Compact production method of austenitic stainless steel

A technology of austenitic stainless steel and production method, applied in the direction of manufacturing converters, etc., can solve the problems of high energy consumption, complex production process and high cost, and achieve the effects of compact production process, avoiding process dispersion and reducing energy consumption

Inactive Publication Date: 2014-06-18
CHONGQING UNIV
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  • Abstract
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Problems solved by technology

[0011] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a compact production method of austenitic stainless steel, which is used to simplify the production line and process flow of austenitic stainless steel, reduce energy consumption, and reduce costs to solve the current There are problems of complicated austenitic stainless steel production process, high energy consumption and high cost in the existing technology

Method used

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  • Compact production method of austenitic stainless steel
  • Compact production method of austenitic stainless steel
  • Compact production method of austenitic stainless steel

Examples

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Embodiment

[0042] The chemical components of the raw materials used in the examples of the present invention are shown in Table 1, and the industrial analysis of the coke powder used is shown in Table 2.

[0043] Table 1 Chemical composition of raw materials (%)

[0044]

[0045] Table 2 Industrial analysis of coke powder

[0046]

Embodiment 1

[0048] Add 46 parts by weight of laterite nickel ore, 16 parts by weight of chromite concentrate, 6 parts by weight of manganese ore, 14 parts by weight of copper slag, 8 parts by weight of coke powder and 10 parts by weight of returned ore into the drum mixer, and then press 18% of the total weight of the mixture is added with water for mixing and granulation. The granulated mixture balls are evenly distributed on the base material on the trolley of the sintering machine using a distributor for sintering. The ignition temperature is 1050°C and the ignition time is 2 Minutes, the suction pressure is 8~10kPa. The obtained sintered ore is subjected to thermal crushing (≤40mm) treatment and then cooled to room temperature, and then sieved with a vibrating screen to measure the physical properties of the sintered ore. The yield, drop strength, drum strength, and anti-wear index of the sinter are 68.85%, 73.23%, 49.18%, and 20.10%, respectively. The finished sintered ore larger tha...

Embodiment 2

[0050] Add 45 parts by weight of laterite nickel ore, 15 parts by weight of chromite concentrate, 5 parts by weight of manganese ore, 10 parts by weight of copper slag, 10 parts by weight of coke powder and 15 parts by weight of returned ore into the drum mixer, and then press 18% of the total weight of the mixture is added with water for mixing and granulation. The granulated mixture balls are evenly distributed on the base material on the trolley of the sintering machine using a distributor for sintering. The ignition temperature is 1050°C and the ignition time is 2 Minutes, the suction pressure is 8~10kPa. The obtained sintered ore is subjected to thermal crushing (≤40mm) treatment and then cooled to room temperature, and then sieved with a vibrating screen to measure the physical properties of the sintered ore. The yield, drop strength, drum strength, and anti-wear index of the sinter are 72.32%, 75.86%, 51.49%, 19.21%, respectively. Put the finished sintered ore larger th...

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Abstract

The invention provides a compact production method of austenitic stainless steel. According to the method provided by the invention, the original four production lines for production of ferronickel, ferrochromium and manganese-iron alloys as well as mixed smelting steel-making are combined into one production flow, and nickel laterite, ferrochromium concentrate, manganese ore and copper slag are directly subjected to mixed sintering and smelting to produce the austenitic stainless steel, thus simplifying the process flow, reducing a sintering ignition temperature and the proportion of carbon, and reducing energy consumption and reducing production cost; and moreover, stainless steel mother solution containing chromium, nickel, manganese and copper is directly obtained by smelting, and the obtained thermal stainless steel mother solution is directly blown in a converter to produce stainless steel, thus further reducing heat loss, decreasing energy consumption, facilitating simplification of a production line of austenitic stainless steel, avoiding the problem of increase of equipment management and maintenance costs due to decentralized flow, and opening up a novel way for a production process of the austenitic stainless steel.

Description

technical field [0001] The invention relates to the fields of metallurgical engineering technology and environmental protection and energy saving technology, in particular to a compact production method of austenitic stainless steel. Background technique [0002] my country's steel production ranks first in the world, and the demand and production capacity of stainless steel have also increased significantly. Austenitic stainless steel came out in Germany in 1913 and has always played the most important role in stainless steel. Its production and usage account for about 70% of the total production and consumption of stainless steel, and chromium-nickel stainless steel accounts for one-third of the world's stainless steel production. two. Austenitic stainless steel refers to stainless steel with austenitic structure at room temperature. When the chromium content in the steel is more than 16%, the nickel content is more than 8%, and the carbon content is about 0.1%, it has a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C22B1/16
Inventor 吕学伟刘梅刘猛吕学明邱贵宝白晨光
Owner CHONGQING UNIV
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