Production of micro-carbon solder iron

A micro-carbon ferrochrome and production process technology, applied in the field of micro-carbon ferrochrome production process, can solve the problems of high production cost, long cycle, large investment, etc., and achieve the goal of reducing energy consumption, reducing production links, and saving equipment investment Effect

Inactive Publication Date: 2006-08-16
林冬华
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Problems solved by technology

[0006] Because the above-mentioned production method is not perfect, the production cost is high, the cycle is long, the energy consumption is large, and the investment is large. Therefore, adopting a new production process to produce micro-carbon ferrochrome is a problem that ferroalloy manufacturers pay attention to.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: the production technique of this micro-carbon ferrochrome adopts small stove (100 kilograms of charging) to carry out experimental production, mainly comprises the following steps:

[0020] 1.1), raw material pulverization: block high-carbon ferrochrome (its chemical composition: 8.1% C content, 63.5% Cr content, 0.87% Si content, 0.03% P content, 0.025% S content) The crusher crushes it into a small particle size below 1 cm, and then grinds it into a high-carbon ferrochromium powder with a molybdenum content of less than 200 molybdenum through a mill;

[0021] 1.2) Raw material batching into the furnace: add the oxide ferric oxide to the high-carbon ferrochrome powder and stir thoroughly, the molar ratio of which is carbon: oxide = 1:1-1.5, and put it into an intermediate frequency furnace capable of vacuuming and smelting. In the furnace; add 40 kilograms of ferric oxide in the present embodiment, content 90%, the powder material of particle size less th...

Embodiment 2

[0025] Embodiment 2: the production technique of this nitrided micro-carbon ferrochromium mainly comprises the following steps:

[0026] 1.1), raw material crushing: crush the blocky high-carbon ferrochrome into small particles, and grind it into high-carbon ferrochrome powder;

[0027] 1.2) Raw material batching into the furnace: add the oxide ferric oxide to the high-carbon ferrochromium powder and stir thoroughly, the molar ratio of which is carbon: oxide = 1:1-1.5, and put it into the intermediate frequency furnace that can be vacuumed and smelted. furnace;

[0028] 1.3), production process: power transmission and heating, temperature control at about 1300 degrees Celsius, vacuuming, the vacuum degree in the furnace should be higher than 6×10 -1 Pa, when the compound reaction of the materials in the furnace is basically completed, control the temperature at 1200-1350 degrees Celsius, stop power transmission or low-power power transmission, and then immediately inject nitr...

Embodiment 3

[0030] Embodiment 3: difference with embodiment 1, oxide is to adopt ferrous oxide, and its molar ratio is carbon: ferrous oxide=1: 1-1.5.

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Abstract

The invention is about the process of the chrome iron with little carbon. It includes: (1) breaking up the material: grinding the chrome iron with high carbon into the powder; (2) put the mixture of powder and the oxidate which ratio is 1: 1-1.5 into the vacuum medium-frequency furnace; (3) the temperature of the furnace is 1200-1350 DEG C and the vacuum degree is higher than 6*10-1 Pa, when the react finish, the temperature is improved to above 1600 DEG C; (4) When the chrome iron melts to liquid, it is lead out from the furnace and cast, so we can get the chrome iron with 0.15% carbon or the chrome iron with 0.03% carbon. The process can save the cost and decrease the production taches.

Description

technical field [0001] The invention relates to a production process of ferroalloy, mainly a production process of micro-carbon ferrochrome. Background technique [0002] Ferroalloys are mainly composed of manganese series, chromium series and silicon series. Micro-carbon ferrochromium, ultra-fine carbon ferrochrome and ferrochromium nitride are an important branch of chromium series products, which are used as additive elements in the production of special steel. [0003] At present, there are two main industrial production methods: [0004] 1. Electric furnace method: smelting chromium ore and other raw materials into high-carbon ferrochrome in a submerged heat electric furnace. Its power consumption is about 3000 degrees. Put the high-carbon ferrochromium into the submerged electric furnace for the second time, add silica and other auxiliary materials, and smelt it into silicon-chromium alloy. Its power consumption is about 5000 degrees. Finally, send the silicon-chro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05B22D11/16C22C38/18
Inventor 林冬华
Owner 林冬华
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