阅读说明：本技术 一种铬铁的新型冶炼工艺 (Novel smelting process of ferrochromium ) 是由 龚晓俅 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种铬铁的新型冶炼工艺,属于金属冶炼领域。本发明仅需经过(1)：称量、(2)：研磨、(3)：压实、(4)：烧结、(5)：入炉、(6)：冶炼、(7)出炉和(8)入模即可完成铬铁的新型冶炼；本发明的一种铬铁的新型冶炼工艺,以价格低廉的铬矿粉为原料,经过简单的步骤即可冶炼成铬铁；本发明以水磨为研磨方式,最大限度降低了工艺流程中的扬尘,同时,陶瓷滤网可以回收炉渣,并将其作为下一轮冶炼的原料。整个工艺流程,降低了成本,利用了生产废物,有一点的经济和环保价值。(The invention discloses a novel smelting process of ferrochromium, and belongs to the field of metal smelting. The invention only needs to pass through (1): weighing, (2): grinding, (3): compaction, (4): sintering, (5): charging (6): smelting, (7) discharging and (8) entering a die to complete the novel smelting of ferrochrome; the novel smelting process of ferrochrome provided by the invention takes chromium ore powder with low price as a raw material, and ferrochrome can be smelted through simple steps; the invention takes the water mill as a grinding mode, reduces the dust emission in the process flow to the maximum extent, and simultaneously, the ceramic filter screen can recover the slag which is used as the raw material for the next round of smelting. The whole process flow reduces the cost, utilizes production waste and has little economic and environmental protection value.)

1. The novel smelting process of ferrochrome is characterized by comprising the following steps:

(1) weighing: weighing 45-55 parts of chromium ore powder, 23-35 parts of iron rust powder, 22-25 parts of coke powder, 2-5 parts of lime and 25-45 parts of recycled slag as raw materials according to the weight part ratio;

(2) grinding: mixing the raw materials, and further grinding in a water mill;

(3) compacting: compacting the ground raw materials, wherein the compacted material brick is 950-cm³The square bricks of (1);

(4) and (3) sintering: sintering the material brick;

(5) charging into a furnace: slowly heating the smelting furnace to 1350 ℃, preserving heat for 30 minutes, and putting the sintered material brick into the smelting furnace;

(6) smelting: continuously heating the furnace to 1700 ℃ to gradually melt the sintered material bricks into molten iron;

(7) discharging: pouring molten iron into an iron ladle and preserving heat;

(8) entering a mold: pouring the molten iron into a mould, and cooling the molten iron to finish the smelting of the ferrochrome.

2. The novel smelting process of ferrochrome according to claim 1, wherein a ceramic screen is arranged at the opening of the iron ladle.

Technical Field

The invention relates to the field of metallurgy, in particular to a novel smelting process of ferrochromium.

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

The invention aims to provide a novel smelting process of ferrochrome, and by using the process, chromium ore powder can be simply, conveniently and stably smelted into ferrochrome.

In order to achieve the purpose, the invention adopts the technical scheme that: a novel smelting process of ferrochrome comprises the following steps:

(1) weighing: weighing 45-55 parts of chromium ore powder, 23-35 parts of iron rust powder, 22-25 parts of coke powder, 2-5 parts of lime and 25-45 parts of recycled slag as raw materials according to the weight part ratio;

(2) grinding: mixing the raw materials, and further grinding in a water mill;

(3) compacting: compacting the ground raw materials, wherein the compacted material brick is 950-cm³The square bricks of (1);

(4) and (3) sintering: sintering the material brick;

(5) charging into a furnace: slowly heating the smelting furnace to 1350 ℃, preserving heat for 30 minutes, and putting the sintered material brick into the smelting furnace;

(6) smelting: continuously heating the furnace to 1700 ℃ to gradually melt the sintered material bricks into molten iron;

(7) discharging: pouring molten iron into an iron ladle and preserving heat;

(8) entering a mold: pouring the molten iron into a mould, and cooling the molten iron to finish the smelting of the ferrochrome.

Further, a layer of ceramic screen is arranged at the opening of the iron ladle.

The novel smelting process of ferrochrome provided by the invention takes chromium ore powder with low price as a raw material, and ferrochrome can be smelted through simple steps; the invention takes the water mill as a grinding mode, reduces the dust emission in the process flow to the maximum extent, and simultaneously, the ceramic filter screen can recover the slag which is used as the raw material for the next round of smelting. The whole process flow reduces the cost, utilizes production waste and has little economic and environmental protection value.

Detailed Description

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