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Pretreatment of material for smelting ferrosilicon

A pretreatment and raw material technology, applied in the direction of improvement of process efficiency, etc., can solve problems such as poor gas permeability of furnace materials, composition deviation, energy waste, etc., and achieve the effect of accelerating chemical reaction speed, uniform raw material composition, and expanding raw material sources

Inactive Publication Date: 2007-08-22
李垠平 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other silica and reducing agents that meet the requirements in terms of chemical composition and particle size but have poor high-temperature anti-knock performance cannot be used.
This technology has the following defects: 1. The particle size difference of the above three raw materials is large, therefore, there are few interfaces where chemical reactions occur, and the diffusion rate is slow, which is easy to cause composition deviation and deteriorate the furnace condition, thereby wasting raw materials and energy; 2. Due to the poor gas permeability of the furnace charge It not only leads to waste of energy, but also easily causes environmental pollution; 3. Due to the inability to use powdery and poorly anti-knock raw materials, it causes waste of resources and narrow scope of application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The powdered raw materials usually used to smelt ferrosilicon: silica (or quartz), reducing agent coke (or blue carbon) and iron filings are mixed evenly, and then pressed into pellets of uniform size by mechanical cold pressing.

[0013] The pellets can be directly sent to an electric furnace for smelting to prepare ferrosilicon.

Embodiment 2

[0015] Mix the powdered raw materials usually used to smelt ferrosilicon: silica (or quartz), reducing agent coke (or blue carbon) and iron filings, and binder silica powder, mix evenly, and then press by mechanical cold pressing Form into uniform-sized pellets.

[0016] The pellets can be directly sent to an electric furnace for smelting to prepare ferrosilicon.

Embodiment 3

[0018] Mix the powdered raw materials usually used to smelt ferrosilicon: silica (or quartz), reducing agent coke (or blue carbon) and iron filings, and an appropriate amount of organic binder, and then press it into a uniform size by mechanical cold pressing The pellets, you can. The organic binder is selected from starch, humic acid, lignin, molasses, asphalt, polyvinyl alcohol, polystyrene, polyvinyl acetate and sodium polyacrylate.

[0019] The pellets can be directly sent to an electric furnace for smelting to prepare ferrosilicon.

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Abstract

The pre-treatment of material for smelting ferrosilicon includes: mixing the materials silica or quartz, coke and iron filings; and the subsequent mechanical cold pressurizing to form pellet. The material for smelting ferrosilicon has homogeneous components, increased reaction interface, high chemical reaction speed, raised product yield, raised air permeability, low power consumption, environment friendship and lowered ferrosilicon producing cost.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, in particular to a pretreatment of raw materials in the ferrosilicon smelting technology. Background technique [0002] At present, the ferrosilicon smelting technology is based on silica (or quartz) with a particle size of 50-120mm and a SiO2 content of more than 97%, reducing agent coke (or blue carbon) with a particle size of 5-18mm, and iron filings whose length must be less than 100mm. Raw materials that do not meet the above particle size indicators are unqualified raw materials. Other silica and reducing agents that meet the requirements in chemical composition and particle size but have poor high-temperature anti-knock performance cannot be used. This technology has the following defects: 1. The particle size difference of the above three raw materials is large, therefore, there are few interfaces where chemical reactions occur, and the diffusion rate is slow, which is easy to cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/242C22B1/243C22B1/244
CPCY02P10/20
Inventor 李垠平张新国
Owner 李垠平
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