CN101736130A - Al-Ca-Fe deoxidant and preparation method thereof - Google Patents

Abstract

The invention discloses an Al-Ca-Fe deoxidant and a preparation method thereof. The Al-Ca-Fe deoxidant comprises the components based on parts by weight percent: 8-65% of Al, 15-55% of CaO, 4-15% of CaF2, 20-50% of Fe and 3-10% of non-carbon-based binding agent. The preparation method of the Al-Ca-Fe deoxidant comprises the steps of: 1) respectively processing Al into small particles less than or equal to 15mm, CaO and CaF2 into small particles less than or equal to 4mm, and Fe into small particles less than or equal to 2mm; 2) mixing the components together according to the proportion, adding the mixture into a stirrer and evenly stirring, adding water to lead the material to be wetted, sending the mixed material into a pressure forming machine to be pressed into blank, and standing still and maintaining; and 3) putting the maintained blank into a heating furnace to be heated, stopping heating until 600-720 DEG C, performing heat preservation for 10-60min, cooling and discharging, and processing to be the needed particle size to obtain the Al-Ca-Fe deoxidant. The invention has the advantages that: compared with the traditional deoxidant, the Al-Ca-Fe deoxidant leads the deoxidation products to be better removed in the deoxidation process, omits the refining working procedure of steel liquid, and greatly reduces the production cost.

Description

A kind of aluminum calcium ferrum deoxidizer and production method

Technical field

The present invention relates to the reductor in a kind of smelting iron and steel.

Background technology

Aluminium is as conventional deoxidant element in smelting iron and steel is produced at present, and the principal mode of its existence is aluminium ingot, aluminum shot, ferro-silicon-aluminium, aluminium ferromanganese, ferro-aluminum, sial calcium (barium) etc., and scaling loss is big when fine aluminium such as aluminium ingot, aluminum shot deoxidation, the inclusion of generation such as Al ₂O ₃Difficult the removal, though reductors such as ferro-silicon-aluminium, aluminium ferromanganese, ferro-aluminum are better than fine aluminium, but still there is the difficult problem of removing in its deoxidation products, sial calcium (barium) though the reductor deoxidation products remove and to be easier to, the scaling loss but calcium barium easily gasifies, and silicone content height and aluminium content is lower should not adopt in many steel.In order to make the molten steel cleaningization, the deoxidation of main at present employing above-mentioned materials then molten steel is carried out refining, but handling like this of task is heavy, the cost height, and the cycle is long.

Summary of the invention

The purpose of this invention is to provide a kind of reductor and production method in smelting iron and steel.

The objective of the invention is to realize in the following way: a kind of aluminum calcium ferrum deoxidizer comprises following components in weight percentage:

Al?8-65％??CaO?15-55％??CaF ₂?4-15％??Fe?20-50％

Carbon-free type wedding agent 3-10%.

Described carbon-free type wedding agent is water glass or cement.

A kind of production method of aluminum calcium ferrum deoxidizer:

1), respectively aluminium is processed into≤particle of 15mm; CaO, CaF ₂Be processed into≤particle of 4mm; The particle of ironworking one-tenth≤2mm;

2), said components pressed proportion ingredient after, it is even to join in the stirrer batch mixing, and adds entry, makes batching wetting, sends into and is pressed into blank in the pressure forming machine, quiet putting in a suitable place to breed protected 3-7 days;

3), the blank that maintenance is good puts into process furnace and heat-treats, be heated to 600-720 ℃ after, stop heating, be incubated 10-60 minute, cooling is come out of the stove, and is machined to desired particle size.

The present invention has following beneficial effect, and the advantage that aluminum calcium ferrum deoxidizer is compared with traditional reductor is compound adding CaO-CaF in this reductor ₂Refining slag, this slag system are low melting point high-quality refining slag, are the first-selected refining slags that esr is put senior high-quality steel etc., owing to both had strong reductor Al and CaO-CaF in the aluminum calcium ferrum deoxidizer ₂So refining slag is the high-melting-point Al that produces during the oxygen element oxidation in by steel at Al ₂O ₃Can be in the time of inclusion by CaO-CaF ₂Refining slag absorbs and forms low-melting compound liquid phase and come-up removal in molten steel, and simple reductor is to be beyond one's reach, therefore, use aluminum calcium ferrum deoxidizer can be in deoxidation process not only deoxidation but also deoxidation products can be got rid of, in the production of many high-quality steel, can remove refining procedure from, thereby reduce production costs greatly.

Embodiment

The present invention will be further described below in conjunction with embodiment:

Embodiment 1

A kind of aluminum calcium ferrum deoxidizer and production method,

Get 30 kilograms of the regenerants of aluminium ingot or aluminum steel or aluminium, 25 kilograms of CaO, CaF ₂10 kilograms, 30 kilograms of iron, 5 kilograms of water glass.

1), respectively the regenerant of aluminium ingot or aluminum steel or aluminium is processed into≤particle of 15mm; CaO, CaF ₂Be processed into≤particle of 4mm; The particle of ironworking one-tenth≤2mm;

2), said components pressed proportion ingredient after, it is even to join in the stirrer batch mixing, and adds entry, makes batching wetting, sends into and is pressed into blank in the pressure forming machine, quiet putting in a suitable place to breed protected 3-7 days;

3), the blank that maintenance is good puts into process furnace and heat-treats, be heated to 600-720 ℃ after, stop heating, be incubated 10-60 minute, cooling is come out of the stove, and is machined to desired particle size.

Embodiment 2

A kind of aluminum calcium ferrum deoxidizer and production method

Get 30 kilograms of the regenerants of aluminium ingot or aluminum steel or aluminium, 30 kilograms of CaO, CaF ₂10 kilograms, 25 kilograms of iron, 5 kilograms of cement.

1), respectively the regenerant of aluminium ingot or aluminum steel or aluminium is processed into≤particle of 15mm; CaO, CaF ₂Be processed into≤particle of 4mm; The particle of ironworking one-tenth≤2mm;

2), said components pressed proportion ingredient after, it is even to join in the stirrer batch mixing, and adds entry, makes batching wetting, sends into and is pressed into blank in the pressure forming machine, quiet putting in a suitable place to breed protected 3-7 days;

3), the blank that maintenance is good puts into process furnace and heat-treats, be heated to 600-720 ℃ after, stop heating, be incubated 10-60 minute, cooling is come out of the stove, and is machined to desired particle size.

The physical and chemical index of aluminum calcium ferrum deoxidizer:

Unit: %

??Al	??Si	??P	??S	??CaO	??CaF 2	??Fe
							??8-65	??≤1.5	??≤0.08	??≤0.06	??15-55	??2-15	Surplus

Claims (3)

1. aluminum calcium ferrum deoxidizer is characterized in that: comprise following components in weight percentage:

Al?8-65％????CaO?15-55％????CaF ₂??4-15％????Fe?20-50％

Carbon-free type wedding agent 3-10%.

2. a kind of aluminum calcium ferrum deoxidizer according to claim 1 is characterized in that: described carbon-free type wedding agent is water glass or cement.

3. the production method of a kind of aluminum calcium ferrum deoxidizer according to claim 1 is characterized in that:

1), respectively aluminium is processed into≤particle of 15mm; CaO, CaF ₂Be processed into≤particle of 4mm; The particle of ironworking one-tenth≤2mm;

2), said components pressed proportion ingredient after, it is even to join in the stirrer batch mixing, and adds entry, makes batching wetting, sends into and is pressed into blank in the pressure forming machine, quiet putting in a suitable place to breed protected 3-7 days;

3), the blank that maintenance is good puts into process furnace and heat-treats, be heated to 600-720 ℃ after, stop heating, be incubated 10-60 minute, cooling is come out of the stove, and is machined to desired particle size.