New method for medium-carbon ferrochrome production

Abstract

The invention relates to a new method for medium-carbon ferrochrome production, and belongs to the technical field of ferrous metal smelting. The new method disclosed by the invention comprises the following steps: preparing 350-360kg of Cr2O3 and 85-95kg of silica according to per ton of liquid high-carbon ferrochrome, wherein the Cr2O3 is supplied by chrome ores; and stacking the prepared material chrome ores and silica at the bottom of a furnace, and smelting at 1500-1800 DEG C in a manner of bottom heating to obtain medium-carbon ferrochrome. The new method disclosed by the invention is simple in process, low in energy consumption, low in requirement on equipment, and convenient for large-scale industrialized application.

Description

technical field

[0001] The invention relates to a new method for producing medium-carbon ferrochrome, belonging to the technical field of black metal smelting technology. Background technique

[0002] According to different carbon content, ferrochrome is divided into high carbon ferrochrome (C≦10%), medium carbon ferrochrome (C≦4.0%), low carbon ferrochrome (C≦0.5%), micro-carbon ferrochrome (C≦0.15%) %)Wait. At present, there are mainly two production methods of medium carbon ferrochrome:

[0003] 1. Electric silicon thermal method; electric silicon thermal method is actually a desiliconization method. In the refining electric furnace, the oxides in the chromium ore are used to remove the silicon in the silicon-chromium alloy to achieve the purpose of producing medium-carbon ferrochromium. Medium-carbon chromium The C content in iron depends entirely on the C content of the chromium-silicon alloy. Its main reaction is as follows:

[0004] 2Cr 2 o 3 +3Si=3SiO 2 +4Cr ...

Examples

Embodiment 1

[0034] In the production of Cr60C2.0 chromium products, the composition wt% of various raw materials is shown in Table 1:

[0035] According to the proportion of 0.88 tons of high-carbon ferrochrome, 0.65 tons of Sudanese chrome ore, and 0.08 tons of silica, the raw materials are prepared, and the refining electric furnace is used as the smelting furnace to smelt at 1500-1800 ° C to obtain the product Cr60C2.0; the composition of the product Cr60C2.0 (wt%) see table 2

[0036] Table 1

[0037] raw material name

[0038] The chromium product composition in the produced Cr60C2.0 is: Table 2

[0039] product name

[0040] After batching 0.88 tons of high-carbon ferrochrome, 0.65 tons of Sudanese chrome ore, and 0.08 tons of silica, smelting according to the above-mentioned process to obtain 1 ton of Cr60C2.0. Unit smelting power consumption is 850KWH / ton of product.

technical field

[0001] The invention relates to a new method for producing medium-carbon ferrochrome, belonging to the technical field of black metal smelting technology. Background technique

[0002] According to different carbon content, ferrochrome is divided into high carbon ferrochrome (C≦10%), medium carbon ferrochrome (C≦4.0%), low carbon ferrochrome (C≦0.5%), micro-carbon ferrochrome (C≦0.15%) %)Wait. At present, there are mainly two production methods of medium carbon ferrochrome:

[0003] 1. Electric silicon thermal method; electric silicon thermal method is actually a desiliconization method. In the refining electric furnace, the oxides in the chromium ore are used to remove the silicon in the silicon-chromium alloy to achieve the purpose of producing medium-carbon ferrochromium. Medium-carbon chromium The C content in iron depends entirely on the C content of the chromium-silicon alloy. Its main reaction is as follows:

[0004] 2Cr 2 o 3 +3Si=3SiO 2 +4Cr ...

Examples

Embodiment 1

[0034] In the production of Cr60C2.0 chromium products, the composition wt% of various raw materials is shown in Table 1:

[0035] According to the proportion of 0.88 tons of high-carbon ferrochrome, 0.65 tons of Sudanese chrome ore, and 0.08 tons of silica, the raw materials are prepared, and the refining electric furnace is used as the smelting furnace to smelt at 1500-1800 ° C to obtain the product Cr60C2.0; the composition of the product Cr60C2.0 (wt%) see table 2

[0036] Table 1

[0037] raw material name

[0038] The chromium product composition in the produced Cr60C2.0 is: Table 2

[0039] product name

[0040] After batching 0.88 tons of high-carbon ferrochrome, 0.65 tons of Sudanese chrome ore, and 0.08 tons of silica, smelting according to the above-mentioned process to obtain 1 ton of Cr60C2.0. Unit smelting power consumption is 850KWH / ton of product.