CN1325663C

CN1325663C - Purifying agent

Info

Publication number: CN1325663C
Application number: CNB2004100331937A
Authority: CN
Inventors: 蒋祖滨
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-10
Filing date: 2004-04-06
Publication date: 2007-07-11
Anticipated expiration: 2024-04-06
Also published as: CN1810996A

Abstract

The present invention belongs to the metallurgic field, which mainly relates to purification and refining of molten steel (iron), particularly relates to purification and refining of molten nonferrous metal and ferroalloy smelting. Purifying agents are prepared by that optional two or more than two of garnet grains or garnet mineral powder, brucite mineral powder, calcium carbide, sodium bicarbonate and plant ash are mechanically crashed, stirred, uniformly mixed, pressed, shaped, divided into bags and packed according to different proportion formulas. The purifying agents are widely used for smelting, melting, remelting and casting of iron-base metal, smelting, remelting and casting of nonferrous metal, and smelting of various iron alloy products. The purifying agents have the functions of eliminating gases and oxygen, reducing sulfur and phosphorus, clearing or dispersing impurities in molten metal, purifying metal bases, refining crystal grains, optimizing metallographic structures, increasing the properties of metal, improving the quality of products and microalloying the present invention.

Description

Scavenging agent

Technical field:

The invention belongs to field of metallurgy, mainly relate to the purification and the refining of steel (iron) water; Relate to the purification and the refining of liquid non-ferrous metal; Relate to the purification and the refining of ferroalloy metallurgy.

Background technology:

All there is the single weak point of effect in products such as existing numerous metal scavenger, reductor, deslagging agent, and most products are to make through ferroalloy metallurgy, in process of production, not only expend a large amount of electric energy of country, form the wasting of resources, also cause serious environmental to pollute, be unfavorable for Sustainable development.

Summary of the invention:

The objective of the invention is to avoid background technology effect in use single and produce in to the negative impact of Sustainable development, design a kind of smelting that directly is used in liquid metal with the natural ore powder form, melting, in remelting and the casting, realize " potion is used more " and " potion multiple-effect ", give full play to the polynary effect and the synergistic effect of natural 17 kinds of rare earth elements that are rich in this scavenging agent unique formula and tens of kinds of metals or non-metallic element, when purification and refining liquid metal, play the deoxygenation of degassing, reduce sulphur phosphorus, inclusion in removing or the disperse liquid metal, purify metallic matrix, crystal grain thinning, optimize metallographic structure, increase metallicity, when multiple effect such as improving the quality of products, make the material or the product that all become " microalloying " through the material or the product of its refining treatment, make the mechanism of " thin-walled property " and " lightweight " make revolution, become possibility.

Realize that the object of the invention technical scheme is: with garnet seed or garnet breeze 40-80 part; brucite breeze 3-10 part; calcium carbide 15-50 part; sodium bicarbonate 15-50 part; any two or more sum in plant ash 2-15 part is 100 parts; form this purification series prescription, be widely used in the different field such as smelting, melting, remelting and casting of liquid metal.

The production technique of this scavenging agent is: according to the technical scheme prescription, and water content is not more than 3% various raw materials, is the scavenging agent product behind mechanical disintegration, stirring and evenly mixing, compression moulding, bag distribution packaging.

Consumption of this scavenging agent and adding method are: according to the quality of liquid metal with to the requirement of product, add-on is the arbitrary ratio between the 0.5-1%, uses " bag end addition method " to add.Use this scavenging agent to purify and the refining liquid metal, breed rapidly, reacting balance, free from environmental pollution, do not produce potential safety hazard.

Compare with background technology, the present invention has following advantage:

1, the mine tailing of first garnet being exploited is as the major ingredient in the scavenging agent prescription, not only solved in the garnet recovery process discarded tailing to the pollution of environment, also big because of the garnet tailings pile amount of storing up, can obtain big content of starting materials without mining, make this scavenging agent after popularization, have the ability of industrialized mass production.

2, this scavenging agent series product have the characteristics of " potion is used more ", can be widely used in smelting, melting, remelting and the casting of ferrous metals; Be used for smelting, remelting and the casting of non-ferrous metal; Be used for the melting of various iron alloy products.

3, this scavenging agent series product have the characteristics of " potion multiple-effect ", purifying, during the refining liquid metal, having the deoxygenation of degassing, reduce inclusion in sulphur phosphorus, removing or the disperse liquid metal, purify metallic matrix, crystal grain thinning, optimization metallographic structure, the effect that increases metallicity, improve the quality of products.

4, this scavenging agent is in refining steel (iron) water, 17 kinds of rare earth elements that contain in the scavenging agent prescription and tens of kinds of metals or non-metallic element, can play the effect of " microalloying ", make and realize that at low cost ferrous metals " alloying " or " microalloying " become possibility.

5, through this scavenging agent purify, the graphitic cast iron coupon of refining treatment, unit elongation is 0.28%, can use Atlantic Ocean board CHE422 mild steel electrode welding, have good machinability and welding strength after the coupon welding, broken consistent " the graphitic cast iron unit elongation is zero " of generally acknowledging of global cast iron and " graphitic cast iron can only weld with pure nickel or Ni-based electrode for cast iron " two conclusions with casting industry.This result may form novel material in the graphitic cast iron field, may produce great effect with cast material and welding and restoring process to lathe, even cause revolutionary technological change.

Specific embodiments:

Embodiment 1:

Ratio in 0.6%, the coupon with this scavenging agent refining treatment HT250 (grey cast iron) makes welds under the normal temperature state with Atlantic Ocean board CHE422 mild steel electrode, and weld seam has good machinability; Strike disconnectedly through brute force, section is positioned at matrix but not the commissure.Its metallographic and mechanical property change as table one and table two.

Metallurgical analysis (table one)

The sample title	Graphite		Perlite		Carbide (level)	Iron phosphide eutectic (level)
	Graphite		Perlite				Kenel	Stone long (level)	Matrix (level)	Scale of construction %
	Comparative Examples	A type+E type	3	2			Kenel	Stone long (level)	Matrix (level)	Scale of construction %	95	1	1
Embodiment 1	Comparative Examples	A type+E type	3	2	A type+a small amount of E type	3	3	98	1	1	95	1	1

Mechanical property detects (table two)

The sample title	Tensile strength (N/m m ²)	Hardness (HB)	Unit elongation %
The sample title	Tensile strength (N/m m ²)	Hardness (HB)	Unit elongation %	Comparative Examples	239	183-187	0
Embodiment 1	213	187	0.28	Comparative Examples	239	183-187	0

Embodiment 2:

In 0.5% ratio, this scavenging agent is added base iron with " ladle bottom pouring process " produce crankcase, qualification rate reaches 95%-98%, 75%-80% compares with the Comparative Examples qualification rate, qualification rate has improved more than 15% at least, both improve the prestige of manufacturer, created the new profit more than 500 yuan per ton for manufacturer again.

Embodiment 3:

Certain continuous pipe-casting factory uses continuous metal cast process to produce the thin wall iron pipe, can't solve thin-walled cast tube seepage problem when the high pressure pressure testing for a long time, ratio in 0.6%, use the thin wall iron pipe of producing after this scavenging agent refining base iron, seepage no longer when the high pressure pressure testing, patching material and labor wage have been saved, for enterprise has created profit.

Claims

1, a kind of scavenging agent, it is characterized in that forming by main raw material carchedonia ore and following less important raw material, the two amounts to 100 parts, main raw material carchedonia ore 40-80 part wherein, less important raw material is any two or more raw material that is selected from brucite 3-10 part, calcium carbide 15-50 part, sodium bicarbonate 15-50 part, 5 parts of four kinds of raw materials of plant ash 2-1.

2, the production technique of scavenging agent according to claim 1 is characterized in that handle by the good scavenging agent raw material of above-mentioned formulated, and behind mechanical disintegration, mixing, the scavenging agent product is made in quantitative package.

3, the purposes of scavenging agent according to claim 1, when being used for ferrous metals smelting, melting, external refining, remelting and casting, the ratio in 0.5%～1% uses ladle bottom pouring process to add.