CN109186709B - Method for measuring matte liquid level in oxygen-enriched bottom blowing furnace - Google Patents
Method for measuring matte liquid level in oxygen-enriched bottom blowing furnace Download PDFInfo
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- CN109186709B CN109186709B CN201811042832.4A CN201811042832A CN109186709B CN 109186709 B CN109186709 B CN 109186709B CN 201811042832 A CN201811042832 A CN 201811042832A CN 109186709 B CN109186709 B CN 109186709B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/04—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by dip members, e.g. dip-sticks
Abstract
The invention provides a method for measuring the liquid level of copper matte in an oxygen-enriched bottom blowing furnace, belongs to the field of copper smelting operation of the oxygen-enriched bottom blowing furnace, and aims to solve the problems that workers are easy to burn, potential safety hazards exist, the measuring process is complicated, the accuracy is poor and the like in the conventional method. The measuring rod is used for measuring the slag hole of the oxygen-enriched bottom blowing furnace, so that the characteristic that the liquid level of a slag hole sedimentation area in the furnace is relatively static is fully utilized, the phenomenon that the measuring hole is blocked by splashes is avoided, and the safety factor is higher; the invention can measure at any time in the slag-tapping operation time period, and the measuring time is flexible; the copper matte and the adhesive force between the slag and the measuring rod are different, so that the liquid level of the copper matte can be accurately measured, the liquid level of the copper matte in the oxygen-enriched bottom blowing furnace can be better controlled, the slag and copper discharging operation time can be reasonably arranged, the next procedure can be better served, and an intuitive and referable basis is provided for actual production.
Description
Technical Field
The invention relates to the technical field of copper smelting operation of an oxygen-enriched bottom blowing furnace, in particular to a method for measuring the liquid level of copper matte in the oxygen-enriched bottom blowing furnace.
Background
The smelting in the oxygen-enriched bottom-blown furnace molten pool is a new generation copper smelting technology with independent intellectual property rights in China, and the method has the characteristics of low investment, strong raw material adaptability, energy conservation and the like. The oxygen-enriched bottom-blowing smelting furnace is a rotatable horizontal cylindrical furnace, and oxygen-enriched air is blown into a molten pool through an oxygen lance at the lower part of the molten pool to ensure that the molten poolUnder vigorous stirring. After the mixture in the furnace undergoes a series of physical and chemical changes in the reaction zone, the melt flows towards the slag hole and enters the precipitation zone, so that the separation of copper slag is realized. Because the slag produced by the oxygen-enriched bottom blowing furnace is FeO-SiO2The binary slag type has high copper content, so that the aim of discarding slag once cannot be achieved, how to effectively reduce the copper content of the slag is a problem which is addressed by various manufacturers, and controlling the slag layer and the liquid level of copper matte is an important means for controlling the copper content of the slag in the bottom blowing furnace. Therefore, in the actual smelting process, in order to better control the matte liquid level and the slag liquid level in the bottom blowing furnace, reasonably arrange the slag and copper discharging operation time and better match the next process, the matte liquid level in the oxygen-enriched bottom blowing furnace needs to be measured frequently, so that an intuitive and referable basis is provided for actual production.
At present, when the liquid level of the copper matte in the oxygen-enriched bottom blowing furnace is measured, two modes are generally available: one is to open a detection port above the oxygen-enriched bottom-blowing furnace and insert a detection rod into the detection port for measurement. However, since the measuring point of this method is located near the reaction area in the furnace, the splashing is serious, the detecting port is dangerous, workers are easily burned, potential safety hazards exist, and the method is easy to block, and in addition, the measuring process of the method is complicated and the accuracy is poor. And the other method is to judge the liquid level of the copper matte in the furnace according to the standard of the copper matte brought out by slag discharge at a slag hole, so that the copper content in the slag is increased, and the corrosion of the copper matte on a slag chute is easy to cause.
Disclosure of Invention
The invention aims to solve the technical problems that workers are easy to burn, potential safety hazards exist, the measuring process is complicated, the accuracy is poor, and the corrosion of copper matte to a slag chute is easy to cause due to the fact that the copper content of slag is increased in the conventional method for measuring the liquid level of the copper matte in the oxygen-enriched bottom blowing furnace.
In order to solve the technical problems, the invention adopts the technical scheme that:
a method for measuring the liquid level of matte in an oxygen-enriched bottom blowing furnace comprises the following steps:
step 1, manufacturing a measuring rod, wherein the measuring rod comprises a measuring section AC, an operating section BA and an angle adjusting section BD, the measuring section AC, the operating section BA and the angle adjusting section BD are in the same plane, the lengths of the measuring section AC and the angle adjusting section BD are the same, the included angle between the angle adjusting section BD and the operating section BA and the included angle between the operating section BA and the measuring section AC are both alpha, and the included angle between the angle adjusting section BD and the operating section BA and the included angle alpha between the operating section BA and the measuring section AC are both 120-plus-150 degrees;
step 2, aligning the measuring section AC to the slag hole of the oxygen-enriched bottom-blowing furnace, enabling the measuring section AC to be upward, aligning the measuring section AC to the slag hole of the oxygen-enriched bottom-blowing furnace, enabling the angle adjusting section BD to be vertically downward, inserting the measuring section AC into a melt in the furnace through the slag hole, and adjusting the vertical angle of the measuring section AC so that the measuring section AC enters a furnace molten pool of the oxygen-enriched bottom-blowing furnace through the inner;
step 3, after the measuring section AC completely enters a molten pool in the furnace, rotating the measuring rod by 180 degrees to enable the angle adjusting section BD to be changed from vertical downward to vertical upward, wherein the measuring section AC is downward and vertical to the matte liquid level, raising the point B of the measuring rod, pulling the measuring rod backward gently, stopping pulling when the corner point A of the measuring section AC is in contact with the lower edge of the slag notch inner furnace end wall and the operating section BA is in contact with the lower edge of the slag notch inner furnace end wall, and enabling the measuring rod to enter a measuring position at the moment;
step 4, keeping the position of the measuring rod unchanged, and staying for 15-25 seconds;
step 5, lowering the angle modulation section BD of the measuring rod, pulling the measuring rod out of the oxygen-enriched bottom blowing furnace, and observing attachments on the measuring section AC, wherein the upper layer with thick attachments is a slag layer, and the lower layer with thin attachments is a matte layer;
step 6, calculating the height of the liquid level of the matte in the oxygen-enriched bottom blowing furnace by the following formula: y is H-MCos beta + LCos beta, wherein Y is the height of the copper matte liquid level, H is the distance from the lower edge of the slag notch to the bottom of the molten pool, M is the length of the measuring section AC, L is the length of the copper matte layer on the measuring section AC, beta is the angle formed by the point A of the measuring section AC and the lower edge of the inner furnace end wall of the slag notch, beta is alpha-90-theta, tan theta is a/b, a is the height of the slag notch, and b is the length of the slag notch.
Optionally, the measuring rod is a metal tube, the lengths of the measuring section AC and the angle adjusting section BD of the measuring rod are both 600mm, the length of the operating section BA is 4800mm, and the inner diameter of the measuring rod is 13-18 mm.
The invention has the beneficial effects that:
the measuring rod is used for measuring the slag hole of the oxygen-enriched bottom blowing furnace, so that the characteristic that the liquid level of a slag hole sedimentation area in the furnace is relatively static is fully utilized, the phenomenon that the measuring hole is blocked by splashes is avoided, and the safety factor is higher; the invention can measure at any time in the slag-tapping operation time period, and the measuring time is flexible; the copper matte and the adhesive force between the slag and the measuring rod are different, so that the liquid level of the copper matte can be accurately measured, the liquid level of the copper matte in the oxygen-enriched bottom blowing furnace can be better controlled, the slag and copper discharging operation time can be reasonably arranged, the next procedure can be better served, and an intuitive and referable basis is provided for actual production. Therefore, compared with the background art, the method has the advantages of safe measurement process, no worker burn, no potential safety hazard, accurate measurement result, simple measurement method, flexible measurement time, capability of controlling the liquid level of the copper matte in the furnace within a stable numerical range, capability of reducing the copper content in the furnace slag and the like.
Drawings
Fig. 1 is a schematic view of the structure of the measuring stick of the present invention.
FIG. 2 is a schematic diagram of the present invention for measuring the level of matte.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in figures 1 and 2, the method for measuring the level of copper matte in the oxygen-enriched bottom blowing furnace in the embodiment comprises the following steps:
step 1, manufacturing a measuring rod, wherein the measuring rod comprises a measuring section AC, an operating section BA and an angle adjusting section BD, the measuring section AC, the operating section BA and the angle adjusting section BD are in the same plane, the length of the measuring section AC is the same as that of the angle adjusting section BD, and the included angle between the angle adjusting section BD and the operating section BA and the included angle between the operating section BA and the measuring section AC are both alpha;
step 2, aligning the measuring section AC to the slag hole of the oxygen-enriched bottom-blowing furnace, enabling the measuring section AC to be upward, aligning the measuring section AC to the slag hole of the oxygen-enriched bottom-blowing furnace, enabling the angle adjusting section BD to be vertically downward, inserting the measuring section AC into a melt in the furnace through the slag hole, and adjusting the vertical angle of the measuring section AC so that the measuring section AC enters a furnace molten pool of the oxygen-enriched bottom-blowing furnace through the inner;
step 3, after the measuring section AC completely enters a molten pool in the furnace, rotating the measuring rod by 180 degrees to enable the angle adjusting section BD to be changed from vertical downward to vertical upward, wherein the measuring section AC is downward and vertical to the matte liquid level, raising the point B of the measuring rod, pulling the measuring rod backward gently, stopping pulling when the corner point A of the measuring section AC is in contact with the lower edge of the slag notch inner furnace end wall and the operating section BA is in contact with the lower edge of the slag notch inner furnace end wall, and enabling the measuring rod to enter a measuring position at the moment;
step 4, keeping the position of the measuring rod unchanged, and staying for 15-25 seconds;
step 5, lowering the angle modulation section BD of the measuring rod, pulling the measuring rod out of the oxygen-enriched bottom blowing furnace, and observing attachments on the measuring section AC, wherein the upper layer with thick attachments is a slag layer, and the lower layer with thin attachments is a matte layer;
step 6, calculating the height of the liquid level of the matte in the oxygen-enriched bottom blowing furnace by the following formula: y is H-MCos beta + LCos beta, wherein Y is the height of the copper matte liquid level, H is the distance from the lower edge of the slag notch to the bottom of the molten pool, M is the length of the measuring section AC, L is the length of the copper matte layer on the measuring section AC, beta is the angle formed by the point A of the measuring section AC and the lower edge of the inner furnace end wall of the slag notch, beta is alpha-90-theta, tan theta is a/b, a is the height of the slag notch, and b is the length of the slag notch.
The measuring rod is a metal tube, the lengths of a measuring section AC and an angle adjusting section BD of the measuring rod are both 600mm, the length of an operating section BA is 4800mm, and the inner diameter of the measuring rod is 13-18 mm. Preferably, the measuring rod has an inner diameter of 15 mm.
Optionally, the angle between the angle adjusting section BD and the operating section BA and the angle α between the operating section BA and the measuring section AC are both 120 ° and 150 °. Preferably, the angle α is 135 °.
In the smelting process of smelting copper by the oxygen-enriched bottom-blowing furnace, the slag hole close to the oxygen-enriched bottom-blowing furnace belongs to the tail part of the precipitation area, the stirring is weakest, and the layering effect of the matte and the slag is best, so the position of the slag hole is selected and measured by using the measuring rod. The measurement principle is as follows: because the molten matte in the furnace and the slag have different components, and the temperature of the melt in the furnace at the slag hole is lower, the measuring rod can not deform in a short time, after the measuring rod is inserted into the slag hole, the difference of the adhesive capacity is very large, the measured matte layer almost has no attachments, and the slag layer has obvious attachments. Therefore, the matte level can be determined according to the attachment length of matte and slag on the measuring rod.
Furthermore, in order to verify the accuracy of the matte liquid level in the oxygen-enriched bottom blowing furnace measured by the method provided by the invention, the method can also be used for verifying the actual measurement of the matte liquid level at the smoke outlet under the non-production condition when the oxygen-enriched bottom blowing furnace is rotated out to the furnace stop position. The verification proves that the precision of the measuring method provided by the invention is +/-10 mm.
Combining the above, when the distance H from the lower edge of the slag hole to the bottom of the molten pool is 1250mm, the length of the measuring section AC is 600mm, the length L of the matte layer on the measuring section AC is 500mm, the included angle between the angle adjusting section BD and the operating section BA and the included angle alpha between the operating section BA and the measuring section AC are 135 degrees and theta is 15 degrees, the height Y of the matte liquid level in the oxygen-enriched bottom blowing furnace is 1163.4 mm.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (2)
1. A method for measuring the liquid level of matte in an oxygen-enriched bottom blowing furnace is characterized by comprising the following steps:
step 1, manufacturing a measuring rod, wherein the measuring rod comprises a measuring section AC, an operating section BA and an angle adjusting section BD, the measuring section AC, the operating section BA and the angle adjusting section BD are in the same plane, the lengths of the measuring section AC and the angle adjusting section BD are the same, the included angle between the angle adjusting section BD and the operating section BA and the included angle between the operating section BA and the measuring section AC are both alpha, and the included angle between the angle adjusting section BD and the operating section BA and the included angle alpha between the operating section BA and the measuring section AC are both 120-plus-150 degrees;
step 2, aligning the measuring section AC to the slag hole of the oxygen-enriched bottom-blowing furnace, enabling the measuring section AC to be upward, aligning the measuring section AC to the slag hole of the oxygen-enriched bottom-blowing furnace, enabling the angle adjusting section BD to be vertically downward, inserting the measuring section AC into a melt in the furnace through the slag hole, and adjusting the vertical angle of the measuring section AC so that the measuring section AC enters a furnace molten pool of the oxygen-enriched bottom-blowing furnace through the inner;
step 3, after the measuring section AC completely enters a molten pool in the furnace, rotating the measuring rod by 180 degrees to enable the angle adjusting section BD to be changed from vertical downward to vertical upward, wherein the measuring section AC is downward and vertical to the matte liquid level, raising the point B of the measuring rod, pulling the measuring rod backward gently, stopping pulling when the corner point A of the measuring section AC is in contact with the lower edge of the slag notch inner furnace end wall and the operating section BA is in contact with the lower edge of the slag notch inner furnace end wall, and enabling the measuring rod to enter a measuring position at the moment;
step 4, keeping the position of the measuring rod unchanged, and staying for 15-25 seconds;
step 5, lowering the angle modulation section BD of the measuring rod, pulling the measuring rod out of the oxygen-enriched bottom blowing furnace, and observing attachments on the measuring section AC, wherein the upper layer with thick attachments is a slag layer, and the lower layer with thin attachments is a matte layer;
step 6, calculating the height of the liquid level of the matte in the oxygen-enriched bottom blowing furnace by the following formula: y is H-MCos beta + LCos beta, wherein Y is the height of the copper matte liquid level, H is the distance from the lower edge of the slag notch to the bottom of the molten pool, M is the length of the measuring section AC, L is the length of the copper matte layer on the measuring section AC, beta is the angle formed by the point A of the measuring section AC and the lower edge of the inner furnace end wall of the slag notch, beta is alpha-90-theta, tan theta is a/b, a is the height of the slag notch, and b is the length of the slag notch.
2. The method for measuring the level of matte in an oxygen-enriched bottom-blowing furnace as claimed in claim 1, wherein the measuring rod is a metal tube, the length of the measuring section AC and the length of the angle adjusting section BD of the measuring rod are both 600mm, the length of the operating section BA is 4800mm, and the inner diameter of the measuring rod is 13-18 mm.
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| CN201811042832.4A CN109186709B (en) | 2018-09-07 | 2018-09-07 | Method for measuring matte liquid level in oxygen-enriched bottom blowing furnace |
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| CN201811042832.4A CN109186709B (en) | 2018-09-07 | 2018-09-07 | Method for measuring matte liquid level in oxygen-enriched bottom blowing furnace |
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| CN109186709B true CN109186709B (en) | 2020-10-30 |
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Address after: 043700 Dongfeng mountain, Xincheng Town, Yuanqu County, Yuncheng City, Shanxi Province Patentee after: Shanxi North Copper Co.,Ltd. Address before: 043700 Dongfeng Mountain, Yuanqu County, Yuncheng City, Shanxi Province Patentee before: Northern Copper Industrial Co. |
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