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A kind of mould casting steel ingot covering agent and the adding method of this covering agent

A covering agent and steel ingot technology, applied in the field of steelmaking, can solve the problems of high environmental pollution pressure, environmental pollution, and increased processing costs, and achieve the effects of avoiding smoke pollution, protecting the environment, and reducing production costs

Active Publication Date: 2021-11-19
SINOSTEEL XINGTAI MACHINERY & MILL ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In view of the current pressure of environmental pollution, the use of covering agents for normal die-casting steel ingots is seriously polluted by smoke and dust
After the conventional steel ingot covering agent is added, a large amount of smoke and toxic gases will be generated due to combustion and heat, which not only pollutes the environment, but also poses a serious threat to the health of the staff
Especially for high-efficiency heating agents, it not only pollutes the environment, but also increases production costs. The unit price of ordinary covering agents is 4,400 yuan / t, and high-efficiency heating agents are 8,900 yuan / t
At present, the refining slag has no use value, and the waste treatment process is complicated, which increases the treatment cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The present embodiment is a two-pack cast-cast steel ingot product, using a 60t series ingot mold.

[0047] This embodiment refines the slag replacement cover, and uses double pack pouring, the specific steps are as follows:

[0048] 1 According to the refining intermediate package refining process, the total amount of net steel is calculated, the calculation formula is as follows:

[0049] Paste water supply = in front of the pouring middle package - middle bag empty package weight - refined accessories added to the amount of electric furnace

[0050] = 71-42-1.1-0.5 = 27.4t.

[0051] 2 According to the intermediate package, the water consumption is calculated on the package, the amount of water is poured, and the intermediate package can be smoothly slag, the calculation formula is as follows:

[0052] Packing pouring = ingot - middle package net steel

[0053] = 56.2-27.4 = 28.8t.

[0054] 3 When cast, the upper package is poured according to the calculation result, and ...

Embodiment 2

[0057] The present embodiment is a single package casting steel ingot product, using a 27-34T series of ingot molds.

[0058] This example refined slag replacement cover, using single package castings, the specific steps are as follows:

[0059] 1 To ensure that the refined steel bag is smooth, the electric furnace is accurately controlled;

[0060] Electric furnace out of mesh = ingot + external delivery + gate water content + electric furnace sloppy amount - refined furnace alloy adds amount X grade X yield

[0061] = 29 + 1 + 0.5 + 0.5- (328x0.65x0.95 + 258x0.75x0.9 + 153x0.6x0.95 + 1893x0.5x0.95) / 1000=29.6t.

[0062] 2 electric furnace out of steel, enter the refining furnace refining, and the ingredients are passed after pouring pouring;

[0063] 3 After all refining steel bag steel water is poured into the ingot mold, all the refined slabs are poured into the ingot and complete the castings.Refined slag has no smoke pollution after pouring.

[0064] According to the detection...

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PUM

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Abstract

The invention relates to a covering agent for die-casting steel ingots and a method for adding the covering agent, belonging to the technical field of steelmaking. The covering agent is refining slag, the main component of which is CaO‑Al 2 o 3 ‑SiO2 2 Department of oxides. Using refining slag instead of covering agent, its addition method is different, and the improved addition method is implemented according to single ladle pouring and double ladle pouring. In order to ensure the smooth slag discharge of the refining ladle during single-ladle pouring, it is necessary to precisely control the steel tapping amount of the electric furnace. When pouring double ladles, it is necessary to calculate the net molten steel volume and the pouring volume of the upper ladle. During pouring, the upper ladle pours molten steel according to the calculation results. When the poured molten steel reaches the required weight, stop pouring, and the tundish pours all the molten steel into the ingot mold according to the process requirements; After all the molten steel is poured into the ingot mold, all the refining slag is poured into the ingot mold to complete the pouring. In the present invention, the refining slag is used to replace the covering agent, which can not only reduce the production cost, but also avoid the generation of smoke and dust pollution, and realize the reuse of the refining slag.

Description

Technical field [0001] The present invention relates to a mold casting steel ingot cover and the cover of the cover, which belongs to the field of steelmaking technology. Background technique [0002] In view of the current environmental pollution pressure, normal mold casting steel ingot is severely contaminated with cover. Conventional steel ingot covers are added after the addition of a large amount of smoke and poisonous gases due to combustion fever, not only pollutes the environment, but also has a serious threat to the health of staff. Especially for high-efficiency fever, not only pollute the environment, while increasing production costs, ordinary cover unit prices are 4400 yuan / t, and high efficiency fever 8900 yuan / t. At present, refinement has no value, and the waste treatment process is complex and increases processing costs. Inventive content [0003] It is an object of the present invention to provide a mold casting steel ingot cover and the cover of the cover...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/00B22D1/00C21C7/076
CPCB22D1/00B22D7/00C21C7/076Y02P10/20
Inventor 辛胜朋韩维国刘建宁宁江马仁禄
Owner SINOSTEEL XINGTAI MACHINERY & MILL ROLL