• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a procedure for the analysis of samples of metal melt, wherein a sample is taken from a metal melt by means of a sampler constructed as a dip lance with sample space. The procedure consists in that the sample from the sampler is transported through a transport line to the working zone of an anylyse installation and that there the sample is analyzed by means of the analysis installation.
    公开号:BE1020242A3
    申请号:E2011/0282
    申请日:2011-05-10
    公开日:2013-07-02
    发明作者:
    申请人:Heraeus Electro Nite Int；
    IPC主号:
    专利说明:

    Procedure and installation for the analysis of samples of metal melt
    The invention relates to a procedure for the analysis of samples of metal melt, wherein a sample is taken from the metal melt by means of a sampler constructed as a submersible lens with sample space. The invention further relates to an installation for sampling in metal melt with a sampler built as a immersion lens with sample space, the installation being suitable in particular for carrying out the procedure according to the invention.
    In metal melting processes, and in particular in the production of cast iron or steel, regular analyzes of the melt are needed. In addition, because of the profitability of the procedure, it is necessary that the analyzes can be carried out as quickly as possible, in order to adjust the control of the process in time if necessary.
    Procedures for analyzing samples are known, for example, from EP 563 447 B1. With the technique described here, the nitrogen content in metal melt can be determined. Similar installations and procedures are known from EP 307 430 B1. With the installation described here, in particular the hydrogen content in metal melt can be analyzed. WO 2005/059527 A1 publishes metal melt analysis procedures and installations that work with one-off spectrometers. US 4,342,633 discloses immersion probes for single use, with which the temperature and the oxygen content of metal melt can be determined. JP 307 1057 A describes an installation for sampling steel melt, wherein the sample is taken with the help of a dip lance and wherein the sample is brought into a hermetically sealed space when the lance is withdrawn from the metal melt. DE 33 44 944 A1 discloses the procedure for taking samples, transporting them to the analysis laboratories and performing the analysis there. In addition, a spectrum analytical investigation of metallurgical immersion samples from DE 32 00 010 A1 is known. In particular, the sample is thereby kept under a vacuum atmosphere or an inert gas atmosphere to prevent oxidation of the hot sample.
    It is the intention of this invention to shorten the time between the sampling and the analysis even more and thereby avoid deviations from the sample.
    This assignment is fulfilled by the invention with the features of the independent claims. The advantageous further elaborations of the inventions are described in the subclaims. The procedure according to the invention for the analysis of samples of metal melt, and in particular of cast iron or steel melt, in which a sample is taken from a metal melt with the aid of a sampler constructed as a dom pellet with sample space. that the sample from the sampler is transported through a transport line to the working zone of an analysis installation and that the sample is analyzed there by means of the analysis installation. The analysis installation can in particular be a spectrometer. The sample is then immediately transported from the immersion lance into the (immediately adjacent to the immersion lance) transport line and from there to the analysis installation, so that in the first place fast transport is guaranteed and secondly external influences on the sample are largely eliminated. . The transport line can be built as a tubular post installation. The sample can preferably be divided into several (for example 2 to 4) solid parts, whereby the division can already take place in the sampler and parts of the sample can be transported to the working area of the analysis installation. Preferably, the sample can also be connected to a part of the sample space that can be removed from the entire sample space and be transported with this part to the working zone of the analysis installation. It can also be advantageous for the sample, together with the sample space, to be transported through the transport line to the working zone of the analysis installation, for part of the sample space to be removed there and for the surface of the sample released thereby to be analyzed. It may be particularly useful for the sample to be exposed to vacuum or inert gas during transit through the transport line. It may also be advantageous for the vacuum atmosphere or the inert gas to be created at least in the sample space prior to sampling and to be retained until the sample has cooled to a maximum temperature of 400 ° C. The transport of the sample can preferably be carried out by means of compressed gas. Transport under vacuum (where the sample is sucked in) is also possible. As the compressed gas, an inert gas (e.g. argon) can be used, which optionally can be replaced by compressed air when the sample has cooled to a temperature of 400 ° C at most.
    The installation according to the invention for sampling in metal melt with a sampler with a sample space constructed as a dip lance is characterized in that the sample space is accommodated in a pattern, that the sampler with a first end with a transport line for a pattern with the sample or the sample space in which the sample is located is connected and that a second end of the transport line is connected to an analysis installation. The pattern is adapted with its outer circumference to the inner circumference of the immersion lance and the immediately following transport line and serves for transporting the sample space. The cartridge can be integrated in the sample space, for example when the sample space with its outer circumference is adapted to the inner circumference of the immersion lance and the transport line. The analysis installation can in particular be a spectrometer. It is useful that the sample space or part thereof can be detached from the sampler and transported through the transport line. Furthermore, it is advantageous for the transport line to be equipped with a connection for compressed gas and / or a connection for vacuum. Furthermore, it is useful that the sample space and / or the cartridge is equipped with a connection for vacuum or a connection for inert gas. With the installation according to the invention, rapid sampling and transport of the sample to an analysis installation is possible, without the sample being exposed to harmful external influences in the meantime.
    The invention is explained in more detail below with reference to exemplary embodiments shown in drawings.
    Shows in the drawing
    Figure 1 the schematic representation of a sampling and measuring installation Figure 2 a comparable representation of the sampling and measuring installation Figure 3 the sampler and the transport of the sample and Figure 4 another sampler
    In figure 1 a melting vessel 1 for steel melt is shown, in which a dip lance 2, which serves as a sampler, is immersed. At the immersion end of the immersion lance there is a sample space 3. The sample space 3 is a so-called "Lollipop" sample space, a flat sample space with an elliptical cross-section, which is provided with a run-in 4 on its immersion side. The sample space 3 is fixed in a cartridge 5.
    With this pattern 5, the sample space 3 is transported by the immersion lance 2 and the immediately following transport line 6 to a spectrometer 7, which serves as an analysis installation. Figure 2 shows a very similar arrangement, in which the spectrometer 7 is shown with its spark position 8. In the arrangements shown in the figures, the sample space 3 is opened after its arrival at the spectrometer 7. The inert gas supplied to the sample chamber 3 is withdrawn before immersion in the steel melt. The supply of inert gas to the sample space 3 takes place in the known manner, as shown in DE 32 00 010 A1. The inert gas, which can also be replaced by vacuum, prevents the liquid steel sample or the cooled steel sample from oxidizing at high temperatures.
    When the sample reaches the spectrometer 7, its temperature has already dropped far below 400 ° C, so that the inert gas or the vacuum for protecting the sample is no longer needed. When the sample space 3 arrives at the spectrometer 7, it is opened. This opening can also be effected, inter alia, by the kinetic force of the sample, but also mechanically by the opening of the two half-shells of the sample space 3 by means of a spring or by means of a manipulator, for example by means of a separation disc or by the effect. of compressed air. By detaching at least one of the two half-shells from the sample space 3, a surface of the sample becomes accessible for analysis. Since sampling and transport of the sample were carried out under inert gas (for example, argon), oxidation is prevented, so that the sample does not have to be freed from oxidation in an appropriate manner for the analysis. This means that the sample no longer needs to be prepared for the analysis.
    A similar supply of the sample to an analysis installation is done very quickly and directly, without intermediate steps, whereby the sample must be transported via a different transport route. Due to the connection of the transport line 6 with the immersion lance 2 and the analysis installation, the use of a large analysis installation to be used in the immediate vicinity of the melt is superfluous. In practice, the analysis can be performed within less than two minutes, since the transport is very fast and starts immediately after sampling. In addition, an automatic sample identification is required, whereby the process analysis can be improved. The analysis installation can be installed in a mobile laboratory or in a fixed laboratory, for example in a central laboratory. Such laboratories are widely available in steel mills.
    In the figures, the sample space 3 is represented as a flat sample space, which is fixed in a cartridge 5. The immersion lance 2 has a round inner diameter, which seamlessly connects to the equally round and equally large inner diameter of the transport line 6, so that the cartridge 5 with its equally round outer diameter can be transported without any problems. Instead of a flat sample space, it is also conceivable that a sample space with a round diameter (perpendicular to the direction of transport) is used. In that case the pattern is in practice the same as the outer envelope of the sample space 3, so that the pattern is immediately integrated in the sample space 3.
    The transport from the sample space 3 to the analysis installation, which for example consists of the aforementioned spectrometer 7, is carried out by means of compressed air. This is shown in figure 3 in two movement phases of the sample space 3. The immersion lance 2 merges seamlessly with its end, not shown in Figure 3, into the transport line 6. Compressed air lines are arranged within the wall of the immersion lance 2 and optionally the transport line 6, with which a gas can be pressed against the immersion side of the cartridge 5 under sufficiently high pressure, so that it is transported in the direction of the analysis installation. The free-standing cross-section of the cartridge 5 can be closed for practical reasons, for example on the side of the cartridge 5 facing the immersion end with a disc of refractory material, so that the gas pressure can transport the sample space 3 in an efficient manner. In the immersion position of the sample space 3, figure 3 shows the protective caps 10 placed at the inflow opening 4 of the sample space 3, which caps melt or are dissolved when immersed in the steel melt, after which the steel melt can flow into the sample space 3.
    Figure 4 shows another possible embodiment of the invention. In the lower part of the image, the immersion lance 2 and in the upper part of the image, the transport line 6 terminating in the analysis installation is shown. The sample space 3 'is formed as a flat sample space, the largest dimension of which extends perpendicular to the immersion direction. The sample space 3 "is equipped at its end remote from the immersion end with a removable cover 11, which is removed at the spectrometer 7 after the arrival of the sample space 3". The spectrometer 7 is provided with a spark position, with which the sample is analyzed on its freely accessible surface after removal of the cover 11. The analysis installation is provided with a gas supply 12. A gas line 13 is provided for the supply of the inert gas pressure gas to the immersion end of the immersion lance. There is also a gas supply line 14 for supplying inert gas to the sample space. The sample space itself is filled by means of a supply tube 15 of quartz glass.
    The individual parts of the installation are made from the materials that are usually used with samplers.
    权利要求:
    Claims (15)
    [1]
    Procedure for the analysis of samples from metal melt, wherein a sample is taken from a metal melt using a sampler constructed as a dip lance with sample space and characterized in that the sample from the sampler passes through a transport line to the working zone of an analysis installation is transported, where the sample is analyzed by the analysis installation.
    [2]
    Procedure according to claim 1, characterized in that a spectrometer is used as the analysis installation.
    [3]
    The procedure according to claim 1 or 2, characterized in that the sample is shared in the sample space and that samples are transported to the working zone of an analysis installation.
    [4]
    The procedure according to claim 1 or 2, characterized in that the sample is connected to a part that can be detached from the entire sample space and is transported together with that part to the working area of the analysis installation.
    [5]
    The procedure according to claim 1 or 2, characterized in that the sample is transported with the sample space through the transport line to the working zone of the analysis installation, that a part of the sample space is removed there and that the surface released thereby sample is analyzed.
    [6]
    The procedure according to any of claims 1 to 5, characterized in that the sample is exposed to vacuum or inert gas during transport of the sample through the transport line.
    [7]
    Procedure according to one of claims 1 to 6, characterized in that a vacuum or inert gas is created at least in the sample chamber before sampling.
    [8]
    The procedure according to any of claims 1 to 7, characterized in that a vacuum or inert gas is created at least in the sample space and that this situation is maintained until the sample is at a temperature of at most 400 ° C has cooled.
    [9]
    The procedure according to any of claims 1 to 8, characterized in that the sample is transported with the aid of compressed gas.
    [10]
    The procedure according to claim 9, characterized in that an inert gas is used as the compressed gas, which optionally can be replaced by compressed air when the sample has cooled to a temperature of 400 ° C at most.
    [11]
    An installation for sampling in metal melt, with a sampler built as a dip lance with sample space, characterized in that the sample space is accommodated in a cartridge, that the sampler with a first end on a transport line for the cartridge with the sample or the sample compartment in which the sample is located, is connected and that a second end of the transport line is connected to an analysis installation.
    [12]
    Installation according to claim 11, characterized in that the analysis installation is a spectrometer.
    [13]
    Installation according to claim 11 or 12, characterized in that the sample space or a part thereof can be detached from the sampler and can be transported through the transport line.
    [14]
    Installation according to one of claims 11 to 13, characterized in that the transport line is equipped with a compressed gas connection or a vacuum connection.
    [15]
    Installation according to any of claims 11 to 14, characterized in that the sample space or cartridge is equipped with a vacuum connection or an inert gas connection.
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    法律状态:
    2020-02-05| MM| Lapsed because of non-payment of the annual fee|Effective date: 20190531 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102010053710|2010-12-07|
    DE102010053710A|DE102010053710B4|2010-12-07|2010-12-07|Method and device for analyzing samples of molten metal|
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