CN105624538A

CN105624538A - Smelting technology of steel for cooker

Info

Publication number: CN105624538A
Application number: CN201511022533.0A
Authority: CN
Inventors: 郭宝贵
Original assignee: 郭宝贵
Current assignee: Dalian Weier Special Steel Co., Ltd.
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-06-01
Anticipated expiration: 2035-12-30
Also published as: CN105624538B

Abstract

The invention relates to a smelting technology of steel for a cooker. The technological process comprises the steps that 1, high-quality iron ore, rare earth ore and a reducing agent are ground into powder with the grain size smaller than or equal to 300 mesh, then the powder is mixed in proportion, water is added, and cold bonding of pellets is carried out at the temperature of 0 to 30 DEG C; 2, the pellets and anthracite blocks with the blockness of 30 mm to 80 mm are alternately added into refining equipment with a plurality of rows of air supply openings in a layered manner, hot air is blown into the refining equipment through a hot air opening, the temperature of the hot air is controlled to be 1,100 DEG C or above, and molten iron is obtained through the simultaneous smelting process of direct solid reduction and indirect gas reduction; 3, the molten iron is subjected to die casting to form ingots; and 4, electric furnace refining is carried out according to a traditional technology, and molten steel of the steel for the cooker is obtained. According to the smelting technology, experiments are carried out more than 500 times, and the technology is stable. The refined steel for the cooker is a steel type which contains no chromium or nickel or cadmium or lead or arsenic or other heavy metal elements, has corrosion resisting performance the same as that of stainless steel, and meanwhile has white metallic luster.

Description

A kind of pot tool smelting steel technique

Technical field

The present invention relates to a kind of smelting iron and steel technique, particularly not containing heavy metal elements such as " chromium, nickel, cadmium, lead, arsenic ", it is applicable to manufacturing the steel grade of pot tool.

Background technology

Along with socio-economic development, people also have more and more higher demand for standard of living quality, move human body poisonous and harmful problem for kitchen tools and tableware steel heavy metal element, pay attention to day by day. As the pot tool in kitchen tools and tableware, it is heated object under high temperature, the easier migration precipitation of its heavy metal. So, the heavy metal precipitation problem of pot tool steel is just stood in the breach.

Over several thousand, people use iron pot always; Owing to traditional iron pot is " black " pot, people bring into use " white " aluminum pot; It is found that the neural system of people was had very big harm by aluminum pot migration precipitation thing afterwards, the aluminum pot eighties in 20th century can better be substituted by Stainless Steel Kettle by erosion resistance again very soon.

In recent years, the heavy metal transformation that people pay close attention to again Stainless Steel Kettle tool precipitates out human body poisonous and harmful problem, seeks the new steel grade being more suitable for manufacturing pot tool.

Summary of the invention

Technical problem to be solved by this invention precipitates out human body poisonous and harmful problem for Stainless Steel Kettle tool heavy metal transformation, new smelting iron and steel technique is proposed, neither containing heavy metal elements such as " chromium, nickel, cadmium, lead, arsenic " in steel, there is again the corrosion resistance nature identical with stainless steel, there is the steel grade of white metal gloss simultaneously.

For achieving the above object, the present invention realizes by the following technical solutions:

A kind of pot tool smelting steel technique, this technological process comprises the steps:

1) high-quality iron ore and rare-earth mineral and reductive agent are ground granulation footpath respectively and it is less than or equal to 300 object powders, wherein TFe >=67% in iron ore, enrichment Sc >=77PPm in rare-earth mineral, fixed carbon C >=65% in reductive agent, then according to 100:4��6:30��50 ratio mixing, add water temperature be 0-30 DEG C environment under cooled agglomerated pellet;

2) again by hard coal block that pelletizing and lumpiness are 30-80, layering alternately adds in the refining equipment with many dispatch air port, refining equipment is blown into hot blast by hot-air mouth, hot blast temperature controls more than 1100 DEG C, directly reduces through solid and obtains molten iron with smelting process while of gas indirect reduction;

3) molten iron is molded into ingot;

4) carry out electric furnace refining traditionally, obtain a pot tool steel molten steel.

Described reductive agent can be coal Jiao, refinery coke or coal.

Compared with prior art, the invention has the beneficial effects as follows:

The refining process of the present invention carries out more than 500 tests, process stabilizing. Neither containing heavy metal elements such as " chromium, nickel, cadmium, lead, arsenic " in the pot tool steel of refining, there is again the corrosion resistance nature identical with stainless steel, there is the steel grade of white metal gloss simultaneously.

Accompanying drawing explanation

Fig. 1 is process flow sheet of the present invention.

Embodiment

Below in conjunction with embodiment, the present invention is further described:

Following examples describe the present invention. These embodiments are only that the optimum implementation to the present invention is described, and the scope of the present invention are not limited.

Embodiment 1

1) high-quality iron ore (TFe >=67%), rare-earth mineral (Sc >=77PPm), coal Jiao (fixed carbon C >=65%) are ground granulation footpath��300 object powder respectively, add water mixing, blending ratio is 100:5:40:10 by weight, is through nodulizer cooled agglomerated pellet in temperature under the environment of 20 DEG C;

2) by pelletizing and lumpiness being the hard coal block of 30-80, layering alternately adds the common refining equipment with many dispatch air port, and hot blast temperature controls to discharge molten iron after 150 minutes more than 1100 DEG C, and supply refining steel is used;

3) molten iron is poured into mould is cast ingot iron;

4) ingot iron is added in electric furnace, it is heated to 1500 DEG C, it is not necessary to modified, melting 1 hour, go out a pot tool steel molten steel.

Cr��0.0005%, Ni��0.0005%, Cd��0.0005%, Pb��0.0005%, As��0.0005% in above-mentioned pot tool steel.

Embodiment 2

1) high-quality iron ore (TFe >=67%), rare-earth mineral (Sc >=77PPm), refinery coke (fixed carbon C >=65%) are ground granulation footpath��300 object powder respectively, add water mixing, blending ratio is 100:5:50:12 by weight, is through nodulizer cooled agglomerated pellet in temperature under the environment of 25 DEG C;

2) by pelletizing and lumpiness being the hard coal block of 30-80, layering alternately adds the common refining equipment with many dispatch air port, and hot blast temperature controls to discharge molten iron after 150 minutes more than 1200 DEG C, and supply refining steel is used;

3) molten iron is poured into mould is cast ingot iron;

Embodiment 3

1) high-quality iron ore (TFe >=67%), rare-earth mineral (Sc >=77PPm), coal (fixed carbon C >=65%) are ground granulation footpath��300 object powder respectively, add water mixing, blending ratio is 100:4:40:15 by weight, is through nodulizer cooled agglomerated pellet in temperature under the environment of 30 DEG C;

2) by pelletizing and lumpiness being the hard coal block of 30-80, layering alternately adds the common refining equipment with many dispatch air port, and hot blast temperature controls to discharge molten iron after 140 minutes more than 1200 DEG C, and supply refining steel is used;

3) molten iron is poured into mould is cast ingot iron;

Embodiment 4

1) high-quality iron ore (TFe >=67%), rare-earth mineral (Sc >=77PPm), coal Jiao (fixed carbon C >=65%) are ground granulation footpath��300 object powder respectively, add water mixing, blending ratio is 100:4:35:13 by weight, is through nodulizer cooled agglomerated pellet in temperature under the environment of 20 DEG C;

2) by pelletizing and lumpiness being the hard coal block of 30-80, layering alternately adds the common refining equipment with many dispatch air port, and hot blast temperature controls to discharge molten iron after 140 minutes more than 1100 DEG C, and supply refining steel is used;

3) molten iron is poured into mould is cast ingot iron;

Claims

1. a pot tool smelting steel technique, it is characterised in that, this technological process comprises the steps:

3) molten iron is molded into ingot;

2. a pot tool smelting steel technique, it is characterised in that, this technological process comprises the steps:

1) high-quality iron ore and rare-earth mineral and reductive agent are ground granulation footpath respectively and it is less than or equal to 300 object powders, wherein TFe >=67% in iron ore, enrichment Sc >=77PPm in rare-earth mineral, fixed carbon C >=65% in reductive agent, then according to 100:5:40 ratio mixing, add water temperature be 0-30 DEG C environment under cooled agglomerated pellet;

3) molten iron is molded into ingot;

3. according to a kind of pot tool smelting steel technique described in claim 1 or 2, it is characterised in that, described reductive agent can be coal Jiao, refinery coke or coal.