CN103060525B - Process for high pressure compaction of fluorite ball with sodium silicate as binder - Google Patents

Process for high pressure compaction of fluorite ball with sodium silicate as binder Download PDF

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Publication number
CN103060525B
CN103060525B CN201210573213.4A CN201210573213A CN103060525B CN 103060525 B CN103060525 B CN 103060525B CN 201210573213 A CN201210573213 A CN 201210573213A CN 103060525 B CN103060525 B CN 103060525B
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fluorite
content
sodium silicate
ball
breeze
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CN103060525A (en
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翁水生
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Chenzhou Deyu High-tech Materials Co., Ltd.
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FOGANG DEYU FLUORITE BALL Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The invention discloses a process for high pressure compaction of a fluorite ball with sodium silicate as a binder. The process comprises the following steps: uniformly mixing fluorite flotation powder, fluorite ore powder and a sodium silicate solution in a mixer; placing an obtained mixed material in a high pressure ball press machine for extrusion so as to obtain a ball; and roasting and cooling the ball. The fluorite ball obtained through high pressure compaction with sodium silicate as the binder has a high grade, a wide and high range (with the content of CaF2 in a range of 75 to 95 wt% and normally no less than 85 wt%), a reasonable reaction specific surface area and performances and mechanical strength satisfying requirements for a flux used in metal smelting. The fluorite ball provided by the invention can be extensively used in metal smelting in a blast furnace and for special steel, stainless steel (all the varieties), nonferrous metals and the like and enables a slugging speed to be accelerated and smelting time to be shortened; compared with a fluorite block, application amount of the fluorite ball is greatly reduced, and production cost and the quantity of discharged slag are reduced.

Description

Take water glass as the technique that bonding agent carries out high pressure compacting Fluorite pellet
Technical field
The present invention relates to a kind of technique taking water glass as bonding agent and carry out high pressure compacting Fluorite pellet.
Background technology
Fluorite has the fusing point of infusibility material in Metal smelting processes such as reducing special steel, stainless steel, iron alloy, non-ferrous metal, promote slag flowing, make the characteristic that slag and metal are separated very well, as fusing assistant in smelting iron and steel, J. sigillate, change iron process and nonferrous metallurgical process, be widely used in desulfurization, dephosphorization, the forging property of enhancing metal and tensile strength etc.Smelting fluorite ore general requirement grade is CaF 2the lump ore of content>=more than 70wt%, but by resource limit, in be becoming tight high-grade fluorite lump ore day, and cost is unprecedented soaring, and the fluorite raw ore block of the oxide compounds such as low-grade, high FeO, MnO, powder are a lot, the low-grade high impurity particularly produced through ore dressing with nonferrous metals ore symbiosis is rich in CaF 2pile up like a mountain for mine tailing, hopeless, wastes resource and contaminate environment, how to dispose these wastes, and proposing a kind of effective method of resource becomes the social problem extremely paid close attention to.
In order to effective head it off, first CaF is rich in low-grade fluorite block, powder 2mine tailing carries out flotation, and grade is brought up to CaF 2content>=75wt%, secondly suitable agglomeration process is carried out to the higher-grade fluorite powder after flotation, to make it can be used for Metal smelting, the Fluorite pellet obtained has compared with higher-grade, higher-strength, to can be used for ordinary steel, special steel, stainless steel, blast furnace, non-ferrous metal metallurgy then urgently to be resolved hurrily to make must to find a kind of rational technique.
Summary of the invention
The object of this invention is to provide a kind of technique taking water glass as bonding agent and carry out high pressure compacting Fluorite pellet.
The technical solution used in the present invention is:
Take water glass as the technique that bonding agent carries out high pressure compacting Fluorite pellet, comprise the following steps: fluorite powder, fluorite breeze, sodium silicate solution are first inserted mixer and mixed, this mixture is placed in high-pressure ball press and extrudes balling-up, then ball is cured, cool.
The mass percent of sodium silicate solution in mixture is 2.5-8.5%.
The order number of described fluorite powder is 40-300 order; Fluorite ore particle degree≤3mm, wherein, the mass percent ﹥ 70% shared by 1-3mm granularity.
With the quality of fluorite powder, fluorite breeze be 100% calculating, the mass percent of fluorite powder is 50-100%, and surplus is fluorite breeze; Or the mass percent of fluorite breeze is 70-100%, surplus is fluorite powder.
CaF in described fluorite powder 2content at more than 75wt%, CaF in fluorite breeze 2content at more than 75wt%.
Described sodium silicate solution concentration is 40-52 ° of B é, and the modulus of the water glass in solution is 3.3-2.2.
Described mixer is planet-style wheel roller mixer.
The line specific pressure of described high-pressure ball press is 5-11t/cm.
Described stoving temperature is 120-300 DEG C.
After being cured by ball, cooling, gained sphere volume is 12.51-41.67cm3, and density is 2.75-2.85g/cm3.
The invention has the beneficial effects as follows: water glass of the present invention is the of high grade of the high pressure compacting Fluorite pellet of bonding agent, the wide and high (CaF of scope 2content 75-95wt%, general>=85wt%), have and reasonably react specific surface area, possess the performance and physical strength that meet fusing assistant required by Metal smelting simultaneously.Fluorite pellet of the present invention is widely used in the Metal smelting such as ordinary steel, special steel, stainless steel (all kinds), blast furnace, non-ferrous metal, can raising slag speed, shorten the heat, compared with fluorite block, be that usage quantity significantly reduces, reduce production cost and bed drain purge.
In addition, in the present invention, the consumption of tackiness agent water glass is less, and therefore, in the Fluorite pellet made, the value that the content of its Calcium Fluoride (Fluorspan) reduces relative to the content of Calcium Fluoride (Fluorspan) in fluorite powder is less, namely achieves CaF 2product potential drop point is low.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further:
embodiment 1:
By fluorite powder (order number is 100-300 order), fluorite breeze, (granularity is≤3mm, in this fluorite breeze, mass percent >=70% shared by fluorite breeze that granularity is 1-3mm), sodium silicate solution inserts planet-style wheel roller mixer and mixes, again mixture is placed in high-pressure ball press (line specific pressure: 7.5t/cm) extruding balling-up, again ball is baked and banked up with earth, cure 3.0h at temperature 150-220 DEG C of temperature, cool.
The concentration of described sodium silicate solution is 52 ° of B é, and the modulus of the water glass in solution is 2.4, and the mass percent of this sodium silicate solution in mixture is 5%.
With the quality of fluorite powder, fluorite breeze be 100% calculating, the mass percent of fluorite powder is 90%, and surplus is fluorite breeze.
In described fluorite powder, CaF 2content>=88wt%, SiO 2content≤the 0.06wt% of the content of content≤9wt%, S≤0.1wt%, P.
In described fluorite breeze, CaF 2content>=80wt%, SiO 2content≤the 0.06wt% of the content of content≤14wt%, S≤0.15wt%, P.
embodiment 2:
By fluorite powder (order number is 100-300 order), fluorite breeze, (granularity is≤3mm, in this fluorite breeze, mass percent >=70% shared by fluorite breeze that granularity is 1-3mm), sodium silicate solution inserts in planet-style wheel roller mixer and mixes, again mixture is inserted extruding balling-up in (line specific pressure: 6t/cm) in high-pressure ball press, again ball is cured, cure 3.0h at temperature 120-180 DEG C of temperature, cool.
The concentration of described sodium silicate solution is 52 ° of B é, and the modulus of the water glass in solution is 2.4, and the mass percent of this sodium silicate solution in mixture is 3.5%.
With fluorite powder, fluorite powdered ore quality be 100% calculating, fluorite powdered ore quality per-cent is 70%, and surplus is fluorite powder.
In described fluorite powder, CaF 2content>=88wt%, SiO 2content≤the 0.06wt% of the content of content≤9wt%, S≤0.1wt%, P.
In described fluorite breeze, CaF 2content>=80wt%, SiO 2content≤the 0.06wt% of the content of content≤14wt%, S≤0.15wt%, P.
embodiment 3:
By fluorite powder (order number is 100-300 order), fluorite breeze, (granularity is≤3mm, in this fluorite breeze, mass percent >=70% shared by fluorite breeze that granularity is 1-3mm), sodium silicate solution inserts in planet-style wheel roller mixer and mixes, again mixture is inserted compacting balling-up in (line specific pressure: 7.5t/cm) in high-pressure ball press, again ball is baked and banked up with earth, cure 3.0h at temperature 150-220 DEG C of temperature, cool.
The concentration of described sodium silicate solution is 45 ° of B é, and the modulus of the water glass in solution is 2.8, and the mass percent of this sodium silicate solution in mixture is 5.5%.
With the quality of fluorite powder, fluorite breeze be 100% calculating, the mass percent of fluorite powder is 90%, and surplus is fluorite breeze.
In described fluorite powder, CaF 2content>=88wt%, SiO 2content≤the 0.06wt% of the content of content≤9wt%, S≤0.1wt%, P.
In described fluorite breeze, CaF 2content>=80wt%, SiO 2content≤the 0.06wt% of the content of content≤14wt%, S≤0.15wt%, P.
embodiment 4:
By fluorite powder (order number is 100-300 order), fluorite breeze, (granularity is≤3mm, in this fluorite breeze, mass percent >=70% shared by fluorite breeze that granularity is 1-3mm), sodium silicate solution inserts in planet-style wheel roller mixer and mixes, again mixture is inserted compacting balling-up in (line specific pressure: 6t/cm) in high-pressure ball press, again ball is baked and banked up with earth, cure 3.0h at temperature 120-180 DEG C of temperature, cool.
The concentration of described sodium silicate solution is 45 ° of B é, and the modulus of the water glass in solution is 2.8, and the mass percent of this sodium silicate solution in mixture is 4%.
With fluorite powder, fluorite powdered ore quality be 100% calculating, fluorite powdered ore quality per-cent is 70%, and surplus is fluorite powder.
In described fluorite powder, CaF 2content>=88wt%, SiO 2content≤the 0.06wt% of the content of content≤9wt%, S≤0.1wt%, P.
In described fluorite breeze, CaF 2content>=80wt%, SiO 2content≤the 0.06wt% of the content of content≤14wt%, S≤0.15wt%, P.
embodiment 5:
Fluorite powder (order number is 40-120 order), sodium silicate solution are inserted in planet-style wheel roller mixer and mixed, again mixture is inserted compacting balling-up in (line specific pressure: 7 t/cm) in high-pressure ball press, again ball is baked and banked up with earth, cure 3.0h at temperature 120-180 DEG C of temperature, cool.
The concentration of described sodium silicate solution is 52 ° of B é, and the modulus of the water glass in solution is 2.4, and the mass percent of this sodium silicate solution in mixture is 4%.
In described fluorite powder, CaF 2content>=88wt%, SiO 2content≤the 0.06wt% of the content of content≤9wt%, S≤0.1wt%, P.
embodiment 6:
Fluorite powder (order number is 100-300 order), sodium silicate solution are inserted in planet-style wheel roller mixer and mixed, again mixture is inserted (line specific pressure: 8t/cm) in high-pressure ball press and suppress balling-up, again ball is baked and banked up with earth, cure 3.0h at temperature 180-250 DEG C of temperature, cool.
The concentration of described sodium silicate solution is 52 ° of B é, and the modulus of the water glass in solution is 2.4, and the mass percent of this sodium silicate solution in mixture is 6%.
In described fluorite powder, CaF 2content>=88wt%, SiO 2content≤the 0.06wt% of the content of content≤9wt%, S≤0.1wt%, P.
The inorganic ultimate compression strength in conjunction with Fluorite pellet that embodiment 1-6 obtains is at 5.5N-6.3 N ∕ mm 2between, Fluorite pellet is freely dropped on steel plate in the place that 2m is high, measures dropping strength, after tested, repeat to fall 4 times, all not broken.
Inorganic performance and the physical strength meeting fusing assistant required by Metal smelting in conjunction with Fluorite pellet of the present invention, be applied to ordinary steel, special steel, stainless steel, blast furnace, non-ferrous metal metallurgy, can raising slag speed, shorten the heat, usage quantity significantly reduces compared with fluorite block, reduces production cost and bed drain purge.
Fluorite pellet obtained by the present invention, wherein contained binding agent can fall by part high temperature evaporation in stove, and part enters in slag, and molten steel can not be caused to pollute, and nontoxic; In addition, be of the present inventionly inorganicly used for metallurgy industry in conjunction with the alternative high-grade fluorite lump ore of Fluorite pellet, globule size is unification comparatively, best in quality, is highly suitable for steel mill digitizing and smelts.
The volume of the Fluorite pellet that the present invention obtains is between 12.51-41.67cm3, and density is at 2.75-2.85g/cm3.

Claims (1)

1. be the technique that bonding agent carries out high pressure compacting Fluorite pellet with water glass, it is characterized in that: comprise the following steps: fluorite powder, fluorite breeze, sodium silicate solution are inserted planet-style wheel roller mixer and mixed, again mixture is placed in high-pressure ball press and extrudes balling-up, again ball is baked and banked up with earth, cure 3.0h at temperature 150-220 DEG C of temperature, cool;
The concentration of described sodium silicate solution is 52 ° of B é, and the modulus of the water glass in solution is 2.4, and the mass percent of this sodium silicate solution in mixture is 5%;
With the quality of fluorite powder, fluorite breeze be 100% calculating, the mass percent of fluorite powder is 90%, and surplus is fluorite breeze;
In described fluorite powder, CaF 2content>=88wt%, SiO 2content≤the 0.06wt% of the content of content≤9wt%, S≤0.1wt%, P;
In described fluorite breeze, CaF 2content>=80wt%, SiO 2content≤the 0.06wt% of the content of content≤14wt%, S≤0.15wt%, P;
Wherein, the order number of described fluorite powder is 100-300 order; The granularity of described fluorite breeze is≤3mm, in this fluorite breeze, and mass percent >=70% shared by fluorite breeze that granularity is 1-3mm;
The line specific pressure of high-pressure ball press is 7.5t/cm.
CN201210573213.4A 2012-12-26 2012-12-26 Process for high pressure compaction of fluorite ball with sodium silicate as binder Active CN103060525B (en)

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CN103667692B (en) * 2014-01-02 2016-01-27 嘉峪关市园通新型保温材料有限责任公司 A kind of combined Fluorspar Powder pelletizing binder and application thereof
CN104451031B (en) * 2014-10-24 2016-09-14 广德县瑞龙新型材料有限公司 A kind of preparation technology of Fluorite pellet
CN104451190B (en) * 2014-11-14 2016-09-14 广德林峰科技有限公司 A kind of production technology of Fluorite pellet
CN105463189A (en) * 2015-12-30 2016-04-06 广德林峰科技有限公司 Production process of fluorite balls
CN110117182B (en) * 2019-06-12 2021-04-02 湖南有色郴州萤石球团有限公司 Method for producing fluorite pellets

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CN102634718B (en) * 2012-04-28 2013-10-30 广州德曼冶金材料有限公司 Preparation process for organically-combined fluorite ball
CN102703686B (en) * 2012-05-02 2013-12-18 佛冈德宇萤石球有限公司 Production process of inorganically combined fluorite balls
CN102776325A (en) * 2012-08-16 2012-11-14 大余县萤通工贸有限公司 Fluorite pellet and method for producing same

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Effective date of registration: 20190128

Address after: 424202 Hongyuan Company, Baishidu Fluorine Chemical Cycle Industrial Park, Yizhang County, Chenzhou City, Hunan Province

Patentee after: Chenzhou Deyu High-tech Materials Co., Ltd.

Address before: 510370 Red Cotton Tower 903 Beili Road, Liwan District, Guangzhou City, Guangdong Province

Patentee before: Fogang Deyu Fluorite Ball Co., Ltd.

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