Method for producing ferrosilicon alloy by means of metallurgical silicon slag

A technology of ferrosilicon alloy and metallurgical silicon, which is applied in the field of ferrosilicon alloy production, can solve the problems of waste of resources, high labor intensity, discarding of ferrosilicon, etc., and achieve the effect of solving pollution problems, realizing energy saving and consumption reduction, and realizing reuse

Inactive Publication Date: 2018-11-06
ORDOS XIJIN MINING & METALLURGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, metallurgical silicon slag is processed by manual crushing and screening, then the separated ferrosilicon is sold outside, and the remaining slag is filled or piled up. This processin

Method used

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  • Method for producing ferrosilicon alloy by means of metallurgical silicon slag
  • Method for producing ferrosilicon alloy by means of metallurgical silicon slag
  • Method for producing ferrosilicon alloy by means of metallurgical silicon slag

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Effect test

Embodiment 1

[0032] The embodiment of the present invention provides a method for producing ferrosilicon alloy by using metallurgical silicon slag. The smelting area in the submerged arc furnace is divided into a furnace core area and an annular edge area, and the ingredients are fed into the furnace as shown in Table 1 below.

[0033] Table 1 Consumption comparison table (kg) of the smelting raw materials adopted in the embodiment of the present invention 1

[0034]

[0035] Among them, the detection results of each element of metallurgical silicon slag are shown in Table 2 below.

[0036] Table 2 The detection result table of each element of the metallurgical silicon slag adopted in the embodiment 1 of the present invention

[0037]

[0038] The smelting process is as follows:

[0039] (1) Furnace smelting: according to the above-mentioned ratio, the core material and the ring edge material are respectively weighed, placed in the submerged arc furnace, and the smelting operation i...

Embodiment 2

[0046] The embodiment of the present invention provides a method for producing ferrosilicon alloy using metallurgical silicon slag. The smelting area in the submerged arc furnace is divided into a furnace core area and an annular edge area, and the ingredients are fed into the furnace as shown in Table 3 below.

[0047] Table 3 Consumption comparison table (kg) of the smelting raw materials adopted in the embodiment of the present invention 2

[0048]

[0049] Wherein, the detection results of each element of the metallurgical silicon slag are the same as those in Example 1.

[0050] In addition, its smelting process is similar to that of Example 1, and will not be repeated here.

[0051]Using the above conditions, the production indicators of ferrosilicon alloy can reach: power consumption is 7880 kWh / ton, comprehensive cost is 5500 yuan / ton, single furnace output is 42.5 tons / day, and the qualified rate of products is 98.5%.

Embodiment 3

[0053] The embodiment of the present invention provides a method for producing ferrosilicon alloy using metallurgical silicon slag. The smelting area in the submerged arc furnace is divided into a furnace core area and an annular edge area, and the ingredients are fed into the furnace as shown in Table 4 below.

[0054] Table 4 Consumption comparison table (kg) of the smelting raw materials adopted in the embodiment of the present invention 3

[0055]

[0056] Wherein, the detection results of each element of the metallurgical silicon slag are the same as those in Example 1.

[0057] In addition, its smelting process is similar to that of Example 1, and will not be repeated here.

[0058] Using the above conditions, the production indicators of ferrosilicon alloy can reach: power consumption is 7950 kWh / ton, comprehensive cost is 5680 yuan / ton, single furnace output is 41.0 tons / day, and the product qualification rate is 96.5%.

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Abstract

The invention discloses a method for producing ferrosilicon alloy by means of metallurgical silicon slag. A smelting area of a submerged arc furnace is divided into a furnace core area and an annularedge area surrounding the outer side of the furnace core area, the metallurgical silicon slag and a smelting furnace material are evenly mixed and then used as a furnace core material, and after smelting, drossing, pouring and finishing for slag removing, the ferrosilicon alloy is obtained; the content of Si in the metallurgical silicon slag is larger than 30.0 wt%, the contents of P, Al and Ca are smaller than 0.02 wt%, 7.0 wt% and 7.0 wt% respectively, and the adding amount of the metallurgical silicon slag accounts for smaller than 18 wt% of the total amount of the furnace core material andan annular edge material. According to the method, the metallurgical silicon slag can be adopted as a raw material directly, and thus resource recycling is achieved; by using the material characteristic that the monatomic silicon in the metallurgical silicon slag is the silicon component in the ferrosilicon alloy, the raw material usage amount and electricity consumption are reduced; moreover, the improvement of equipment investment is not needed, implementation is convenient, the method has significant social and environment-friendly effects and great economic benefits, and the practical application prospects are wide.

Description

technical field [0001] The invention relates to the technical field of ferrosilicon smelting, and more specifically relates to a method for producing ferrosilicon alloy by using metallurgical silicon slag. Background technique [0002] Ferrosilicon alloy is an alloy of iron and silicon refined from silica, carbonaceous reducing agent and iron material. It can be widely used in low alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. The smelting and production of ferrosilicon alloy is based on the arc heat generated by the electrode and the resistance heat generated by the charge (silica, carbonaceous reducing agent and iron charge) in a certain proportion. Carbon captures the oxygen in the silica (silicon dioxide), and generates gaseous carbon monoxide that escapes from the furnace mouth through the material layer, thereby reducing the silicon element, and meets the molten iron element to form a thermochemical reaction of f...

Claims

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Application Information

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IPC IPC(8): C22B4/06
CPCC22B4/06
Inventor 闫培荣李钢马建军肖思建李明
Owner ORDOS XIJIN MINING & METALLURGY CO LTD
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