Novel composite riser heating agent and preparation method thereof

Abstract

The invention discloses a novel composite riser heating agent. The novel composite riser heating agent is prepared from the following raw material components in parts by weight: 25-35 parts of aluminum powder, 5-15 parts of magnesium powder, 3-7 parts of fluorite powder, 3-7 parts of silicon carbide powder, 5-10 parts of iron oxide powder, 3-7 parts of silicon calcium powder, 12-16 parts of aluminum slag, 8-12 parts of modified fly ash, 6-9 parts of sodium nitrate and 6-9 parts of sodium fluosilicate, wherein the modified fly ash is obtained by sequentially putting burnt fly ash into a 20-25 percent sulfuric acid solution and a 16-24 percent sodium hydroxide solution, stirring for 20-22h, washing the fly ash filtered from acid-base immersion liquid by using deionized water to be neutral, and filtering and drying the fly ash finally. The heating agent prepared from a raw material formula by using a method is good in heating effect and good in heat preservation effect, meets requirements for feeding of a casting, and guarantees the quality conformance of the casting.

Description

technical field

[0001] The invention relates to the technical field of metallurgical laying materials, in particular to a novel composite riser heating agent and a preparation method thereof. Background technique

[0002] The riser is a supplementary part added to the top or side of the casting to avoid casting defects. Its main functions are exhaust, slag removal, and molten steel feeding. The heat preservation effect is good, so a better heating and heat preservation riser is one of the effective methods to control the quality of steel castings.

[0003] The heating and heat preservation riser is composed of various materials such as heating agent, heat insulating agent and binder. During the pouring process, due to the chemical reaction of the riser material, the temperature of the molten metal in it is increased, thereby prolonging the temperature of the molten metal in the riser. During the solidification time, it flows back to the mold to realize feeding. However, wi...

Examples

Embodiment 1

[0026] To prepare modified pulverized coal, the burnt fly ash is first placed in 20% sulfuric acid, stirred for 20 hours, filtered out, then placed in 16% sodium hydroxide solution, stirred for 20 hours, and then removed from the acid-base The fly ash filtered out of the immersion liquid is washed with deionized water until neutral, and finally obtained after filtering and drying;

[0027] Select 25 parts by weight of aluminum powder, 5 parts of magnesium powder, 3 parts of fluorite powder, 3 parts of silicon carbide powder, 5 parts of iron oxide powder, 3 parts of silicon calcium powder, 12 parts of aluminum slag, 8 parts of modified fly ash , 6 parts of sodium nitrate, and 6 parts of sodium fluorosilicate are mixed, transported to the planetary mixer mill and stirred for 100 minutes, stirred into a mixture, then sent to the conveyor and sent to the spherical mold in the packaging machine for high-pressure molding, and the formed The sphere heating agent is pushed out of the ...

Embodiment 2

[0029] To prepare modified pulverized coal, the burnt fly ash is placed in 25% sulfuric acid, stirred for 22 hours, filtered out, then placed in 24% sodium hydroxide solution, stirred for 22 hours, and then removed from the acid-base The fly ash filtered out of the immersion liquid is washed with deionized water until neutral, and finally obtained after filtering and drying;

[0030] Select 35 parts by weight of aluminum powder, 15 parts of magnesium powder, 7 parts of fluorite powder, 7 parts of silicon carbide powder, 10 parts of iron oxide powder, 7 parts of silicon calcium powder, 16 parts of aluminum slag, 12 parts of modified fly ash , 9 parts of sodium nitrate, and 9 parts of sodium fluorosilicate are mixed, transported to the planetary mixer mill and stirred for 120 minutes, stirred into a mixture, then sent to the conveyor and sent to the spherical mold in the packaging machine for high-pressure molding, and the formed The sphere heating agent is pushed out of the mol...

Embodiment 3

[0032] To prepare modified pulverized coal, put the burnt fly ash in 23% sulfuric acid, stir for 21 hours, filter out, then place in 20% sodium hydroxide solution, stir for 21 hours, and then remove from acid-base The fly ash filtered out of the immersion liquid is washed with deionized water until neutral, and finally obtained after filtering and drying;

[0033] Select 30 parts of aluminum powder, 10 parts of magnesium powder, 5 parts of fluorite powder, 5 parts of silicon carbide powder, 7 parts of iron oxide powder, 5 parts of silicon calcium powder, 14 parts of aluminum slag, and 10 parts of modified fly ash according to parts by weight , 7 parts of sodium nitrate, and 7 parts of sodium fluorosilicate are mixed, transported to the planetary mixer mill and stirred for 110 minutes, stirred into a mixture, then sent to the conveyor and sent to the spherical mold in the packaging machine for high-pressure molding, and the formed The sphere heating agent is pushed out of the m...

technical field

[0001] The invention relates to the technical field of metallurgical laying materials, in particular to a novel composite riser heating agent and a preparation method thereof. Background technique

[0002] The riser is a supplementary part added to the top or side of the casting to avoid casting defects. Its main functions are exhaust, slag removal, and molten steel feeding. The heat preservation effect is good, so a better heating and heat preservation riser is one of the effective methods to control the quality of steel castings.

[0003] The heating and heat preservation riser is composed of various materials such as heating agent, heat insulating agent and binder. During the pouring process, due to the chemical reaction of the riser material, the temperature of the molten metal in it is increased, thereby prolonging the temperature of the molten metal in the riser. During the solidification time, it flows back to the mold to realize feeding. However, wi...

Examples

Embodiment 1

[0026] To prepare modified pulverized coal, the burnt fly ash is first placed in 20% sulfuric acid, stirred for 20 hours, filtered out, then placed in 16% sodium hydroxide solution, stirred for 20 hours, and then removed from the acid-base The fly ash filtered out of the immersion liquid is washed with deionized water until neutral, and finally obtained after filtering and drying;

[0027] Select 25 parts by weight of aluminum powder, 5 parts of magnesium powder, 3 parts of fluorite powder, 3 parts of silicon carbide powder, 5 parts of iron oxide powder, 3 parts of silicon calcium powder, 12 parts of aluminum slag, 8 parts of modified fly ash , 6 parts of sodium nitrate, and 6 parts of sodium fluorosilicate are mixed, transported to the planetary mixer mill and stirred for 100 minutes, stirred into a mixture, then sent to the conveyor and sent to the spherical mold in the packaging machine for high-pressure molding, and the formed The sphere heating agent is pushed out of the ...

Embodiment 2

[0029] To prepare modified pulverized coal, the burnt fly ash is placed in 25% sulfuric acid, stirred for 22 hours, filtered out, then placed in 24% sodium hydroxide solution, stirred for 22 hours, and then removed from the acid-base The fly ash filtered out of the immersion liquid is washed with deionized water until neutral, and finally obtained after filtering and drying;

[0030] Select 35 parts by weight of aluminum powder, 15 parts of magnesium powder, 7 parts of fluorite powder, 7 parts of silicon carbide powder, 10 parts of iron oxide powder, 7 parts of silicon calcium powder, 16 parts of aluminum slag, 12 parts of modified fly ash , 9 parts of sodium nitrate, and 9 parts of sodium fluorosilicate are mixed, transported to the planetary mixer mill and stirred for 120 minutes, stirred into a mixture, then sent to the conveyor and sent to the spherical mold in the packaging machine for high-pressure molding, and the formed The sphere heating agent is pushed out of the mol...

Embodiment 3

[0032] To prepare modified pulverized coal, put the burnt fly ash in 23% sulfuric acid, stir for 21 hours, filter out, then place in 20% sodium hydroxide solution, stir for 21 hours, and then remove from acid-base The fly ash filtered out of the immersion liquid is washed with deionized water until neutral, and finally obtained after filtering and drying;

[0033] Select 30 parts of aluminum powder, 10 parts of magnesium powder, 5 parts of fluorite powder, 5 parts of silicon carbide powder, 7 parts of iron oxide powder, 5 parts of silicon calcium powder, 14 parts of aluminum slag, and 10 parts of modified fly ash according to parts by weight , 7 parts of sodium nitrate, and 7 parts of sodium fluorosilicate are mixed, transported to the planetary mixer mill and stirred for 110 minutes, stirred into a mixture, then sent to the conveyor and sent to the spherical mold in the packaging machine for high-pressure molding, and the formed The sphere heating agent is pushed out of the m...