阅读说明：本技术 一种高碳铬铁合金的低温冶炼工艺 (Low-temperature smelting process of high-carbon ferrochrome ) 是由 龚晓俅 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种高碳铬铁合金的低温冶炼工艺,属于金属冶炼领域。本发明仅需经过(1)：称量、(2)：破碎、(3)：造粒、(4)：冶炼、(5)：出炉、(6)：浇筑即可完成高碳铬铁合金的低温冶炼；本发明的一种高碳铬铁合金的低温冶炼工艺,可以有效地将冶炼温度降低200-450℃,节约了能源,降低了工艺难度,提高了冶炼的安全系数。(The invention discloses a low-temperature smelting process of a high-carbon ferrochrome alloy, belonging to the field of metal smelting. The invention only needs to pass through (1): weighing, (2): crushing, (3): granulation, (4): smelting, (5): tapping, (6): pouring to finish the low-temperature smelting of the high-carbon ferrochrome alloy; the low-temperature smelting process of the high-carbon ferrochrome can effectively reduce the smelting temperature by 200-450 ℃, save energy, reduce the process difficulty and improve the safety coefficient of smelting.)

1. The low-temperature smelting process of the high-carbon ferrochrome is characterized by comprising the following steps of:

(1) weighing: weighing 40-60 parts of chromium ore, 100-160 parts of iron ore, 45-55 parts of coke and 15-25 parts of silica according to the weight part ratio as raw materials;

(2) crushing: putting the weighed raw materials into a crusher for simple crushing, wherein the particle size of the crushed raw materials is 3-5 cm;

(3) and (3) granulation: putting the crushed raw materials into a granulator for granulation, wherein the particle size of the granulated raw materials is 2-3 mm;

(4) smelting: smelting the raw material particles in a smelting furnace at 1350-1500 ℃;

(5) discharging: pouring molten iron into an iron ladle for heat preservation;

(6) pouring: pouring the molten iron in the iron ladle into a mold to be poured, and finishing the low-temperature smelting of the high-carbon ferrochrome alloy after pouring.

2. The low-temperature smelting process of the high-carbon ferrochrome alloy according to claim 1, wherein the raw materials in the step (1) comprise the following components in parts by weight: 45 parts of chromium ore, 125 parts of iron ore, 45 parts of coke and 20 parts of silica.

3. The low-temperature smelting process of the high-carbon ferrochrome alloy according to claim 1, wherein the smelting temperature in the step (5) is 1375 ℃.

Technical Field

The invention relates to the field of metallurgy, in particular to a low-temperature smelting process of a high-carbon ferrochrome alloy.

Background

Ferrochrome is the most important raw material for producing stainless steel, and is mainly applied to producing stainless steel, ball bearing steel, tool steel, nitriding steel, hot strength steel, quenched and tempered steel, carburizing steel and hydrogen-resistant steel, because chromium plays a decisive role in stainless steel, and each stainless steel must contain a certain amount of chromium.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a low-temperature smelting process of high-carbon ferrochrome, which can be used for smelting high-carbon ferrochrome and can reduce the smelting temperature so as to reduce energy consumption.

In order to achieve the purpose, the invention adopts the technical scheme that: a low-temperature smelting process of a high-carbon ferrochrome alloy comprises the following steps:

(1) weighing: weighing 40-60 parts of chromium ore, 100-160 parts of iron ore, 45-55 parts of coke and 15-25 parts of silica according to the weight part ratio as raw materials;

(2) crushing: putting the weighed raw materials into a crusher for simple crushing, wherein the particle size of the crushed raw materials is 3-5 cm;

(3) and (3) granulation: putting the crushed raw materials into a granulator for granulation, wherein the particle size of the granulated raw materials is 2-3 mm;

(4) smelting: smelting the raw material particles in a smelting furnace at 1350-1500 ℃;

(5) discharging: pouring molten iron into an iron ladle for heat preservation;

(6) pouring: pouring the molten iron in the iron ladle into a mold to be poured, and finishing the low-temperature smelting of the high-carbon ferrochrome alloy after pouring.

Preferably, the raw materials in the step (1) are as follows according to the weight portion: 45 parts of chromium ore, 125 parts of iron ore, 45 parts of coke and 20 parts of silica.

Preferably, the smelting temperature of the step (5) is 1375 ℃.

The low-temperature smelting process of the high-carbon ferrochrome can effectively reduce the smelting temperature by 200-450 ℃, save energy, reduce the process difficulty and improve the safety coefficient of smelting.

Detailed Description

The present invention will be described in further detail with reference to examples.