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Method for directly preparing foundry pig iron from iron concentrate powder based on 3D printing

A 3D printing and iron concentrate powder technology, applied in the field of pig iron casting, can solve the problems of coke shortage, high price, dependence on coke, etc., reduce energy consumption and environmental pollution, facilitate engineering promotion and application, and the preparation method is simple and convenient Effect

Active Publication Date: 2020-12-25
ZHONGYE-CHANGTIAN INT ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are several main problems in the traditional steel long process process as follows: (1) The long process has many procedures, long process, high energy consumption, and there are many unreasonable problems such as heating→cooling→reheating, grinding→agglomeration→recrushing, etc. Repeated process
(2) Excessive reliance on coke
Therefore, the scarcity and high price of coke are the most serious challenges faced by the traditional process
(3) Serious environmental pollution

Method used

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  • Method for directly preparing foundry pig iron from iron concentrate powder based on 3D printing
  • Method for directly preparing foundry pig iron from iron concentrate powder based on 3D printing
  • Method for directly preparing foundry pig iron from iron concentrate powder based on 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 1) Take 100 parts of hematite ore powder, 8 parts of quicklime, 0.2 parts of nano-sized titanium dioxide, 0.1 part of micron-sized vanadium pentoxide, 0.1 part of micron-sized tungsten trioxide, and 0.08 parts of micron-sized cerium oxide in proportion to a certain Brazilian hematite ore powder. , 12 parts of silica were stirred and mixed evenly, and 0.9 parts of high elastic modulus polyethylene fibers were added in batches 3 times during the stirring process to obtain the final 3D printing mixture.

[0101] 2) Then use the 3D printing equipment to print the above-mentioned 3D printing mixture in batches according to the preset programming program to prepare cuboid agglomerates with a particle size of 16×12×10mm, and then place the agglomerates in an oven at 105°C for 3 hours to dry.

[0102] 3) Then put the dried agglomerate in a high-temperature melting furnace to preheat at 400° C. for 30 minutes, and then raise the temperature of the high-temperature melting furnace...

Embodiment 2

[0110] 1) Take 100 parts of magnetite ore powder, 10 parts of quicklime, 0.22 parts of nano-sized titanium dioxide, 0.12 parts of micron-sized vanadium pentoxide, 0.1 part of micron-sized molybdenum trioxide, and 0.12 parts of micron-sized ceria from a certain magnetite ore powder in Liaoning Province. , 15 parts of silica were stirred and mixed evenly, and 1.0 parts of high elastic modulus polyethylene fiber was added in batches 4 times during the stirring process to obtain the final 3D printing mixture.

[0111] 2) Then use the 3D printing equipment to print the above-mentioned 3D printing mixture in batches according to the preset programming program to prepare cube agglomerates with a particle size of 10×10×10 mm, and then place the agglomerates in an oven at 105°C for 3 hours to dry.

[0112] 3) Then put the dried agglomerate in a high-temperature melting furnace to preheat at 500° C. for 40 minutes, and then raise the temperature of the high-temperature melting furnace to 2...

Embodiment 3

[0119] 1) Take 100 parts of mixed ore powder (1:1 ratio) of a magnetite in Liaoning and a hematite concentrate in Australia, 10 parts of limestone, 0.22 parts of nano-sized titanium dioxide, and micron-sized vanadium pentoxide in proportion. 0.05 parts, 0.04 parts of micron tungsten trioxide, 0.04 parts of micron molybdenum trioxide, 0.08 parts of micron ceria, and 15 parts of porcelain stone were stirred and mixed evenly, and 1.2 parts of polyurethane elastic fibers were added in batches 4 times during the stirring process , to obtain the final 3D printing mixture.

[0120] 2) Then use the 3D printing equipment to print the above-mentioned 3D printing mixture in batches according to the preset programming procedure to obtain cuboid agglomerates with a particle size of 20×16×12mm, and then place the agglomerates in an oven at 105°C to dry for 3 hours .

[0121] 3) Then put the dried agglomerate in a high-temperature melting furnace at 600°C for 50 minutes, and then raise the ...

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Abstract

The invention discloses a method for directly preparing foundry pig iron from iron concentrate powder based on 3D printing. According to the method, a foundry pig iron preparation technology is combined with a 3D printing molding technology; meanwhile, the formula of iron-containing mixtures for ironmaking is optimized, and the feasibility, applicability and popularization of the 3D printing ironmaking technology are improved; thus, by utilizing the accuracy, synchronism and uniformity of the 3D printing molding technology, stable, high-quality and uniform-specification raw material agglomerates for preparing the foundry pig iron are obtained; and then the agglomerates are placed in a high-temperature furnace to obtain a qualified foundry pig iron product through drying, preheating, melting, condensation, etc.

Description

technical field [0001] The invention relates to 3D printing casting pig iron technology, in particular to a method for directly preparing casting pig iron based on 3D printing using iron concentrate powder, which belongs to the technical field of pig iron casting. Background technique [0002] At present, my country's iron and steel production mainly uses the long-process process, and the steel produced by this process accounts for about 80% of the total steel output. The long-flow process starts from iron ore, and is finally prepared into steel products through a series of processes such as sintering (coking) / pellet → blast furnace ironmaking → converter steelmaking. There are several main problems in the traditional steel long process process as follows: (1) The long process has many procedures, long process, high energy consumption, and there are many unreasonable problems such as heating→cooling→reheating, grinding→agglomeration→recrushing Repeat the process. (2) Exces...

Claims

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Application Information

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IPC IPC(8): C21B13/00C22B1/24B33Y70/10
CPCC21B13/008C21B13/0006C22B1/24B33Y70/10
Inventor 赵强魏进超廖继勇
Owner ZHONGYE-CHANGTIAN INT ENG CO LTD