阅读说明：本技术 一种新型矿热炉生产高硅低铝硅钙合金工艺 (Process for producing high-silicon low-aluminum-silicon-calcium alloy by novel submerged arc furnace ) 是由 张中科 雍展国 郭建平 张芮平 于 2020-06-17 设计创作，主要内容包括：本发明公开了一种新型矿热炉生产高硅低铝硅钙合金工艺,该高硅低铝硅钙合金按重量组分的各组分构成,硅石：1500-1600kg、石灰石：900-950kg、兰炭：650-680kg、烟煤：600-650kg、硅渣：200-300kg,该工艺包括以下步骤：将上述硅石、石灰石、兰炭、烟煤、硅渣按一定的配比比例称重；将上述材料依次混合,并按照配比批次加入到矿热炉中；矿热炉大电流升温加热；本发明所述的一种新型矿热炉生产高硅低铝硅钙合金工艺,炉龄周期由10个月提高到18个月,节省筑炉原材料,减少筑炉次数,降低工人劳动强度,提高生产效率,同时该工艺制备的产品质量显著提高：Si:58％提高到60％,Ca:28％提高到29％,Al≤1.25％,C≤0.4％；且产量提高：日产量由：36吨提高到40-45吨,具有实用性。(The invention discloses a novel submerged arc furnace process for producing a high-silicon low-aluminum-silicon-calcium alloy, which comprises the following components in parts by weight: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300kg, the process comprises the following steps: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion; mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion; heating with high current in a submerged arc furnace; the process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace has the advantages that the furnace life cycle is prolonged from 10 months to 18 months, furnace building raw materials are saved, the furnace building times are reduced, the labor intensity of workers is reduced, the production efficiency is improved, and meanwhile, the quality of products prepared by the process is remarkably improved: 58 percent of Si is increased to 60 percent, 28 percent of Ca is increased to 29 percent, Al is less than or equal to 1.25 percent, and C is less than or equal to 0.4 percent; and the yield is improved: the daily yield is as follows: the 36 tons is improved to 40-45 tons, and the practicability is realized.)

1. A novel process for producing a high-silicon low-aluminum-silicon-calcium alloy by a submerged arc furnace is characterized in that the high-silicon low-aluminum-silicon-calcium alloy comprises the following components by weight: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300 kg.

2. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: the water content of the carbon-based material in the bituminous coal is 12-18%.

3. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: the process for producing the high-silicon low-aluminum-silicon-calcium alloy by the submerged arc furnace comprises the following steps:

s1: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion;

s2: mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion;

s3: heating by a submerged arc furnace with high current, adding the mixture while melting the mixture added into the submerged arc furnace, heating to 1350-1650 ℃, and refining for 12-20min after all the materials are melted to obtain liquid high-silicon low-aluminum-silicon-calcium alloy;

s4: and discharging the high-silicon low-aluminum-silicon-calcium alloy from the furnace, pouring the high-silicon low-aluminum-silicon-calcium alloy into a ship-shaped ladle car, pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold from the ladle car for casting, cooling and crushing the high-silicon low-aluminum-silicon-calcium alloy into blocks to obtain the finished high-silicon low-aluminum-silicon-calcium alloy.

4. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 3, which is characterized in that: the smelting time of the submerged arc furnace is 1.5-2h, and the smelting power consumption is 9000-9600 KW.h/t.

5. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: when pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold, cooling at normal temperature for 6-8 h.

6. The process for producing the high-silicon low-aluminum-silicon-calcium alloy by the novel submerged arc furnace according to claim 1, which is characterized in that: the working current of the submerged arc furnace is 460-520A.

Technical Field

The invention belongs to the field of high-silicon low-aluminum-silicon-calcium alloy processing, and particularly relates to a process for producing a high-silicon low-aluminum-silicon-calcium alloy by a novel submerged arc furnace.

Background

The submerged arc furnace is also called electric arc furnace or resistance furnace. It is mainly used for reducing and smelting raw materials such as ore, carbonaceous reducing agent and solvent. The method is mainly used for producing ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicomanganese and other ferroalloys, and is an important industrial raw material in the metallurgical industry and a chemical raw material such as calcium carbide and the like. The transformer of the submerged arc furnace has continuous and stable load, low impedance voltage, more voltage regulation stages, smaller stage difference and strong overload capacity. Can be divided into two types of loaded voltage regulation and non-excited voltage regulation. Generally, the first several stages of constant capacity output and the last several stages of constant current output;

the submerged arc furnace is also called electric arc furnace or resistance furnace. It is mainly used for reducing and smelting raw materials such as ore, carbonaceous reducing agent and solvent. The method is mainly used for producing ferrosilicon, ferromanganese, ferrochromium, ferrotungsten, silicomanganese and other ferroalloys, and is an important industrial raw material in the metallurgical industry and a chemical raw material such as calcium carbide and the like.

It features use of carbon or magnesium refractory as furnace lining and self-culturing electrode. The electrode is inserted into the furnace charge to carry out submerged arc operation, the energy and current of the electric arc are utilized to pass through the furnace charge, the energy is generated due to the resistance of the furnace charge to smelt metal, the charging is carried out sequentially, the iron slag is discharged intermittently, and the continuous operation is carried out. The transformer of the submerged arc furnace has continuous and stable load, low impedance voltage, more voltage regulation stages, smaller stage difference and strong overload capacity. Can be divided into two types of loaded voltage regulation and non-excited voltage regulation. Generally, the first several stages of constant capacity output and the last several stages of constant current output;

when the traditional submerged arc furnace is used for producing high-silicon low-aluminum-silicon-calcium alloy, the furnace life period is short, the furnace building times and the raw material consumption for furnace building are more, and the production efficiency is low.

Disclosure of Invention

The invention mainly aims to provide a novel process for producing a high-silicon low-aluminum-silicon-calcium alloy by a submerged arc furnace, which can effectively solve the problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a novel submerged arc furnace production process of high-silicon low-aluminum-silicon-calcium alloy comprises the following steps of: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300 kg.

Preferably, the moisture content of the carbon-based material in the bituminous coal is 12-18%.

A novel submerged arc furnace process for producing high-silicon low-aluminum-silicon-calcium alloy comprises the following steps:

s1: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion;

s2: mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion;

s3: heating by a submerged arc furnace with high current, adding the mixture while melting the mixture added into the submerged arc furnace, heating to 1350-1650 ℃, and refining for 12-20min after all the materials are melted to obtain liquid high-silicon low-aluminum-silicon-calcium alloy;

s4: and discharging the high-silicon low-aluminum-silicon-calcium alloy from the furnace, pouring the high-silicon low-aluminum-silicon-calcium alloy into a ship-shaped ladle car, pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold from the ladle car for casting, cooling and crushing the high-silicon low-aluminum-silicon-calcium alloy into blocks to obtain the finished high-silicon low-aluminum-silicon-calcium alloy.

Preferably, the smelting time of the submerged arc furnace is 1.5-2h, and the smelting power consumption is 9000-9600 KW.h/t.

Preferably, when the high-silicon low-aluminum-silicon-calcium alloy is poured into an ingot mold, the high-silicon low-aluminum-silicon-calcium alloy is cooled at normal temperature, and the cooling time is kept for 6-8 hours.

Preferably, the working current of the submerged arc furnace is 460-520A.

Compared with the prior art, the invention has the following beneficial effects: according to the novel process for producing the high-silicon low-aluminum-silicon-calcium alloy by the submerged arc furnace, the furnace life cycle is improved by 18 months from 10 months, the furnace building raw materials are saved, the furnace building times are reduced, the labor intensity of workers is reduced, the production efficiency is improved, and meanwhile, the product quality prepared by the process is remarkably improved: 58 percent of Si is increased to 60 percent, 28 percent of Ca is increased to 29 percent, Al is less than or equal to 1.25 percent, and C is less than or equal to 0.4 percent; and the yield is improved: the daily yield is as follows: the 36 tons is improved to 40-45 tons, and the practicability is realized.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

A novel submerged arc furnace production process of high-silicon low-aluminum-silicon-calcium alloy comprises the following steps of: 1500-1600kg, limestone: 900-950kg, semi coke: 650-680kg, bituminous coal: 600-650kg, silicon slag: 200-300 kg.

The moisture content of the carbon-based material in bituminous coal is 12-18%.

A novel submerged arc furnace process for producing high-silicon low-aluminum-silicon-calcium alloy comprises the following steps:

s1: weighing the silica, limestone, semi-coke, bituminous coal and silica slag according to a certain proportion;

s2: mixing the materials in sequence, and adding the materials into a submerged arc furnace in batches according to the proportion;

s3: heating by a submerged arc furnace with high current, adding the mixture while melting the mixture added into the submerged arc furnace, heating to 1350-1650 ℃, and refining for 12-20min after all the materials are melted to obtain liquid high-silicon low-aluminum-silicon-calcium alloy;

s4: and discharging the high-silicon low-aluminum-silicon-calcium alloy from the furnace, pouring the high-silicon low-aluminum-silicon-calcium alloy into a ship-shaped ladle car, pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold from the ladle car for casting, cooling and crushing the high-silicon low-aluminum-silicon-calcium alloy into blocks to obtain the finished high-silicon low-aluminum-silicon-calcium alloy.

The smelting time of the submerged arc furnace is 1.5-2h, and the smelting power consumption is 9000-9600 KW.h/t; when pouring the high-silicon low-aluminum-silicon-calcium alloy into an ingot mold, cooling at normal temperature, wherein the cooling time is kept for 6-8 h; the working current of the submerged arc furnace is 460-520A.