Industrial furnace and production process for composition adjustment of smelting slags

A composition adjustment and industrial furnace technology, which is applied to the industrial furnace and production process for smelting slag composition adjustment, high-temperature molten smelting slag composition adjustment device field, can solve problems such as unevenness, rapid electrode consumption, grid pollution, etc., to achieve current Smooth voltage regulation, good production stability, and high labor productivity

Pending Publication Date: 2018-07-13
上海歌灵新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, most of the industrial furnaces used to adjust the composition of the above-mentioned smelting slag are electric arc furnaces, which are similar to submerged arc furnaces. The melt is heated by high-temperature arcs, and the thermal efficiency is low. Large pollution; the furnace is bulky, and water-cooled furnace shell is usually used, resulting in serious heat loss; the adaptability to slag is small, and the mixing ability for high-temperature materials is

Method used

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  • Industrial furnace and production process for composition adjustment of smelting slags
  • Industrial furnace and production process for composition adjustment of smelting slags

Examples

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Embodiment 1

[0053] Silico-manganese smelting slag is industrial waste generated in the production of silicon-manganese alloy enterprises, and 1.2-1.3 tons of silicon-manganese slag will be produced for every 1 ton of silicon-manganese alloy produced. In the silicon-manganese alloy smelting process, manganese ore, manganese-rich ore, silica and coke are mainly used as raw materials for smelting. The high-temperature slag produced in the smelting process usually becomes solid after water quenching or natural cooling in the air. The industrial furnace can directly produce a glass-ceramic plate for architectural decoration after properly adjusting the composition of the slag in a molten state. The chemical composition of silicomanganese slag is mainly composed of silicon dioxide and calcium oxide, aluminum oxide and magnesium oxide, among which CaO and SiO 2 The total content of the two > 60%, CaO / SiO 2 3 , 3~5%Na 2 CO 3, 8-10% quartz sand, 5-8% potassium feldspar, etc. can be used to prod...

Embodiment 2

[0056] Lead slag is the waste residue produced in the process of pyrometallurgy, and its main component is generally 20-30% SiO 2 , 30-40% FeO, 15-20% CaO, 5-25% ZnO. According to the chemical composition of lead slag, use 72% lead smelting slag as the main raw material, add 2-3% Glauber's salt, 15-20% quartz sand, 5-8% borax, etc. to adjust the composition, and then produce foamed microcrystalline plates with water quenching pellets. The slag composition adjustment process of this embodiment is the same as that of Example 1, the difference lies in the melting temperature and time, wherein the melting temperature of the mixing furnace is 1580 ° C, and the melting time is 8 to 10 hours; the melting temperature of the melting furnace is 1520°C, melting and homogenization time is 15-18 hours.

Embodiment 3

[0058] Ferrochrome slag is mainly chromium-containing waste slag produced during the smelting of high-carbon ferrochrome by the submerged arc furnace method, and its main component is 3-5% Cr 2 o 3 , 28-34% SiO 2 , 20-25% Al 2 o 3 , 25~30% MgO, 1~3% Fe 2 o 3 , 1-5% CaO. According to the chemical composition of ferrochrome slag, 75% ferrochrome slag is used as the main raw material, 2-3% soda ash, 10-15% quartz sand, etc. are added to adjust the composition to produce mineral insulation wool. The slag composition adjustment process of this embodiment is the same as that of Example 1, the difference lies in the melting temperature and time, wherein the melting temperature of the mixing furnace is 1490 ° C, and the melting time is 6 to 8 hours; the melting temperature of the melting furnace is 1450°C, melting and homogenization time is 8-10 hours.

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Abstract

The invention discloses an industrial furnace and a production process for composition adjustment of smelting slags. The industrial furnace comprises a mixing furnace, a connecting material tank, a smelting furnace and a discharging groove, wherein the mixing furnace is used for mixing and pre-smelting; the connecting material tank is inclined from a high position to a low position; the smelting furnace is used for smelting; the higher end of the connecting material tank is connected with a mixing furnace discharging opening of the mixing furnace; the lower end of the connecting material tankis connected with a feeding opening of the smelting furnace; the discharging groove is connected with a smelting furnace discharging opening of the smelting furnace; the furnace body structure, the feeding mode, the flow control, recycle of secondary solid wastes and the like of the industrial furnace are specifically designed in combination with technological conditions for slag tapping of the smelting slags, so effective compositions of the smelting slags can be fully utilized, meanwhile sensible heat contained by the smelting slags can be recycled farthest, and resource utilization of multi-variety high-additional-value products can be realized by utilizing various types of smelting slags.

Description

technical field [0001] The invention belongs to the technical field of industrial energy saving and environmental protection, and relates to a device for adjusting the composition of smelting slag in a high-temperature molten state, in particular to an industrial furnace and a production process for adjusting the composition of smelting slag. Background technique [0002] With the rapid development of my country's economy, the metallurgical industry (ferrous metals and non-ferrous metals) has developed rapidly, and the output of various industrial solid wastes has increased accordingly, which not only occupies a large amount of land, seriously pollutes the environment, but also causes waste of resources. Among them, a large amount of high-temperature molten slag is discharged during the smelting process of ferrous and non-ferrous metals, which is huge in quantity and various in variety. The temperature of these molten slags are all in the range of 1400-1500°C, containing a l...

Claims

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Application Information

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IPC IPC(8): F27D11/10F27D1/00C03B5/027C03B5/16C03C6/10C03C10/00C03C13/06
CPCF27D1/00F27D11/10C03B5/027C03B5/16C03C1/002C03C10/0063C03C13/06Y02P40/50
Inventor 朱春江孙灵李菊芳
Owner 上海歌灵新材料科技有限公司
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