CN106676287A - Boron slurry utilization method - Google Patents

Boron slurry utilization method Download PDF

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Publication number
CN106676287A
CN106676287A CN201710020858.8A CN201710020858A CN106676287A CN 106676287 A CN106676287 A CN 106676287A CN 201710020858 A CN201710020858 A CN 201710020858A CN 106676287 A CN106676287 A CN 106676287A
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boron mud
reducing agent
carbonaceous reducing
quick lime
calcium fluoride
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CN201710020858.8A
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CN106676287B (en
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于洪翔
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Beris Engineering and Research Corp
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Beris Engineering and Research Corp
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/20—Obtaining alkaline earth metals or magnesium
    • C22B26/22—Obtaining magnesium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/16—Sintering; Agglomerating
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C22B1/14—Agglomerating; Briquetting; Binding; Granulating
    • C22B1/24—Binding; Briquetting ; Granulating
    • C22B1/242—Binding; Briquetting ; Granulating with binders
    • C22B1/244—Binding; Briquetting ; Granulating with binders organic
    • C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Solid Wastes (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention provides a boron slurry utilization method. The boron slurry utilization method comprises the steps that (1) boron slurry is dried and fed into a rotary kiln or a heating furnace to be roasted to obtain roasted boron slurry; (2) the roasted boron slurry, quick lime, a carbonaceous reducer and calcium fluoride are separately smashed and levigated and uniformly mixed according to a proportion to obtain a mixture; (3) the mixture is heated and pressed into pellets to obtain the hot-pressed pellets; and (4) the hot-pressed pellets are put into a reduction furnace with a magnesium crystallizer to be reduced and cooled after reduction is completed to obtain the metal magnesium. By adoption of the boron slurry utilization method, efficient utilization of the boron slurry is achieved, pollution of the boron slurry to the environment is reduced, and the high added-value product, namely, the metal magnesium is obtained.

Description

A kind of Application way of boron mud
Technical field
The invention belongs to Metallurgical resources field of comprehensive utilization, in particular it relates to a kind of Application way of boron mud.
Background technology
Boron mud is the residue of chemical plant boromagnesite or ludwigite standby Borax made of stones.Boron mud color is light brown, Belong to indissoluble material, the new boron mud for producing is contained within 30% or so Free water, and boron mud is in alkalescence.Boron mud main component is MgO And SiO2, and containing a certain amount of Fe2O3、B2O3With a small amount of CaO, Al2O3Deng.
If not dealing carefully with boron mud, the alkaline matter in boron mud can affect environment, polluted source, cause that not even a blade of grass grows； Boron mud granule racks to finish the meeting and air is polluted.
1 ton of Borax of production needs 4 tons or so B2O3Grade is 12% boromagnesite, about produces 4 tons of boron mud.Reform is opened After putting, as Borax is in the extensive application of industry-by-industry, the annual production of Borax is increased considerably, and the yield of boron mud also increases therewith Plus.Liaoning Province's boron mud total amount is more than 20,000,000 tons.Particularly in recent years, the increase year by year with Borax annual production and raw ore The reduction of grade, the total amount of boron mud is being continuously increased, and the raw material that abundance is provided to large-scale develop and utilize boron mud ensures.
The domestic research for paying much attention to boron mud using technology at present, such as production concrete, prepares foam glass, prepares foam Viscous brick etc..Boron mud is used as into the raw material of agglomerates of sintered pellets, the intensity and yield of pelletizing is improved.It is dirty using boron mud as flocculant process Water.
At present the extraction of magnesium elements has following two methods in boron mud：
A kind of method is, using Borax production equipment, to be operated using boron mud-carbonatation process technique, after boron mud pretreatment Digested, carburizing reagent, Jing filtering, pyrolysis, semi-finished product that aqueous 70% or so is obtained after filter pressing, obtain after 150 DEG C of dryings Magnesium carbonate.Magnesium carbonate drying and calcining at 800 DEG C obtains magnesium oxide, and the overall recovery of magnesium is 65%.
Another kind of method is to make boron mud leaching agent using industrial sulphuric acid, through leaching, cohesion, vacuum filter, flotation, wadding Solidifying, vacuum filter obtains Adlerika.With sodium carbonate as precipitant, the Adlerika after purification is precipitated, filtered, washed Wash, be dried, calcination processing obtains magnesium oxide.
The product of both the above method is magnesium oxide, and in actual applications, often based on applied metal magnesium, therefore also Need to be further processed the product of both the above method, there is a problem of complex operation step.
The content of the invention
The goal of the invention of the present invention is the defect for prior art, there is provided a kind of Application way of boron mud.
The Application way of the boron mud of the present invention, comprises the steps：
(1) boron mud is dried, is subsequently sent to rotary kiln or heating kiln roasting obtains the boron mud after roasting；
(2) boron mud after roasting, quick lime, carbonaceous reducing agent and calcium fluoride are crushed respectively and levigate, subsequently by default Ratio mix homogeneously obtains mixture；
(3) mixture is heated and is pressed into pelletizing and obtain hot pressing pelletizing；
(4) hot pressing pelletizing is put in the reduction furnace with magnesium crystallizer and is reduced, reduction is cooled down after terminating, and is obtained Obtain magnesium metal.
Aforesaid method, in step (1), sintering temperature is 700-920 DEG C.
Aforesaid method, in step (2), the boron mud after roasting, quick lime, carbonaceous reducing agent and calcium fluoride is crushed respectively And it is levigate to particle diameter in below 0.1mm.
Aforesaid method, in step (2), preset ratio is as follows：
The proportioning of quick lime and boron mud is：(calcium oxide gross mass in quick lime and boron mud)/it is (siliceous in boron mud Amount) it is 1-2；
Carbonaceous reducing agent amount of allocating is：(fixed carbon quality in carbonaceous reducing agent)/(quality+ferrum oxide of oxygen in magnesium oxide The quality of middle oxygen) it is 0.825-1.65；
The amount of allocating of calcium fluoride is：The quality of calcium fluoride/(total matter of boron mud, carbonaceous reducing agent, quick lime and calcium fluoride Amount) it is 0.02-0.05.
Aforesaid method, in step (3), heats the mixture to 430-530 DEG C and maintains 3-5 minutes, afterwards will mixing Thing is pressed into pelletizing.
Aforesaid method, in pressure≤500Pa and temperature is reduced under conditions of 1150-1500 DEG C in step (4) 40-240 minutes.
Aforesaid method, in step (4), after reduction terminates, argon is passed through in reduction furnace and furnace temperature is cooled to into 600 Below DEG C.
Aforesaid method, the carbonaceous reducing agent is coke or coal.
Aforesaid method, the hot pressing pelletizing is elliposoidal.
Relative to prior art, the method for the present invention realizes effectively utilizes for boron mud, reduces boron mud to environment Pollution, and obtain high value added product magnesium metal.
Description of the drawings
Fig. 1 is the process chart of the inventive method.
Specific embodiment
In order to be fully understood by the purpose of the present invention, feature and effect, by following specific embodiments, detailed is made to the present invention Describe in detail bright.In addition to the description below, remaining is using the conventional method or device of this area for the process of the present invention.
The method of the present invention is directed to chemical plant boromagnesite or the ludwigite boron mud for produced by Borax made of stones Residue, its color is light brown, belongs to indissoluble material.According to chemical analyses, the composition of boron mud is mainly：Content of MgO is in 20- Between 45% (weight), SiO2Content is between 5-35%, B2O3Content is between 0.5-6%, Fe2O3Content 3-18% it Between, CaO content is between 1-5%, Al2O3Content is between 0-5%.It is main by Mg in boron mud according to XRD analysis2SiO4With MgCO3Composition.
With reference to Fig. 1, the method for the present invention is described in detail.The boron mud Application way of the present invention includes following step Suddenly：
The first step, is dried and roasting to boron mud.
Boron mud is dried first, subsequently boron mud is sent in rotary kiln or heating furnace, at a temperature of 700-920 DEG C Carry out roasting.By high-temperature roasting, the Free water and water of crystallization in boron mud is divested, also, in roasting, in boron mud MgCO3Decompose and generate MgO and CO2。
Second step, by material it is broken, levigate and mix homogeneously obtains mixture.
Boron mud after roasting, quick lime, carbonaceous reducing agent and calcium fluoride are crushed respectively and levigate.Specifically, by roasting Rear boron mud is broken, it is levigate to particle diameter in below 0.1mm；By quick lime (i.e. calcium oxide) it is broken, it is levigate to particle diameter in 0.1mm； By carbonaceous reducing agent (for example, coke or coal) it is broken, it is levigate to particle diameter in below 0.1mm；By calcium fluoride it is broken, it is levigate extremely Below 0.1mm.
Above-mentioned quick lime, carbonaceous reducing agent and calcium fluoride can by conventional city available from.
By material it is broken with it is levigate after, each material mix homogeneously is obtained into mixture according to preset ratio.Wherein, preset Ratio is specific as follows：
The proportioning of quick lime and boron mud is：(calcium oxide gross mass in quick lime and boron mud)/it is (siliceous in boron mud Amount) it is 1-2；
Carbonaceous reducing agent amount of allocating is：(fixed carbon quality in carbonaceous reducing agent)/(quality+ferrum oxide of oxygen in magnesium oxide The quality of middle oxygen) it is 0.825-1.65；
The amount of allocating of calcium fluoride is：The quality of calcium fluoride/(total matter of boron mud, carbonaceous reducing agent, quick lime and calcium fluoride Amount) it is 0.02-0.05.
Above-mentioned preset ratio is conducive to the carrying out reacted in subsequent reduction step.
3rd step, prepares hot pressing pelletizing.
The mixture that second step is obtained is heated to into 430-530 DEG C, carbonaceous reducing agent occurs fierce in the temperature range Depolymerization reaction, generate the larger sticky liquid phase component of the gaseous component and molecular weight of a large amount of molecular weights.In the temperature In the range of maintain 3-5 minutes, then mixture is pressed into into pelletizing and obtains hot pressing pelletizing.Have using hot pressing pelletizing process following Advantage：Binding agent is not used, low temperature intensity is high, elevated temperature strength is high, increased the contact area between each material, and reproducibility It is good.
The hot pressing pelletizing for obtaining is preferably elliposoidal, is conducive to fully carrying out for sequential reduction reaction.
4th step, reduction and acquisition product.
Hot pressing pelletizing is put in the reduction furnace with magnesium crystallizer, is 1150-1500 DEG C in pressure≤500Pa and temperature Under the conditions of carry out reduce 40-240 minutes.Reduction terminate after, be passed through in reduction furnace argon and by furnace temperature be cooled to 600 DEG C with Under, magnesium crystallizer is taken out, obtain magnesium metal.
In reduction furnace, under vacuum and hot conditionss, carbonaceous reducing agent magnesium oxide forms magnesium steam and carbon monoxide. Carbon monoxide is removed by reaction system by vacuum environment, while allowing magnesium steam that magnesium metal is condensed at crystallizer, it is ensured that anti- Should carry out towards the direction for generating magnesium.
In 2MgOSiO present in boron mud2Because the presence of CaO can occur following reaction under high temperature：
2MgO·SiO2(s)+2CaO (s)=2MgO (s)+2CaOSiO2(s) ΔGθ=-51600-15.61T
The reaction is conducive to constantly forming free magnesium oxide in system, and magnesium oxide continues by carbonaceous reducing agent, shape Into magnesium steam, magnesium steam condensation is on crystallizer.
The small amounts boron existed in pelletizing can form stable slag system with calcium oxide, silicon oxide, promote reaction to carry out.Body The calcium fluoride existed in system is conducive to increasing the mobility of slag, to having reacted catalytic action.
As a result of above mentioned preset ratio so that each reaction of reduction step is fully carried out, and ensure to produce Waste minimization.
Above-mentioned magnesium crystallizer is the conventional equipment of this area.
After 4th EOS, waste residue is discharged, continue to add raw material, be that reaction proceeds.
Embodiment
The present invention is further illustrated below by the mode of embodiment, but does not therefore limit the present invention to described reality Among applying a scope.The experimental technique of unreceipted actual conditions in the following example, conventionally and condition, or according to business Product description is selected.
From the garbage produced by certain Borax production plant, its composition is the boron mud adopted in following embodiments：MgO contains Amount 35.94wt%, SiO2Content 24.41wt%, B2O3Content 3.8%, Fe2O3Content 7.7wt%, CaO content 4.4wt%, Al2O3Content 2.73wt%, Na2O content 0.89wt%, K2O content 0.63wt%, scaling loss content 19.5wt%.
The carbonaceous reducing agent adopted in following embodiments is commercial cheap coal dust.
Embodiment 1：
(1) boron mud is dried, sends into rotary kiln or heating furnace roasting, 700 DEG C of sintering temperature, slough wherein moisture and gas Body.
(2) it is the boron mud after roasting is broken, levigate to below 0.1mm；Quick lime is broken, levigate to 0.1mm；By carbonaceous Reducing agent is broken, levigate to below 0.1mm；Calcium fluoride is broken, levigate to below 0.1mm；
By levigate boron mud, quick lime, carbonaceous reducing agent, calcium fluoride according to following ratio mix homogeneously：
The proportioning of quick lime and boron mud is：(calcium oxide total amount in quick lime and boron mud)/(silicon dioxide quality in boron mud) For 1.8；Carbonaceous reducing agent amount of allocating is：(fixed carbon quality in carbonaceous reducing agent)/(in magnesium oxide in the quality+ferrum oxide of oxygen The quality of oxygen) it is 1.3；The amount of allocating of calcium fluoride is：The quality of calcium fluoride/(boron mud, carbonaceous reducing agent, quick lime, calcium fluoride Gross mass and) be 0.04.
(3) mixed material of step (2) is heated to into 430 DEG C, and maintains 5min at such a temperature, it is interior at such a temperature to incite somebody to action Mixed material is pressed into pelletizing.
(4) hot pressing pelletizing is inserted into the reduction furnace with magnesium crystallizer, under the conditions of 1500 DEG C of pressure≤500Pa and temperature Reduction, the time is 40min；Reduction terminates to be passed through argon in the backward reduction furnace with magnesium crystallizer, is cooled to less than 600 DEG C, Magnesium crystallizer is taken out, magnesium metal is obtained；Discharge waste residue；Continue to add raw material, proceed reaction.
Embodiment 2：
(1) boron mud is dried, sends into rotary kiln or heating furnace roasting, 750 DEG C of sintering temperature, slough wherein moisture and gas Body.
(2) it is the boron mud after roasting is broken, levigate to below 0.1mm；Quick lime is broken, levigate to 0.1mm；By carbonaceous Reducing agent is broken, levigate to below 0.1mm；Calcium fluoride is broken, levigate to below 0.1mm；
By levigate boron mud, quick lime, carbonaceous reducing agent, calcium fluoride according to following ratio mix homogeneously：
The proportioning of quick lime and boron mud is：(calcium oxide total amount in quick lime and boron mud)/(silicon dioxide quality in boron mud) For 2；Carbonaceous reducing agent amount of allocating is：(fixed carbon quality in carbonaceous reducing agent)/(oxygen in the quality+ferrum oxide of oxygen in magnesium oxide Quality) be 1.65；The amount of allocating of calcium fluoride is：The quality of calcium fluoride/(boron mud, carbonaceous reducing agent, quick lime, calcium fluoride Gross mass and) be 0.05.
(3) mixed material of step (2) is heated to into 530 DEG C, and maintains 3min at such a temperature, it is interior at such a temperature to incite somebody to action Mixed material is pressed into pelletizing.
(4) hot pressing pelletizing is inserted into the reduction furnace with magnesium crystallizer, under the conditions of 1300 DEG C of pressure≤500Pa and temperature Reduction, the time is 100min；Reduction terminates to be passed through argon in the backward reduction furnace with magnesium crystallizer, is cooled to less than 600 DEG C, Magnesium crystallizer is taken out, magnesium metal is obtained；Discharge waste residue；Continue to add raw material, proceed reaction.
Embodiment 3：
(1) boron mud is dried, sends into rotary kiln or heating furnace roasting, 860 DEG C of sintering temperature, slough wherein moisture and gas Body.
(2) it is the boron mud after roasting is broken, levigate to below 0.1mm；Quick lime is broken, levigate to 0.1mm；By carbonaceous Reducing agent is broken, levigate to below 0.1mm；Calcium fluoride is broken, levigate to below 0.1mm；
By levigate boron mud, quick lime, carbonaceous reducing agent, calcium fluoride according to following ratio mix homogeneously：
The proportioning of quick lime and boron mud is：(calcium oxide total amount in quick lime and boron mud)/(silicon dioxide quality in boron mud) For 1.4；Carbonaceous reducing agent amount of allocating is：(fixed carbon quality in carbonaceous reducing agent)/(in magnesium oxide in the quality+ferrum oxide of oxygen The quality of oxygen) it is 1；The amount of allocating of calcium fluoride is：The quality of calcium fluoride/(boron mud, carbonaceous reducing agent, quick lime, calcium fluoride it is total Quality and) be 0.03.
(3) mixed material of step (2) is heated to into 460 DEG C, and maintains 3min at such a temperature, it is interior at such a temperature to incite somebody to action Mixed material is pressed into pelletizing.
(4) hot pressing pelletizing is inserted into the reduction furnace with magnesium crystallizer, under the conditions of 1200 DEG C of pressure≤500Pa and temperature Reduction, the time is 160min；Reduction terminates to be passed through argon in the backward reduction furnace with magnesium crystallizer, is cooled to less than 600 DEG C, Magnesium crystallizer is taken out, magnesium metal is obtained；Discharge waste residue；Continue to add raw material, proceed reaction.
Embodiment 4：
(1) boron mud is dried, sends into rotary kiln or heating furnace roasting, 920 DEG C of sintering temperature, slough wherein moisture and gas Body.
(2) it is the boron mud after roasting is broken, levigate to below 0.1mm；Quick lime is broken, levigate to 0.1mm；By carbonaceous Reducing agent is broken, levigate to below 0.1mm；Calcium fluoride is broken, levigate to below 0.1mm；
By levigate boron mud, quick lime, carbonaceous reducing agent, calcium fluoride according to following ratio mix homogeneously：
The proportioning of quick lime and boron mud is：(calcium oxide total amount in quick lime and boron mud)/(silicon dioxide quality in boron mud) For 1；Carbonaceous reducing agent amount of allocating is：(fixed carbon quality in carbonaceous reducing agent)/(oxygen in the quality+ferrum oxide of oxygen in magnesium oxide Quality) be 0.83：The amount of allocating of calcium fluoride is：The quality of calcium fluoride/(boron mud, carbonaceous reducing agent, quick lime, calcium fluoride Gross mass and) be 0.02.
(3) mixed material of step (2) is heated to into 490 DEG C, and maintains 4min at such a temperature, it is interior at such a temperature to incite somebody to action Mixed material is pressed into pelletizing.
(4) hot pressing pelletizing is inserted into the reduction furnace with magnesium crystallizer, under the conditions of 1150 DEG C of pressure≤500Pa and temperature Reduction, the time is 240min；Reduction terminates to be passed through argon in the backward reduction furnace with magnesium crystallizer, is cooled to less than 600 DEG C, Magnesium crystallizer is taken out, magnesium metal is obtained；Discharge waste residue；Continue to add raw material, proceed reaction.

Claims (9)

1. a kind of Application way of boron mud, it is characterised in that comprise the steps：
(1) boron mud is dried, is subsequently sent to rotary kiln or heating kiln roasting obtains the boron mud after roasting；
(2) boron mud after roasting, quick lime, carbonaceous reducing agent and calcium fluoride are crushed respectively and levigate, subsequently by preset ratio Mix homogeneously obtains mixture；
(3) mixture is heated and is pressed into pelletizing and obtain hot pressing pelletizing；
(4) hot pressing pelletizing is put in the reduction furnace with magnesium crystallizer and is reduced, reduction is cooled down after terminating, obtain gold Category magnesium.
2. method according to claim 1, it is characterised in that in step (1), sintering temperature is 700-920 DEG C.
3. method according to claim 1, it is characterised in that in step (2), by the boron mud after roasting, quick lime, carbonaceous Reducing agent and calcium fluoride respectively crush and it is levigate to particle diameter in below 0.1mm.
4. method according to claim 1, it is characterised in that in step (2), preset ratio is as follows：
The proportioning of quick lime and boron mud is：(calcium oxide gross mass in quick lime and boron mud)/(silicon dioxide quality in boron mud) be 1-2；
Carbonaceous reducing agent amount of allocating is：(fixed carbon quality in carbonaceous reducing agent)/(oxygen in the quality+ferrum oxide of oxygen in magnesium oxide Quality) be 0.825-1.65；
The amount of allocating of calcium fluoride is：The quality of calcium fluoride/(gross mass of boron mud, carbonaceous reducing agent, quick lime and calcium fluoride) be 0.02-0.05。
5. method according to claim 1, it is characterised in that in step (3), heat the mixture to 430-530 DEG C simultaneously 3-5 minutes are maintained, afterwards mixture pelletizing is pressed into into.
6. method according to claim 1, it is characterised in that be 1150- in pressure≤500Pa and temperature in step (4) Carry out reducing 40-240 minutes under conditions of 1500 DEG C.
7. method according to claim 1, it is characterised in that in step (4), after reduction terminates, leads to in reduction furnace Enter argon and furnace temperature is cooled to into less than 600 DEG C.
8. method according to claim 1, it is characterised in that the carbonaceous reducing agent is coke or coal.
9. method according to claim 1, it is characterised in that the hot pressing pelletizing is elliposoidal.
CN201710020858.8A 2017-01-12 2017-01-12 A kind of utilization method of boron mud Active CN106676287B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1071967A (en) * 1992-10-19 1993-05-12 清华大学 With silicothermic process extraction of metal magnesium from boron mud
CN103572044A (en) * 2013-10-12 2014-02-12 酒泉钢铁(集团)有限责任公司 Method for producing iron hot-pressed carbon-containing pellets through direction reduction on metallized iron powder
CN103667705A (en) * 2013-11-27 2014-03-26 山东理工大学 Comprehensive utilization method for boric sludge waste

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1071967A (en) * 1992-10-19 1993-05-12 清华大学 With silicothermic process extraction of metal magnesium from boron mud
CN103572044A (en) * 2013-10-12 2014-02-12 酒泉钢铁(集团)有限责任公司 Method for producing iron hot-pressed carbon-containing pellets through direction reduction on metallized iron powder
CN103667705A (en) * 2013-11-27 2014-03-26 山东理工大学 Comprehensive utilization method for boric sludge waste

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