A kind of high-strength atmospheric corrosion-resistant steel bar and preparation method thereof

A technology of atmospheric corrosion resistance and steel bars, applied in furnaces, furnace types, hearth furnaces, etc., can solve the problems of cumbersome preparation process of high-strength atmospheric corrosion-resistant steel bars, waste of iron elements, high price, etc., and achieve strong practicability and market Competitiveness, production cost reduction, low cost effect

Active Publication Date: 2019-06-28
钢研晟华科技股份有限公司
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Problems solved by technology

[0010] In view of the above analysis, the present invention aims to provide a high-strength atmospheric corrosion-resistant steel bar and its preparation method, which solves the problem of using expensive concentrates in the alloy preparation process in the prior art and the waste of iron elements in the preparation process, and the high-strength atmospheric corrosion-resistant steel bar. The whole preparation process is cumbersome and costly

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  • A kind of high-strength atmospheric corrosion-resistant steel bar and preparation method thereof
  • A kind of high-strength atmospheric corrosion-resistant steel bar and preparation method thereof
  • A kind of high-strength atmospheric corrosion-resistant steel bar and preparation method thereof

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preparation example Construction

[0038] In a first aspect, the present invention provides a method for preparing high-strength atmospheric corrosion-resistant steel bars, such as figure 1 shown, including the following steps:

[0039]Step S1: Perform pretreatments such as drying, crushing, grinding and screening on the raw materials (sea placer, copper slag and coal powder), and mix the pretreated raw materials evenly to obtain a raw material mixture.

[0040] Specifically, in the above step S1, the pretreatment process may include the following steps: drying sea placer, copper slag and coal powder at 150°C to 200°C; drying the dried sea placer, copper slag and coal The powder is crushed to a particle size of 0.1 mm to 25 mm; the crushed sea placer, copper slag and coal powder are ground by a ball mill until the particle size is -120 mesh, accounting for more than 80%. After the above pretreatment, the moisture of the raw materials is basically removed, and the particle size becomes smaller at the same time,...

Embodiment 1

[0120] The main components of copper slag in this embodiment are shown in Table 1, and the components of sea placer, coal powder and slaked lime are shown in Table 2, Table 3 and Table 4, respectively.

[0121] The main component (wt%) of table 1 copper slag

[0122]

[0123] The main component (wt%) of table 2 sea placer

[0124]

[0125] The main component (wt%) of table 3 pulverized coal

[0126]

[0127] The main component (wt%) of table 4 slaked lime

[0128]

[0129] In this embodiment, the reduction-crushing-magnetic separation-briquetting process route is adopted, and the operation steps of producing vanadium-titanium-copper-iron alloy using the above-mentioned copper slag and sea sand ore are as follows:

[0130] Dry the copper slag, sea placer and coal powder at 150°C, crush them to a particle size of 0.1-25mm, and use a ball mill to grind the copper slag, sea placer and coal powder until the particles with a particle size of -120 mesh account for more ...

Embodiment 2

[0135] The components of copper slag, sea sand ore, coal powder and slaked lime in this embodiment refer to Table 1, Table 2, Table 3 and Table 4 in Embodiment 1, respectively.

[0136] In this embodiment, the reduction-crushing-magnetic separation-briquetting process route is adopted, and the operation steps of producing vanadium-titanium-copper-iron alloy using the above-mentioned copper slag and sea sand ore are as follows:

[0137] Dry the copper slag, sea placer and coal powder at 200°C, crush them to a particle size of 0.1-25 mm, and use a ball mill to grind the copper slag, sea placer and coal powder until the particle size is -120 mesh and account for more than 80%; weigh The ratio of copper slag, sea sand ore, coal powder, slaked lime and syrup is 145..4:100:51.70:38.73:26.86; Converted weighing to 0.7 (CaO / SiO 2=0.7), the additive syrup is weighed by 7% of the total weight of copper slag powder, sea sand ore powder, coal powder, and slaked lime, and water is weighed...

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Abstract

The invention discloses a high-strength atmospheric-corrosion-resistant steel bar and a preparation method thereof, and belongs to the technical field of steel preparation. According to the preparation method, the problems that in the prior art, high-priced ore concentrates are adopted in the alloy preparation process, iron is wasted in the preparation process and the whole preparation process ofthe high-strength atmospheric-corrosion-resistant steel bar is tedious and high in cost are solved. The preparation method comprises the following steps that 1, marine sand ore, copper slag and coal powder are pretreated and uniformly mixed, so that a raw material mixture is obtained; 2, hydrated lime flux and a syrup additive are added into the raw material mixture, so that a to-be-reduced material is obtained; 3, the to-be-reduced material is pressed into a ball and dried, so that a pellet is obtained; 4, reduction and posttreatment are carried out on the pellet, so that a vanadium-titanium-copper-iron alloy is obtained; and 5, molten steel smelting is carried out through a converter or an electric furnace, the vanadium-titanium-copper-iron alloy and ferrophosphorus are added in the tapping process of molten steel, refining, continuous casting and hot rolling are carried out, so that the high-strength atmospheric-corrosion-resistant steel bar is obtained. The preparation method can be used for preparing the high-strength atmospheric-corrosion-resistant steel bar.

Description

technical field [0001] The invention relates to a steel preparation method, in particular to a high-strength atmospheric corrosion-resistant steel bar and a preparation method thereof. Background technique [0002] High-strength atmospheric corrosion-resistant steel bar refers to hot-rolled construction steel with a yield strength of 400 MPa and above and atmospheric corrosion resistance. It has the characteristics of high strength, high atmospheric corrosion resistance, and excellent comprehensive performance. [0003] In the prior art, the production of high-strength atmospheric corrosion-resistant steel bars is mainly carried out by adding copper alloys, phosphorus-iron alloys, and vanadium-nitrogen alloys for microalloying during the molten steel smelting process. [0004] Due to the shortage of copper and vanadium resources, the production process of copper alloy and vanadium-nitrogen alloy is long and the production cost is high, which leads to the continuous increase ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22C38/12C22C38/14C22C38/16C22C38/04C22C38/02C22C35/00C22B1/24C21B13/10C21B13/14C21D8/08
CPCC21B13/105C21B13/14C21D8/08C22B1/2406C22C33/06C22C35/005C22C38/002C22C38/02C22C38/04C22C38/12C22C38/14C22C38/16
Inventor 周和敏武兵强齐渊洪
Owner 钢研晟华科技股份有限公司
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