Pig iron analysis sample drilling method

Abstract

The invention discloses a pig iron analysis sample drilling method which comprises the following steps: respectively processing an upper plane and a lower plane which are parallel to each other on the upper surface and the lower surface of a pig iron, drilling a sampling hole in the upper plane and / or the lower plane through a drill bit, taking out scrap iron, and taking the scrap iron as a component detection sample. According to the pig iron analysis sample drilling method provided by the invention, the sample preparation efficiency is improved, the sample preparation cost is reduced, and the accuracy and stability of a detection result are improved.

Description

Technical Field

[0001] The invention relates to the field of metallurgical detection, and in particular to a method for drilling analysis samples of pig iron blocks. Background Art

[0002] At present, most steel enterprises use the drilling method to extract the sample of the pig iron block purchased from the factory, that is, drilling holes in the pig iron block through a drilling machine and drilling iron filings as the sample of the composition test. Since the top and both ends of the pig iron block are arc-shaped, the surface is full of pores and is relatively hard, with many impurities (high content of sediment, oxides and harmful elements such as phosphorus, sulfur, lead, zinc, etc.), if it is not treated and the sample is directly drilled, there will be the following disadvantages:

[0003] 1) Due to the arc shape of the surface, the drill bit is easy to slip during the drilling process, which may damage the drill bit and even cause injury to people. It needs to be adjusted and reinforced repeatedly, which is time-consuming and laborious.

[0004] 2) Due to the large number of pores on the surface of the pig iron block, the drill bit is unevenly stressed, which can easily damage the drill bit. The drill bit needs to be replaced frequently, which is time-consuming and laborious, and the sample preparation cost is high;

[0005] 3) Due to the hard surface of the pig iron block, the drill cannot be used or can only drill samples about 2 to 3 mm from the surface. The oxidation rate of iron chips is high, and the representativeness and uniformity of the samples are poor, resulting in distorted test results and misleading production;

[0006] 4) Affected by the impurities on the surface of the pig iron block, if the drilling depth is not enough, more of the surface and less of the middle part will be collected, and the sample will not be representative, resulting in poor accuracy and stability of the test results. There will be frequent re-inspections, and the difference between the re-inspection results and the factory results will be large, leading to major disputes between the supply and demand sides, seriously affecting the stability of the supply channels. Summary of the invention

[0007] The purpose of the invention is to provide a method for drilling analysis samples of pig iron blocks, which can improve sample preparation efficiency, reduce sample preparation costs, and improve the accuracy and stability of test results.

[0008] To achieve the above-mentioned purpose, the present invention provides a method for drilling analysis samples of pig iron blocks, wherein upper and lower planes parallel to each other are respectively processed on the upper and lower surfaces of the pig iron block, sampling holes are drilled on the upper and / or lower planes by a drill bit, and iron filings are taken out, and the iron filings are used as samples for component detection.

[0009] As a further improvement of the present invention, at least three sampling holes are drilled on the upper plane and / or the lower plane by a drill bit and iron filings are taken out, and the center lines of the sampling holes are staggered with each other.

[0010] As a further improvement of the present invention, the sampling holes include a first sampling hole and at least two second sampling holes, the first sampling hole is located in the middle of one of the upper plane or the lower plane, the second sampling hole is located on the other of the upper plane or the lower plane, and each second sampling hole is located outside the first sampling hole.

[0011] As a further improvement of the present invention, the distance between the upper plane and the lower plane is H, and the depth of the sampling hole is greater than H / 2.

[0012] As a further improvement of the present invention, when the upper plane and the lower plane are machined on the surface of the pig iron block, the machining depth is 1-5 mm.

[0013] As a further improvement of the present invention, the upper plane and the lower plane are processed on the surface of the pig iron block by milling. After the milling is completed, the iron filings milled from the pig iron block are discarded, and the pig iron block is washed clean with a steel brush and then blown clean with compressed air.

[0014] Beneficial Effects

[0015] Compared with the prior art, the advantages of the pig iron block analysis sample drilling method of the present invention are:

[0016] 1. Improve the surface structure of the pig iron block by milling the surface of the pig iron block. First, improve the stability of the pig iron block drilling sample, avoid the drill bit slipping, and improve the sample preparation efficiency; second, remove pores, reduce the probability of drill bit damage, and reduce the sample preparation cost.

[0017] 2. Use a milling machine to mill off 1-5mm of the top and bottom surfaces of the pig iron block to make the top and bottom of the pig iron block flat, increase the force-bearing surface, prevent the drill bit from slipping, and ensure that the pig iron block is stable when drilling.

[0018] 3. Discard the iron filings cut from milling, clean the pig iron block with a steel brush, and then blow the pig iron block clean with compressed air to prevent mud, sand and other debris from sticking to the surfaces at both ends of the pig iron block and inside the pores, and prevent them from falling into the sample and affecting the sample composition, thereby improving the accuracy of the test results.

[0019] 4. The number of sampling holes is set to multiple, and the depth of the sampling holes is greater than H / 2 to prevent surface impurities from entering the sample, affecting the test results and misleading production.

[0020] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is the front view of the complete pig iron block;

[0023] Figure 2 This is one of the state diagrams of the pig iron block after milling;

[0024] Figure 3 This is the second state diagram of the pig iron block after milling. DETAILED DESCRIPTION

[0025] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0026] Example

[0027] The specific embodiments of the present invention are as follows Figures 1 to 3 As shown, a method for drilling analysis samples of pig iron blocks is provided, wherein an upper plane 21 and a lower plane 22 parallel to each other are processed on the upper surface and the lower surface of the pig iron block 1 respectively, a sampling hole 3 is drilled on the upper plane 21 and / or the lower plane 22 by a drill bit 3 and iron filings are taken out, and the iron filings are used as samples for component detection.

[0028] By standardizing the location and depth of drilling samples, we can avoid surface debris from entering the sample, affecting the test results and misleading production.

[0029] At least three sampling holes 3 are drilled on the upper plane 21 and / or the lower plane 22 by a drill bit 3 and iron filings are taken out, and the center lines of the sampling holes 3 are staggered with each other.

[0030] In this embodiment, the sampling holes 3 include a first sampling hole 31 and two second sampling holes 32. The first sampling hole 31 is located in the middle of one of the upper plane 21 or the lower plane 22, and the second sampling holes 32 are located on the other of the upper plane 21 or the lower plane 22. Each second sampling hole 32 is located outside the first sampling hole 31.

[0031] like Figure 2 As shown, the first sampling hole 31 is located in the middle of the upper plane 21 , and the two second sampling holes 32 are located on the lower plane 22 , and the two second sampling holes 32 are symmetrically arranged relative to the center line of the first sampling hole 31 .

[0032] In addition, the first sampling hole 31 can also be arranged in the middle of the lower plane 22, and the two second sampling holes 32 are located on the upper plane 21, and the two second sampling holes 32 are arranged symmetrically relative to the center line of the first sampling hole 31, such as Figure 3 shown.

[0033] The distance between the upper plane 21 and the lower plane 22 is H, and the depth of the sampling hole 3 is greater than H / 2.

[0034] When the upper plane 21 and the lower plane 22 are machined on the surface of the pig iron block 1, the machining depth is 1-5 mm. In this embodiment, in order to shorten the machining time and maintain the detection accuracy, the milling depth of the pig iron block 1 is 1-2 mm.

[0035] The upper plane 21 and the lower plane 22 are processed on the surface of the pig iron block 1 by milling. After the milling is completed, the iron filings milled from the pig iron block 1 are discarded, and the pig iron block 1 is cleaned with a steel brush and then blown clean with compressed air.

[0036] When using a drilling machine to drill the analysis sample of the pig iron block, first of all, the drill bit 4 must be sharpened to increase its sharpness and improve the sample preparation efficiency; secondly, the descent speed must be controlled and not too fast, otherwise the temperature of the drill bit 4 will be too high and the drilled iron filings will be easily oxidized; in addition, because the pig iron block 1 is sampled using an alloy-insulated drill bit, the wear of the drill bit must be checked after each point is drilled to avoid the broken drill bit part entering the sample and affecting the sample composition and test results.

[0037] The above-mentioned pig iron block analysis sampling method is used to solve the problems of poor accuracy and stability of existing pig iron block detection results, frequent re-inspections, large differences between re-inspection results and factory-entered results, resulting in large disputes between supply and demand parties and seriously affecting the stability of supply channels.

[0038] The present invention has been described above in conjunction with the best embodiments, but the present invention is not limited to the embodiments disclosed above, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A method for drilling analysis samples of pig iron blocks, characterized in that: An upper plane (21) and a lower plane (22) parallel to each other are processed on the upper surface and the lower surface of the pig iron block (1), respectively, a sampling hole (3) is drilled on the upper plane (21) and / or the lower plane (22) by a drill bit (3) and iron filings are taken out, and the iron filings are used as samples for component detection.

2. A method for drilling analysis samples of pig iron blocks according to claim 1, characterized in that: At least three sampling holes (3) are drilled on the upper plane (21) and / or the lower plane (22) by a drill bit (3) and iron filings are taken out, and the center lines of the sampling holes (3) are staggered with each other.

3. A method for drilling analysis samples of pig iron blocks according to claim 2, characterized in that: The sampling holes (3) comprise a first sampling hole (31) and at least two second sampling holes (32), the first sampling hole (31) being located in the middle of one of the upper plane (21) or the lower plane (22), the second sampling holes (32) being located on the other of the upper plane (21) or the lower plane (22), and each second sampling hole (32) being located outside the first sampling hole (31).

4. The method for drilling and sampling pig iron blocks according to claim 1, characterized in that: The distance between the upper plane (21) and the lower plane (22) is H, and the depth of the sampling hole (3) is greater than H / 2.

5. The method for drilling and sampling pig iron blocks according to claim 1, characterized in that: When the upper plane (21) and the lower plane (22) are machined on the surface of the pig iron block (1), the machining depth is 1-5 mm.

6. The method for drilling and sampling pig iron blocks according to claim 1, characterized in that: The upper plane (21) and the lower plane (22) are machined on the surface of the pig iron block (1) by milling. After the milling is completed, the iron filings milled from the pig iron block (1) are discarded, and the pig iron block (1) is cleaned with a steel brush, and then the pig iron block (1) is blown clean with compressed air.

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