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A process for refining manganese-silicon-aluminum alloys by silicothermal method in a shaking furnace

An aluminum alloy and silicothermal technology, applied in the field of manganese-silicon-aluminum alloy, can solve the problems of reducing the use efficiency of products, easy powdering of products, and high production costs, and achieve the advantages of improving mechanical properties, saving energy, reducing consumption and production costs. Effect

Inactive Publication Date: 2018-06-26
ZHENYUAN COUNTY HONGFENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the above-mentioned production process is relatively mature, there are the following problems. 1. The Mn content in the silicon-manganese aluminum alloy produced by this process is 40-50%, the Al content is 26-31%, and the Si content is 9-15%. The content of C is 2%, the content of P is 0.18%, and the content of S is 0.1%. The content of C, P, and S is too high, which affects the strength and brittleness of iron, and cannot be removed in the subsequent production process; 2. Mn in the alloy The content is low, the Al content is too high, it is easy to generate excess phase Al 4 o 3 , Al 4 o 3 Reacts on contact with moisture in the air: Al 4 o 3 +12H 2 O→4Al(OH) 3 +3CH 4 ↑, the reaction product Al(OH) 3 The volume of Al 4 o 3 1000 times of that, so the product is very easy to pulverize, and the powdery manganese-silicon-aluminum alloy product is easy to lose, and it is not easy to transport, thereby reducing the use efficiency of the product and affecting the promotion and use of the product; 3. This process uses the finished product as The raw materials are fused, and the production cost is high, while the manganese slag produced in the traditional low-carbon ferromanganese production process in the prior art cannot be efficiently utilized, and the added value of the product needs to be improved

Method used

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  • A process for refining manganese-silicon-aluminum alloys by silicothermal method in a shaking furnace
  • A process for refining manganese-silicon-aluminum alloys by silicothermal method in a shaking furnace

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Embodiment 1

[0056] Such as figure 1 As shown, the present invention provides a kind of process of refining manganese-silicon-aluminum alloy with shaking furnace silicothermal method, comprising the following steps:

[0057] (1) Add 31.2 parts of silico-manganese slag-washing iron, 20.8 parts of manganese ore and 7.2 parts of manganese-poor slag as charge into the refining furnace, and the manganese ore in the charge is gradually heated from 527°C to 1172°C under high temperature conditions It is decomposed and reduced, and the refining temperature is controlled to a maximum of 1500°C. After the sample is cooled in the refining furnace, if there are silicon flowers on the surface and the cross-section is obviously granular, the silicon will be judged to be out of the furnace, and the primary smelted product will be obtained. Initially smelted products by 0.2m 3 The flow rate of / min is poured into the ladle to separate the solid and liquid deposits. The heavier medium-carbon ferromanganes...

Embodiment 2

[0061] Such as figure 1 As shown, the present invention provides a kind of process of refining manganese-silicon-aluminum alloy with shaking furnace silicothermal method, comprising the following steps:

[0062] (1) Add 31.2 parts of silico-manganese slag-washing iron with 20.8 parts of manganese ore, 7.2 parts of manganese-poor slag, and 20.8 parts of lime as a charge and add it to the refining furnace. The manganese ore in the charge is gradually warming up from 527°C to It is decomposed and reduced at a high temperature of 1172°C, and the refining temperature is controlled to a maximum of 1500°C. After cooling the sample in the refining furnace, if there are silicon flowers on the surface and the cross-section is obviously granular, it will be judged that the silicon is out of the furnace. To obtain the primary smelted product, divide the primary smelted product by 0.2m 3 The flow rate of / min is poured into the ladle to separate the solid and liquid deposits. The heavier ...

Embodiment 3

[0066] Such as figure 1 As shown, the present invention provides a kind of process of refining manganese-silicon-aluminum alloy with shaking furnace silicothermal method, comprising the following steps:

[0067] (1) Add 39 parts of silicon-manganese slag-washing iron to 26 parts of manganese ore, 9 parts of manganese-poor slag, and 26 parts of lime as a furnace charge, and the manganese ore in the charge is gradually warming up from 527°C to It is decomposed and reduced at a high temperature of 1172°C, and the refining temperature is controlled to a maximum of 1500°C. After cooling the sample in the refining furnace, if there are silicon flowers on the surface and the cross-section is obviously granular, it will be judged that the silicon is out of the furnace. To obtain the primary smelted product, divide the primary smelted product by 0.2m 3 The flow rate of / min is poured into the ladle for solid-liquid separation. The heavier medium-carbon ferromanganese alloy liquid is s...

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Abstract

The invention relates to a technology for using a rocking furnace silicon-thermal method for refining a manganese silicon aluminum alloy. The technology comprises the steps that manganese ore, poor manganese slag and silicon manganese waste washing iron serve as charging materials to be smelted at a high temperature to obtain medium manganese furnace slag and medium carbon manganese iron alloy liquid; 2, silicon iron powder is taken and preheated, then the silicon iron powder and medium manganese furnace slag in the step 1 are placed into a rocking bag together to be subjected to silicon-thermal reaction to obtain a rocked and smelted mixture, and final slag of the upper layer of the rocked and smelted mixture is filtered off to obtain low-carbon and low-phosphorous silicon alloy liquid; and 3, molten aluminum obtained by melting waste aluminum and the manganese silicon alloy liquid obtained in the step 2 are mixed to obtain the manganese silicon aluminum alloy. According to the technology, the medium manganese furnace slag generated by the medium carbon manganese iron in production is utilized as a raw material to be smelted to obtain the manganese silicon aluminum alloy which cannot be pulverized easily, meanwhile, heat generated by the silicon-thermal reaction is utilized reasonably, an energy source is saved, consumption and the production cost are reduced, the medium carbon manganese iron and the manganese silicon aluminum alloy are produced in the same furnace, the productivity is improved by 40% on the basis of original productivity, and additional value of industrial waste is improved greatly.

Description

technical field [0001] The invention belongs to the field of alloy smelting, and specifically relates to a process for obtaining manganese-silicon-aluminum alloys which are not easy to pulverize by means of silithermal refining in a shaking furnace. Background technique [0002] In the 1960s, metallurgists in the former Soviet Union discovered that manganese-silicon-aluminum multi-alloy has the characteristics of deep deoxidation and improving the mechanical properties of steel in steelmaking, and developed two sets of production plans based on this feature: 1. Fusion method Production: dissolving aluminum in high-silicon-manganese-silicon or manganese-silicon alloy solution; 2. Smelting production: use carbon to reduce oxide charge containing manganese, silicon, and aluminum in a submerged arc furnace to produce manganese-silicon-aluminum alloy. In the 1990s, many domestic production enterprises further improved on the basis of fusion production, that is, after melting mang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C22/00C22C1/03
CPCC22C1/03C22C22/00
Inventor 李连普
Owner ZHENYUAN COUNTY HONGFENG NEW MATERIALS CO LTD