Special steel drainage agent and preparation method thereof

A technology of drainage agent and special steel, which is applied in foundry equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of many accidents of drainage agent, great influence of sand refractoriness, high product cost, and reduce toxic gas and dust emissions. , The thickness of the sintered layer is easy to control, and the effect of improving the pouring rate of the product

Active Publication Date: 2019-01-15
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be proved by the facts that the drainage agent currently available in the market can basically meet the market demand in the use of ordinary steel, but in the use of special steel smelting, there are relatively large defects, and the smooth production cannot be guaranteed
The specific manifestations are as follows: 1) Chromium drainage agent: Although the self-opening rate can meet the use requirements under the smelting conditions of ordinary steel types, there are more alloy components in the smelting of special steel, which has a greater impact on the refractoriness of sand. In addition, the self-opening rate is difficult to stabilize under the high temperature state of long-term treatment
And due to the characteristics of chrome ore, it is easy to cause contamination of molten steel and poor fluidity caused by high heat transfer coefficient, which leads to many drainage agent accidents.
2) Silicon drainage agent: the expansion coefficient is large, the fluidity is poor after the slide plate is opened, it is easy to cause ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An excellent special steel drainage agent, made of the following raw materials in parts by weight: 22 parts of natural zircon sand with a particle size of 0.1-0.5mm, 40 parts of chrome sand with a particle size of 0.1-0.5mm, and desert sand with a particle size of 0.3-0.6mm 35 parts, 3 parts of liquid graphite.

[0033] In the present invention, ZrO in natural zircon sand 2 The mass percentage ≥ 60%, SiO 2 The mass percentage of trace elements is ≤35%, and the mass percentage of trace elements is ≤5%. SiO in desert sand 2 The mass percentage ≥ 96%. Cr in chrome ore 2 o 3 The mass percentage ≥ 46%, SiO 2 The mass percentage of Cr / Fe is ≤1.5%, and the mass percentage of Cr / Fe is ≥1.6%. The mass percentage of C in graphite is ≥75%.

[0034] The preparation method of the excellent special steel drainage agent of the present embodiment is carried out according to the following steps:

[0035] Step 1: Transport the natural zircon sand, desert sand and chrome ore sand...

Embodiment 2

[0045] An excellent special steel drainage agent, made of the following raw materials in parts by weight: 25 parts of natural zircon sand with a particle size of 0.1-0.5mm, 38 parts of chrome sand with a particle size of 0.1-0.5mm, and desert sand with a particle size of 0.3-0.6mm 35 parts, 2 parts of liquid graphite.

[0046] In this embodiment, the chemical composition and content of natural zircon sand, desert sand, chrome ore sand, and graphite are the same as in Embodiment 1.

[0047] The preparation method of the excellent special steel drainage agent of the present embodiment is carried out according to the following steps:

[0048] Step 1: Transport the natural zircon sand, desert sand and chrome ore sand to the silo using the conveying device;

[0049] Step 2: Mix graphite, binder and water to make liquid graphite. The weight ratio of graphite, binder and water is 1:0.8:3.8, and add it to the material tank;

[0050] The third step: According to the weight ratio, tak...

Embodiment 3

[0058] An excellent special steel drainage agent, made of the following raw materials in parts by weight: 35 parts of natural zircon sand with a particle size of 0.1-0.5mm, 30 parts of chrome ore sand with a particle size of 0.1-0.5mm, and desert sand with a particle size of 0.3-0.6mm 33 parts, 1.6 parts of liquid graphite.

[0059] In this embodiment, the chemical composition and content of natural zircon sand, desert sand, chrome ore sand, and graphite are the same as in Embodiment 1.

[0060] The preparation method of the excellent special steel drainage agent of the present embodiment is carried out according to the following steps:

[0061] Step 1: Transport the natural zircon sand, desert sand and chrome ore sand to the silo using the conveying device;

[0062] Step 2: Mix graphite, binder and water to make liquid graphite. The weight ratio of graphite, binder and water is 1:1:4, and add it to the material tank;

[0063] The third step: According to the weight ratio, t...

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Abstract

The invention provides a special steel drainage agent and a preparation method thereof and belongs to the technical field of metallurgical fireproof materials. The special steel drainage agent is prepared by following raw materials of, by weight, 22-75 parts of natural zircon sand with granularity of 0.1-0.5mm, 8-40 parts of chrome ore with granularity of 0.1-0.5mm, 15-35 parts of desert sand withgranularity of 0.3-0.6mm and 1-3 parts of liquid graphite. According to the invention, the pouring rate of a product can be effectively improved; compared with the existing drainage agent, the automatic pouring rate can be improved by 10% or over and the basic automatic pouring rate can reach 100%; requirements are met that there are many types of special steel currently, the difference of components is big and long-time smelting is required; and the drainage agent and better drainage effects for steel types in war industry, nuclear power and special high-quality products are achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgical refractory materials, in particular to a drainage agent specially used for smelting special steel and a preparation method thereof. Background technique [0002] Ladle drainage agent, also known as drainage sand, is an unshaped refractory material with high refractoriness, stable performance at high temperature, and corrosion resistance to molten steel. It is a kind of bulk refractory material used to fill the ladle sitting brick and the upper nozzle. It is put into the ladle nozzle before the converter and electric furnace tap to prevent the molten steel from entering, and it will not be sintered as a whole under high temperature. It is released when steel is poured to guide the steel flow, which is the key link for the smooth progress of high-speed continuous steel casting. [0003] At present, with the transformation and upgrading of steel enterprises' products, the original general-to-e...

Claims

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Application Information

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IPC IPC(8): B22D41/44
CPCB22D41/44
Inventor 李秀峰
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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