CN104072176A

CN104072176A - Novel environment-friendly blast furnace stemming

Info

Publication number: CN104072176A
Application number: CN201410338353.2A
Authority: CN
Inventors: 山国强
Original assignee: Individual
Current assignee: Anhui Safe Electronics Co Ltd
Priority date: 2014-07-16
Filing date: 2014-07-16
Publication date: 2014-10-01
Anticipated expiration: 2034-07-16
Also published as: CN104072176B

Abstract

The invention discloses novel environment-friendly blast furnace stemming which is characterized by comprising the following constituents by weight: 10 to 20 parts of disposable stemming, 5 to 15 parts of Yttrium mullite,10 to 20 parts of coal gangue rawore, 10 to 25 parts of modified magnesia-hercynite powder, 10 to 20 parts of modified clay, 10 to 33 parts of regenerative graphite electrode powder, 8 to 18 parts of a thickening agent, 3 to 8 parts of asphalt powder, 0.2 to 0.5 part of Glydol n 2002, 12 to 14.5 parts of an additive binding agent, and 0.1 part of nano-cellulose, wherein the thickening agent is a mixture of ferrovanadium ore and cupric oxide of which the weight ratio is 1 to 1. The stemming is low in cost, and high in air permeability, and can effectively maintain taphole reaming; during long-term storage, the service performance and operability of the stemming cannot decrease.

Description

A kind of novel environment friendly blast furnace mud

Technical field

The invention belongs to blast furnace ironmaking and use plastic refractory field, be specifically related to a kind of novel environment friendly blast furnace mud and preparation method.

Background technology

Blast furnace is the main equipment of smelting the pig iron, and after blast-furnace smelting iron, molten iron, from Tie Kou emits, is carried out continuously in order to guarantee to smelt, and iron notch must be blocked, and blocks the material of iron notch, is stemming.And iron notch is in life-time service process, all can there is erosion, iron notch there will be reaming, cause iron mouth to shoal, flowing molten iron is unstable, goes out unclean iron, even run the situations such as large stream, having a strong impact on production normally taps a blast furnace, and has finally affected the work-ing life of blast furnace and the growth of output.And iron mouth is in burner hearth inside, temperature is high, and generally, people cannot enter maintenance.

Stemming belongs to expendable consumed product, and generally only need to reach two or three hours work-ing life.Therefore meeting under the prerequisite of performance, the present invention has used with rear blown-out shot mud, the coal gangue rawore of stacking nowhere of discarding in coal mining process, reduced product cost, solved the problem that coal gangue solid waste is stacked nowhere, the resource of also having saved other, belongs to a kind of low-cost environment-friendly product simultaneously.

Summary of the invention

The object of the invention is to provide that a kind of cost is low, resource reusable edible, also has the blast furnace mud of iron mouth maintenance function, and this stemming can effectively utilize coal gangue raw material, and waste reduces costs, and can safeguard iron notch again simultaneously; In addition, stemming the inside has added Glydol n 2002, can guarantee that the stemming properties in process of depositing before use does not decline.

Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of blast furnace mud, is characterized in that described blast furnace mud is comprised of the component of following weight part: with rear blown-out shot mud: 10 ~ 20 parts; Yttrium mullite: 5 ~ 15 parts; Coal gangue rawore: 10 ~ 20 parts; Modification ferro-magnesium-aluminum spinelle powder: 10 ~ 25 parts; Modified clay: 10 ~ 20 parts; Regeneration graphite electrode powder: 10 ~ 33 parts; Thickening material: 8 ~ 18 parts, asphalt powder: 3 ~ 8 parts; Glydol n 2002:0.2 ~ 0.5 part; Additional bonding agent: 12 ~ 14.5 parts, nano-cellulose 0.1; Described thickening material is the weight ratio 1:1 mixture of vanadium iron ore deposit and cupric oxide.

As of the present invention preferred, the rear blown-out shot mud of described use need pass through crusher in crushing, chooses the particle of 1-0mm; Described yttrium mullite has referred in the mullite lattice solid solution extraordinary mullite of yttrium oxide, its yttrium oxide solid solubility is 2.5%; The material of described coal gangue rawore for mining and peeling off.

As of the present invention preferred, described modification magnesium iron aluminium Pre-synthesized spinel fine powder is 220 orders, and chemical constitution is magnesium oxide 10%, ferric oxide 35%, aluminum oxide 53%, zirconium white 2%; The spent cathodes that regeneration graphite electrode powder is steel-making use, wears into 325 order fine powders; Vanadium iron ore deposit is 325 more than 80% order fine powders of technical grade content; Cupric oxide is 200 object powder; Asphalt powder carbon yield 40%, 110 ℃ of softening temperatures; Glydol n 2002 is a kind of properties-correcting agent, can prevent organism volatilization, can make ion-exchange occur larger reversibility, after breeching, makes stemming can return to faster original performance; Nano-cellulose is a kind of Biodegradable material, can increase the ventilation property in stemming use procedure.

As of the present invention preferably, this bonding agent is by the modification bonding agent obtaining with sodium peroxide Hybrid Heating by tar.As preferably, the benzopyrene content of described modification bonding agent is not more than 100ppm.

In sum, the present invention compared with prior art, has following outstanding advantages and beneficial effect:

The present invention compares with existing stemming product, owing to having added magnesium iron aluminium Pre-synthesized spinel powder and thickening material, can in use repair iron mouth, and promotes to have repaired the sintering of iron mouth, prevents the iron notch function of reaming again.

This product is compared with existing stemming, adds after Glydol n 2002, and the shelf time is long, and after long-term storage, properties does not decline; The nano-cellulose adding can guarantee the ventilation property of stemming, can not form the spray rocket phenomenon of molten iron in use procedure.

This product is lower than cost with existing stemming, selects the low materials of cost such as soft coal spoil, blown-out shot mud, has obviously reduced the cost of stemming, can meet again the normal needs of producing of blast furnace completely; Add modified clay, improved plasticity and the activity of stemming, more favourable to repairing iron notch.

Use after the present invention, iron notch is maintained, and blast furnace is produced normal, stemming prices, for enterprise and user have saved cost, can thoroughly change current State of Blast Furnace before iron mouth shoal, stemming is seriously polluted, high in cost of production problem.

Embodiment

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

Embodiment 1: a kind of for 1080m ³blast furnace mud, is characterized in that described blast furnace mud is comprised of the component of following weight part: with rear blown-out shot mud: 10 ~ 20 parts; Yttrium mullite: 5 ~ 15 parts; Coal gangue rawore: 10 ~ 20 parts; Modification ferro-magnesium-aluminum spinelle powder: 10 ~ 25 parts; Modified clay: 10 ~ 20 parts; Regeneration graphite electrode powder: 10 ~ 35 parts; Thickening material: 8 ~ 18 parts, asphalt powder: 3 ~ 8 parts; Glydol n 2002:0.2 ~ 0.5 part; Additional bonding agent: 14.5 parts, nano-cellulose 0.1.The preparation method of stemming: all raw materials are put into mixing pan, first pre-mixing 10 minutes; Then add 90% of bonding agent total amount, wet stone roller 30 minutes; Add 10% remaining bonding agent, rewetting is ground 10 minutes; Through the section of stemming slicing machine, then through mud extruder, squeeze mud moulding, pack, is finished product; Squeezing mud Temperature Setting is 65 ℃.

Embodiment 2: a kind of for 2500m ³blast furnace mud, is characterized in that described blast furnace mud is comprised of the component of following weight part: with rear blown-out shot mud: 10 ~ 20 parts; Yttrium mullite: 5 ~ 15 parts; Coal gangue rawore: 10 ~ 20 parts; Modification ferro-magnesium-aluminum spinelle powder: 10 ~ 25 parts; ; Modified clay: 10 ~ 20 parts; Regeneration graphite electrode powder: 10 ~ 35 parts; Thickening material: 8 ~ 18 parts, asphalt powder: 3 ~ 8 parts; Glydol n 2002:0.2 ~ 0.5 part; Additional bonding agent: 14 parts, nano-cellulose 0.1.The preparation method of stemming: all raw materials are put into mixing pan, first pre-mixing 10 minutes; Then add 90% of bonding agent total amount, wet stone roller 30 minutes; Add 10% remaining bonding agent, rewetting is ground 10 minutes; Through the section of stemming slicing machine, then through mud extruder, squeeze mud moulding, pack, is finished product; Squeezing mud Temperature Setting is 72 ℃.

Embodiment 3: a kind of for 3200m ³blast furnace mud, is characterized in that described blast furnace mud is comprised of the component of following weight part: with rear blown-out shot mud: 10 ~ 20 parts; Yttrium mullite: 5 ~ 15 parts; Coal gangue rawore: 10 ~ 20 parts; Modification ferro-magnesium-aluminum spinelle powder: 10 ~ 25 parts; Modified clay: 10 ~ 20 parts; Regeneration graphite electrode powder: 10 ~ 35 parts; Thickening material: 8 ~ 18 parts, asphalt powder: 3 ~ 8 parts; Glydol n 2002:0.2 ~ 0.5 part; Additional bonding agent: 13 parts, nano-cellulose 0.1.The preparation method of stemming: all raw materials are put into mixing pan, first pre-mixing 10 minutes; Then add 90% of bonding agent total amount, wet stone roller 30 minutes; Add 10% remaining bonding agent, rewetting is ground 10 minutes; Through the section of stemming slicing machine, then through mud extruder, squeeze mud moulding, pack, is finished product; Squeezing mud Temperature Setting is 65 ℃.

Embodiment 4: a kind of for 5800m ³blast furnace mud, is characterized in that described blast furnace mud is comprised of the component of following weight part: with rear blown-out shot mud: 10 ~ 20 parts; Yttrium mullite powder: 5 ~ 15 parts; Coal gangue rawore: 10 ~ 20 parts; Modification ferro-magnesium-aluminum spinelle: 10 ~ 25 parts; Modified clay: 10 ~ 20 parts; Regeneration graphite electrode powder: 10 ~ 35 parts; Thickening material: 8 ~ 18 parts, asphalt powder: 3 ~ 8 parts; Glydol n 2002:0.2 ~ 0.5 part; Additional bonding agent: 12 parts, nano-cellulose 0.1.The preparation method of stemming: all raw materials are put into mixing pan, first pre-mixing 10 minutes; Then add 90% of bonding agent total amount, wet stone roller 30 minutes; Add 10% remaining bonding agent, rewetting is ground 10 minutes; Through the section of stemming slicing machine, then through mud extruder, squeeze mud moulding, pack, is finished product; Squeezing mud Temperature Setting is 65 ℃.

The performance test results of above-described embodiment 1 ~ 4 sees the following form

Its use after situation as follows: easily beat mud, iron mouth appropriate depth, mean pressure big gun 20 minutes, sintering is rapid, anti-slag iron aggressiveness is good, iron mouth is safeguarded obviously, does not emit tobacco, stokehold Working environment be improved significantly.

This specific embodiment is only explanation of the invention; it is not the restriction to invention; those skilled in the art can make any modification to the present embodiment as required after reading this specification sheets, but as long as within the scope of claim of the present invention, are all subject to the protection of patent law.

Claims

1. a novel environment friendly blast furnace mud, is characterized in that described blast furnace mud is comprised of the component of following weight part: with rear blown-out shot mud: 10 ~ 20 parts; Yttrium mullite: 5 ~ 15 parts; Coal gangue rawore: 10 ~ 20 parts; Modification ferro-magnesium-aluminum spinelle powder: 10 ~ 25 parts; Modified clay: 10 ~ 20 parts; Regeneration graphite electrode powder: 10 ~ 33 parts; Thickening material: 8 ~ 18 parts, asphalt powder: 3 ~ 8 parts; Glydol n 2002:0.2 ~ 0.5 part; Additional bonding agent: 12 ~ 14.5 parts, nano-cellulose 0.1; Described thickening material is the weight ratio 1:1 mixture of vanadium iron ore deposit and cupric oxide.

2. a kind of novel environment friendly blast furnace mud according to claim 1, is characterized in that: described modification magnesium iron aluminium Pre-synthesized spinel fine powder is 220 orders, and chemical constitution is magnesium oxide 10%, ferric oxide 35%, aluminum oxide 53%, zirconium white 2%.

3. the modified clay described in is that the product obtaining after part water is sloughed in mud 500 ℃ of insulations in Guangxi for 3 hours.

4. the yttrium mullite described in has referred in the mullite lattice solid solution extraordinary mullite of yttrium oxide, its yttrium oxide solid solubility is 2.5%.

5. a kind of novel environment friendly blast furnace mud according to claim 1, is characterized in that: described additional bonding agent is the low benzopyrene tar of modification.

6. the preparation method of a kind of novel environment friendly blast furnace mud as claimed in claim 1, is characterized in that adopting following processing method to make: all above-mentioned raw materials to be put into mixing pan, first pre-mixing 10 minutes; Then add 90% of bonding agent total amount, wet stone roller 30 minutes; Add 10% remaining bonding agent, rewetting is ground 10 minutes; Through the section of stemming slicing machine, then through mud extruder, squeeze mud moulding, pack packing bag into, be finished product; Squeezing mud Temperature Setting is 65 ℃.