Smelting process for high carbon ferro-chrome through sealed open arc electric furnace
A high-carbon ferrochromium and electric furnace technology, which is applied in the field of ferroalloy smelting process and ferroalloy production equipment, can solve the problems of increased smelting power consumption, reduced chromium recovery rate, long production process, etc. The effect of shortening the smelting process
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Embodiment 1
[0038] A process for smelting high-carbon ferrochrome in a closed open-arc electric furnace, comprising the following steps:
[0039] S1: With 400 parts of chrome ore powder, 40 parts of bentonite and 60 parts of magnesium-containing additives, the chromium ore powder, magnesium oxide, and bentonite are batched and mixed and transported to the inside of the rotary kiln by belts, and oxidized by magnesium Dry and / or preheat the raw materials by using the combustion heat of the material, and sinter the powdery chrome ore into block chrome ore that meets the needs of the electric furnace through the bonding effect of bentonite;
[0040] S2: Mix the ingredients from the batching center and add them into the closed open arc electric furnace through the furnace top hopper. The total weight of each batch of ingredients is less than 800kg, and each batch of ingredients is sent to the mixing silo for mixing. The batching error is controlled within ±0.5%. ;
[0041] S3: Add the premixe...
Embodiment 2
[0046]A process for smelting high-carbon ferrochrome in a closed open-arc electric furnace, comprising the following steps:
[0047] S1: With 500 parts of chrome ore powder, 45 parts of bentonite and 70 parts of magnesium-containing additives, the chrome ore powder, magnesium-containing salt, and bentonite are fed into the rotary kiln with a belt after batching and mixing. The combustion heat of salt dries and / or preheats the raw materials, and sinters the powdered chrome ore into massive chrome ore that meets the needs of the electric furnace through the bonding effect of bentonite;
[0048] S2: Mix the ingredients from the batching center and put them into the closed open-arc electric furnace through the furnace top hopper. The total weight of each batch of ingredients is equal to 800kg. After each batch of ingredients is sent to the mixing silo for mixing, the batching error is controlled within ±0.5%. ;
[0049] S3: Add the premixed material into the closed open arc elect...
Embodiment 3
[0054] A process for smelting high-carbon ferrochrome in a closed open-arc electric furnace, comprising the following steps:
[0055] S1: With 600 parts of chrome ore powder, 50 parts of bentonite and 80 parts of magnesium-containing additives, the chromium ore powder, magnesium-containing minerals, and bentonite are batched and mixed and then transported to the inside of the rotary kiln with a belt. The combustion heat of minerals dries and / or preheats raw materials, and sinters powdery chrome ore into massive chrome ore that meets the needs of electric furnaces through the bonding effect of bentonite;
[0056] S2: Mix the ingredients from the batching center and add them into the closed open-arc electric furnace through the furnace top hopper. The total weight of each batch of ingredients is ≤800kg, and each batch of ingredients is sent to the mixing silo for mixing. The batching error is controlled within ±0.5%. ;
[0057] S3: Add the premixed material into the closed open...
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