High-strength refractory anti-seismic steel bar and low-cost preparation cost thereof

An anti-seismic steel bar and high-strength technology, applied in the field of high-strength refractory anti-seismic steel bar and its low-cost preparation, can solve the problems of cumbersome preparation process and high cost of high-strength refractory steel bar, achieve stable strength and performance, low cost, and save concentrate resources Effect

Active Publication Date: 2018-06-01
钢研晟华科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In view of the above analysis, the present invention aims to provide a high-strength refractory anti-seismic steel bar and its low-cost preparation method to solve the problems of cumbersome and high cost in the entire preparation process of high-strength fire-resistant steel bars in the prior art

Method used

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  • High-strength refractory anti-seismic steel bar and low-cost preparation cost thereof
  • High-strength refractory anti-seismic steel bar and low-cost preparation cost thereof
  • High-strength refractory anti-seismic steel bar and low-cost preparation cost thereof

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preparation example Construction

[0053] The preparation of the high-strength refractory steel bars described in the present invention belongs to the field of steel smelting and manufacturing. Iron and steel enterprises purchase very cheap sea sand ore and laterite nickel ore from the Southeast Asian market, and through direct reduction, obtain nickel-chromium-vanadium-titanium alloys. The cost of raw materials and The production process has low energy consumption, replacing the existing technology to purchase very expensive nickel-iron alloys, ferrochrome alloys, ferro-vanadium alloys or vanadium-nitrogen alloys, supplemented with ferro-niobium or ferro-molybdenum alloys and then added to molten steel for alloying, so the production cost of high-strength refractory steel bars by this method Inexpensive and highly competitive in the market.

[0054] Obviously, the preparation of traditional nickel-iron alloy, ferrochrome alloy, vanadium-iron alloy or vanadium-nitrogen alloy and the preparation of high-strength ...

Embodiment 1

[0136] The main components of the low-nickel and high-iron laterite nickel ore in this example are shown in Table 3, and the ingredients of sea placer, coal powder and slaked lime are shown in Table 4, Table 5 and Table 6, respectively.

[0137] Table 3 The main components (wt%) of low-nickel high-iron lateritic nickel ore 1#

[0138]

[0139] The main component (wt%) of table 4 sea placer

[0140] Element

TF

FeO

Fe 2 o 3

TiO 2

V 2 o 5

Al 2 o 3

CaO

MgO

SiO 2

other

content%

56.13

27

49.84

7.61

0.53

3.66

1.64

3.52

4.9

0.99

[0141] The main component (wt%) of table 5 pulverized coal

[0142]

[0143] The main component (wt%) of table 6 slaked lime

[0144]

[0145] In the present embodiment, the reduction-magnetic separation process route is adopted, and the operation steps of producing nickel-chromium-vanadium-titanium-iron alloy using the above-mentioned lateri...

Embodiment 2

[0151] See Table 8 for the main components of the high-nickel and low-iron laterite nickel ore used in this example, and see Table 4, Table 5 and Table 6 in Example 1 for the main components of sea placer, coal powder and slaked lime.

[0152] The main component (wt%) of table 8 high nickel low iron laterite nickel ore 2#

[0153]

[0154] In this embodiment, the reduction-magnetic separation process route is adopted:

[0155] The ratio of high nickel and low iron laterite nickel ore, sea sand ore, coal powder, slaked lime, and syrup is 363.54:100:60.22:88.39:36.73; the amount of coal powder is converted and weighed according to the C / O of 1.2, and the flux Slaked lime is weighed according to the basicity of 0.6 (CaO / SiO 2 =0.6), the additive syrup is weighed by 6% of the total weight, and the water is weighed by 5% to 6% of the total weight. The rest is the same as in Example 1, reduction-crushing-magnetic separation and briquetting to obtain nickel-chromium-vanadium-tit...

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Abstract

The invention relates to a low-cost preparation method of a high-strength refractory anti-seismic steel bar, and further discloses the high-strength refractory anti-seismic steel bar. The low-cost preparation method comprises the steps that 1, laterite nickel ore, marine placer and pulverized coal are dried, crushed, levigated and screened to obtain mixed particles; 2, a fusing agent of slaked lime and an additive of syrup are added into the mixed particles to obtain a to-be-reacted material; 3, the to-be-reacted material is subjected to ball pressing treatment to obtain a pellet; 4, the pellet is subjected to direct reduction-magnetic separation or smelting separation treatment to obtain an alloy; and 5, the alloy and ferromolybdenum or ferrocolumbium are added into molten steel, and LF refining, continuous casting and rolling are conducted to obtain the high-strength refractory anti-seismic steel bar. According to the low-cost preparation method of the high-strength refractory anti-seismic steel bar and the high-strength refractory anti-seismic steel bar, compared with separate use of the laterite nickel ore or the marine placer or copper slag, the reduction cost is greatly reduced, and an obtained nickel chromium vanadium titanium copper iron alloy can be directly used for low-cost production of the high-strength refractory steel bar; and the laterite nickel ore, the marineplacer and the copper slag are reasonably utilized, and energy saving and emission reducing are facilitated.

Description

technical field [0001] The invention relates to the technical field of steel preparation, in particular to a high-strength refractory and earthquake-resistant steel bar and a low-cost preparation method thereof. Background technique [0002] Hot-rolled steel bars mainly include ribbed steel bars and smooth round steel bars, which are important steel materials for reinforced concrete, and are widely used in the main reinforcement, stirrups, and reinforcement of reinforced concrete buildings. In recent years, with the rapid development of the national economy, my country's urban construction has advanced by leaps and bounds. According to GB50016-2014 "Code for Fire Protection Design of Buildings", for residential buildings with a building height greater than 27m and non-single-storey factory buildings, warehouses and other civil buildings with a building height greater than 24m, after the building height increases, the fire protection of the building becomes a direct relations...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C33/06C22B1/244C22B5/06
CPCC22B1/2406C22B1/244C22B5/06C22C33/06C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 周和敏武兵强王长城
Owner 钢研晟华科技股份有限公司
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