/0.205；

Calculating the air and oxygen demand according to the data to respectively obtain: air demand and oxygen demand;

according to the calculation of the iron-silicon ratio of the test data, the following results are obtained:

solvent quartz stone requirement Kg ═ iron content Kg/iron-silicon ratio D

The actual flow rates of air and oxygen blown into the converter were measured by flow meters, and from the above parameters the following data were calculated:

theoretical total air demand/(oxygen factor 200+ air factor 10000 × 0.205);

wherein the air coefficient and the oxygen coefficient are theoretical values set according to the real air flow and the oxygen flow

Actual treatment time ═ (air demand-oxygen cumulative amount)/(theoretical oxygen value + actual air value 0.205);

the accumulated oxygen amount is obtained by performing accumulated calculation through a flowmeter, and the oxygen accumulated amount can be judged not to participate in calculation under the state when the air amount blown into the converter is smaller than a certain value in the formula;

s3: calculating the target time of the second period and the addition amount of the flux:

removing the impurity sulfur in the copper matte by adopting the sampling analysis result of the step S1 and the measuring and calculating mode in the step S2, calculating the content of the impurity sulfur in the copper matte, then calculating the air quantity and the oxygen quantity required by the reaction, and calculating the time required by the impurity sulfur after the impurity sulfur is completely reacted according to the actual gas flow blown into the converter:

the basic calculation method is as follows:

the sulfur content Kg of the matte is 1000 Kg of the weight of the matte and the sulfur content C;

the molar amount of oxygen Koml required for copper matte (sulfur content C%/32-iron content B%/55.85);

required oxygen Nm for copper matte³Oxygen molar mass Koml 22.4;

copper matte stationAir demand Nm³Oxygen demand Nm³/0.205；

According to the parameters, the actual air and oxygen flow is combined, and the end time value of the converting period can be calculated by the preset second period air and oxygen coefficients:

theoretical time oxygen demand/(oxygen coefficient + air coefficient 0.205)

The remaining time (oxygen demand-accumulated oxygen amount)/(actual oxygen + actual air flow 0.205)

The oxygen accumulation amount is gradually increased along with the time, the remaining time is gradually reduced along with the progress of the converting process, and copper can be selected according to the actual condition until the remaining time is close to 0, so that the whole process is finished.

Compared with the prior art, the invention has the beneficial effects that:

the method relates to real-time flow detection, so the method can be realized by programming the program into a PLC or DCS program. Because the air holes of the converter need to be cleaned at variable time and the flow rate of the converter is changed, the method can realize continuous detection and continuous calculation of the time judgment of the blowing end point, and provide reliable data for operators, thereby improving the utilization rate of the converter and reducing unnecessary furnace swinging operation. Saves a large amount of converting time, improves the utilization rate of the air quantity entering the furnace, reduces the emptying quantity of the air, achieves the aim of saving energy, and ensures the continuous operation of converting production.

Drawings

FIG. 1 is a flow chart of the method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, the present invention provides a technical solution: a method for judging the end point time of copper smelting in a converter comprises the following specific steps:

s1: sampling and analyzing the furnace entering matte in advance: when the copper matte is discharged from the previous working procedure and then is filled into a copper matte, the copper matte is sampled and sent to a laboratory for analysis of the copper content, the iron content and the sulfur content, the mass of the copper matte in the copper matte is obtained through a crane weighing system, and the next step is carried out after the data are obtained;

s2: calculating the target time and the flux addition amount of the first period:

taking: and (4) calculating the weight Nt of the copper matte according to the copper content A, the iron content B, the sulfur content C and the iron-silicon ratio D obtained in the step S1 by using a formula to obtain:

the content Kg of the iron matte is Nt 1000 of the weight of the iron matte and B%/100 of the iron matte;

the oxygen mol amount Kmol ═ iron content Kg/55.85 × 1.5 required by the copper matte;

the oxygen amount Nm required for copper matte³Oxygen molar weight Kmol 22.4;

air quantity Nm required for copper matte³Amount of oxygen Nm³/0.205；

Calculating the air and oxygen demand according to the data to respectively obtain: air demand and oxygen demand;

according to the calculation of the iron-silicon ratio of the test data, the following results are obtained:

solvent quartz stone requirement Kg ═ iron content Kg/iron-silicon ratio D

The actual flow rates of air and oxygen blown into the converter were measured by flow meters, and from the above parameters the following data were calculated:

theoretical total air demand/(oxygen factor 200+ air factor 10000 × 0.205);

wherein the air coefficient and the oxygen coefficient are theoretical values set according to the real air flow and the oxygen flow

Actual treatment time ═ (air demand-oxygen cumulative amount)/(theoretical oxygen value + actual air value 0.205);

the accumulated oxygen amount is obtained by performing accumulated calculation through a flowmeter, and the oxygen accumulated amount can be judged not to participate in calculation under the state when the air amount blown into the converter is smaller than a certain value in the formula;

s3: calculating the target time of the second period and the addition amount of the flux:

removing the impurity sulfur in the copper matte by adopting the sampling analysis result of the step S1 and the measuring and calculating mode in the step S2, calculating the content of the impurity sulfur in the copper matte, then calculating the air quantity and the oxygen quantity required by the reaction, and calculating the time required by the impurity sulfur after the impurity sulfur is completely reacted according to the actual gas flow blown into the converter:

the basic calculation method is as follows:

the sulfur content Kg of the matte is 1000 Kg of the weight of the matte and the sulfur content C;

the molar amount of oxygen Koml required for copper matte (sulfur content C%/32-iron content B%/55.85);

required oxygen Nm for copper matte³Oxygen molar mass Koml 22.4;

air demand Nm required for matte³Oxygen demand Nm³/0.205；

According to the parameters, the actual air and oxygen flow is combined, and the end time value of the converting period can be calculated by the preset second period air and oxygen coefficients:

theoretical time oxygen demand/(oxygen coefficient + air coefficient 0.205)

The remaining time (oxygen demand-accumulated oxygen amount)/(actual oxygen + actual air flow 0.205)

The oxygen accumulation amount is gradually increased along with the time, the remaining time is gradually reduced along with the progress of the converting process, and copper can be selected according to the actual condition until the remaining time is close to 0, so that the whole process is finished.