CN107188185A - A kind of utilization quartz sand tailings purifies the production method of high crystobalite sand - Google Patents
A kind of utilization quartz sand tailings purifies the production method of high crystobalite sand Download PDFInfo
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- CN107188185A CN107188185A CN201710548875.9A CN201710548875A CN107188185A CN 107188185 A CN107188185 A CN 107188185A CN 201710548875 A CN201710548875 A CN 201710548875A CN 107188185 A CN107188185 A CN 107188185A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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Abstract
The invention discloses the production method that a kind of utilization quartz sand tailings purifies high crystobalite sand, belong to comprehensive utilization of tailing technical field.This method comprises the following steps：1. wash 2. magnetic separation 3. pickling 4. caustic dip 5. drying 6. screen.By above step, quartz tail sand can be processed into the silica flour product for meeting industrial department requirement, the local quartz tail sand of long-standing problem is solved and stack the problem of environmental pollution for taking a large amount of farmlands and thereby resulting in.
Description
Technical field
The invention belongs to quartz sand production technical field, more particularly to one kind high crystobalite is purified using quartz sand tailings
The production method of sand, silicon powder.
Background technology
With the progress of scientific and technological level, many tips such as optical-fibre communications, semiconductor technology, solar cell, science and techniques of defence
Field is growing to the demand of high quality quartz sand, and China's high grade quartz sand resource increasingly depleted, it is impossible to meet these necks
The demand in domain, improve constantly purification by mineral technology turns into the Main Means for solving the problems, such as glass sand shortage of resources.
In recent years, starting for large quantities of quartzy ore dressing projects is made that product to alleviating active demand of the every profession and trade to siliceous raw material
The contribution of pole, while also bringing rich profit to quartz raw material manufacturing enterprise.But thing followed Quartz Tails problem
Increasingly highlight, the not only development to enterprise brings no small problem, and huge pollution is also brought to surrounding enviroment, is become
The problem of pendulum is in the urgent need to address in face of each quartz raw material manufacturing enterprise.
Shandong Hao Quan silica sands Science and Technology Ltd. produces substantial amounts of tailings while quartz sand is produced, and these tailings are not only
Substantial amounts of place storage is taken, the development to enterprise brings no small problem, huge dirt is also brought to surrounding enviroment
Dye, becomes the problem of pendulum is in the urgent need to address in face of enterprise.Contrast SiO in washed ore, tailings chemical composition2Content is substantially inclined
It is low, while Al2O3、Fe2O3、TiO2It is generally higher Deng impurity component.Tailings quality is not high, and granularity is partially thin, it is necessary to be processed
Purification can be used as high-end applications.
Therefore, enterprise puts into the purification research that a large amount of manpower and materials carry out quartz tail sand, target is to obtain SiO2Content height,
Fe2O3 containAmount is low, meets the high-end high crystobalite sand product utilized of industry, foundation is provided for the high value added utilization of the mine tailing, and
Achieve preferable effect.
The content of the invention
It is an object of the invention to provide a kind of method that utilization quartz sand production waste tailings produces high crystobalite sand.
Quartz tail sand is the thinner crystalloid quartz of granularity, SiO2Content it is general all between 90% to 99%, remaining into
Divide with A12O3Based on, exist in the form of mud.In addition, also a small amount of irony, mica etc..Effectively utilize the difficult point of quartz tail sand
Mainly wherein aluminium, iron content are higher.The present invention is using washing, magnetic separation, pickling, caustic dip, drying, screening technology, from discarded
High crystobalite sand is purified in quartz tail sand, to realize making full use of for resource.
The purpose of the present invention is achieved through the following technical solutions, and this purifies the side of high crystobalite sand using quartz tail sand
Method comprises the following steps：
1. wash：Quartz tail sand discharge advance into hydrocyclone desliming, then washed through clear water, be dehydrated after it is standby.
2. magnetic separation：Quartz tail sand by washing desliming is subjected to preliminary iron removal by magnetic separation in magnetic separator.
3. pickling：The tailings added in rotary drum after washing magnetic separation, at normal temperatures, pickling use water 100%, the
0.6-1 % hydrochloric acid is once added, 45 min is rotated, stops 30 min, turn 45min;Second of addition 0.5-1% sulfuric acid,
Turn 45 min, stop 30 min, turn 45min, stop 30 min;Third time adds 0.3-0.8% nitric acid, and adds 0.4-
0.7% catalyst sodium formate, turns 45 min, stops 30 min, turn 45min, stop 30 min, stops drum and (stops drum to stay overnight overnight
Period, every two hours rotate 5 min), filtering abjection acid solution recycling, with clear water washing material to PH=6-7.
4. caustic dip：In the material after overpickling, sodium hydroxide 1.5-2%, 01.1-0.3% surface-active is first added
Agent, rotates 60 min, stops the min of drum 30, adds 0.5% polysorbas20, rotates 60 min, stops 30 min, caustic dip is total
4~6h of time.Filtering abjection recycle of alkali liquor is utilized, subsequently into the program with clear water washing material, i.e. moisturizing, water 30%,
40 min are rotated, continue moisturizing 40%, 30 min are rotated, continue moisturizing 40%, turn 20 min, continue moisturizing 30%
~40%, 20 min are rotated, then be dehydrated standby.
5. dry：In the material feeding drying machine of step 4. after dehydration, dried at a temperature of 200-450 DEG C,
Cooling.
6. screen：5. step is screened by drying the material of cooling, the sand of the 70-150 mesh filtered out is finished product,
Pack.
It is preferred that, in step 3. pickling procedure, concentration of hydrochloric acid 20%;Liquid-solid ratio:Hydrochloric acid solution:Quartz tail sand is 2:1;
Sulfuric acid concentration 25%;Liquid-solid ratio is:Sulfuric acid:Quartz tail sand is 1.5:1.Hydrochloric acid and sulfuric acid solution in technique can be recycled,
Recycled after wherein impurities accumulation to finite concentration, it is recycled.
It is preferred that, in step 4. caustic dip process, surfactant is sodium naphthenate, the one or two of pull open powder.
Experiment proves that the leaching molten time of sulfuric acid solution has a significant effect to the removal effect of iron tramp in quartz tail sand, needs
Want the enough leaching molten time;But because quartz tail sand particle is thinner, the time is oversize to be possible to deposited phenomenon after producing, and makes going for iron
Except effect declines on the contrary, therefore in pickling and caustic dip step, rotation-stopping -- the work that moves in circles of rotation-stopping is selected
Skill, while promoting the various auxiliary agents of physical-chemical reaction, such as surfactant, catalyst sodium formate, Ke Yixian by adding
The raising acidleach of work and alkali leaching effect,
Proved by strict detection, the technical indicator of the high crystobalite sand produced according to the method described in the present invention is substantially better than
The high crystobalite sand of the method production of prior art, technical indicator contrast see the table below.
Product category whiteness（%） Si O2（%） Fe2O3（%）
High crystobalite sand 92.0 99.9 0.008 produced by the invention
The high crystobalite sand 88.3 99.5 0.0 2 of prior art production
It can be drawn, be produced with the high crystobalite sand of method of the present invention production and using prior art by upper table data
High crystobalite sand facies ratio, whiteness is significantly increased, Fe2O3Content is significantly reduced, SiO2Increase, reaches 99.9%.Using mechanical force,
The fuel factor of the generations such as mechanical friction, impact, the change on the fresh surface of mineral crystal structure, mineral active and chemical composition with
And the electrochemical reaction supervened, the more difficult mineral chemically reacted can be enable comparatively easy to carry out, while may be used also
So that sour molten, reduction chemical reaction the speed and depth of quartz tail sand is greatly improved, make the leaching rate of the impurity such as institute's iron content at double
Improve, the SiO of mineral2Content is significantly improved.
Simultaneously, it is necessary to which it is emphasized that the step such as pickling, caustic dip in method of the present invention is entirely in normal temperature
Lower progress, it is not necessary to artificial heating, and the step such as the pickling of prior art, caustic dip is required for temperature being increased to 100 degree of left sides
It is right.Therefore method of the present invention compared with prior art, not only increases product quality, also simplify process, reduce
Energy consumption.
By the exploitation to quartz tail sand comprehensive utilization technique, quartz tail sand can be processed into and meet industrial department requirement
Silica flour product, the environmental pollution for solving the local quartz tail sand a large amount of farmlands of stacking occupancy of long-standing problem and thereby resulting in is asked
Topic.
Embodiment
The method for purifying high crystobalite sand using quartz tail sand comprises the following steps：
1. wash：Quartz tail sand discharge advance into hydrocyclone desliming, then washed through clear water, be dehydrated after it is standby.
2. magnetic separation：Quartz tail sand by washing desliming is subjected to preliminary iron removal by magnetic separation in magnetic separator.
3. pickling：The tailings added in rotary drum after washing magnetic separation, at normal temperatures, pickling use water 100%, the
Once the % hydrochloric acid of addition 0.8, rotates 45 min, stops 30 min, turn 45min;Second of 0.7% sulfuric acid of addition, turns
45 min, stop 30 min, turn 45min, stop 30 min;Third time adds 0.5% nitric acid, and adds 0.6% catalyst
Sodium formate, turns 45 min, stops 30 min, turn 45min, stop 30 min, and stopping drum, (during stopping drum overnight, every two is small overnight
When rotate 5 min), filtering abjection acid solution recycling, with clear water washing material to PH=6-7.
4. caustic dip：In the material after overpickling, sodium hydroxide 1% is first added, 0.2% surfactant turns
Dynamic 60 min, stop the min of drum 30, add 0.5% polysorbas20, rotate 60 min, stop 30 min, caustic dip total time 4
~6h.Filtering abjection recycle of alkali liquor is utilized, and subsequently into the program with clear water washing material, i.e. moisturizing, water 30% is rotated
40 min, continue moisturizing 40%, rotate 30 min, continue moisturizing 40%, turn 20 min, and continuation moisturizing 30%~
40%, 20 min are rotated, then be dehydrated standby.
5. dry：In material feeding drying machine of the step 4 after dehydration, dried at a temperature of 200-450 DEG C,
Cooling.
6. screen：Step 5 is screened by drying the material of cooling, the sand of the 60-140 mesh filtered out is finished product,
Pack.
Claims (5)
1. a kind of utilization quartz sand tailings purifies the production method of high crystobalite sand, it is characterised in that this method includes following step
Suddenly：1. 6. the caustic dip -5. drying-of the pickling of magnetic separation -3. of washing -2. -4. screens.
2. a kind of utilization quartz sand tailings according to claim 1 purifies the production method of high crystobalite sand, its feature exists
In 3. pickling：The tailings added in rotary drum after washing magnetic separation, at normal temperatures, pickling use water 100%, add for the first time
Enter 0.6-1 % hydrochloric acid, rotate 45 min, stop 30 min, turn 45min;Second of addition 0.5-1% sulfuric acid, turns 45
Min, stops 30 min, turns 45min, stops 30 min;Third time adds 0.3-0.8% nitric acid, and adds urging for 0.4-0.7%
Agent sodium formate, turns 45 min, stops 30 min, turn 45min, stop 30 min, stops drum and stays overnight (during stopping drum overnight, often
Rotate 5 min within two hours), filtering abjection acid solution recycling, with clear water washing material to PH=6-7.
3. a kind of utilization quartz sand tailings according to claim 1 purifies the production method of high crystobalite sand, its feature exists
In 4. caustic dip：In the material after overpickling, sodium hydroxide 1.5-2%, 01.1-0.3% surfactant is first added,
60 min are rotated, stop the min of drum 30,0.5% polysorbas20 is added, 60 min is rotated, stops 30 min, caustic dip total time
4~6h；Filtering abjection recycle of alkali liquor is utilized, and subsequently into the program with clear water washing material, i.e. moisturizing, water 30% is rotated
40 min, continue moisturizing 40%, rotate 30 min, continue moisturizing 40%, turn 20 min, and continuation moisturizing 30%~
40%, 20 min are rotated, then be dehydrated standby.
4. a kind of utilization quartz sand tailings according to claim 1 or 2 purifies the production method of high crystobalite sand, its feature
It is, in step 3. pickling procedure, concentration of hydrochloric acid 20%;Liquid-solid ratio:Hydrochloric acid solution:Quartz tail sand is 2:1;Sulfuric acid concentration
25%;Liquid-solid ratio is:Sulfuric acid:Quartz tail sand is 1.5:1；Hydrochloric acid and sulfuric acid solution in technique can be recycled, when wherein miscellaneous
Matter builds up to after finite concentration and recycled, recycled.
5. a kind of utilization quartz sand tailings according to claim 1 or 3 purifies the production method of high crystobalite sand, its feature
It is, in step 4. caustic dip process, surfactant is sodium naphthenate, the one or two of pull open powder.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107501778A (en) * | 2017-10-18 | 2017-12-22 | 温州市赢创新材料技术有限公司 | A kind of low-cost energy-saving construction material and preparation method thereof |
| CN108640664A (en) * | 2018-03-22 | 2018-10-12 | 滁州方大矿业发展有限公司 | A kind of silica flour for ceramic making |
| CN111499365A (en) * | 2020-04-22 | 2020-08-07 | 宜宾学院 | Method for whitening weathered sandstone through acid-base combined treatment |
| CN115246647A (en) * | 2022-07-28 | 2022-10-28 | 苏州清控环保科技有限公司 | Quartz sand iron remover and treatment method thereof |
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| CN103372496A (en) * | 2013-06-21 | 2013-10-30 | 田辉明 | Process method for separating quartz sand, arkosic sand and iron powder from river yellow sand |
| CN103613102A (en) * | 2013-12-04 | 2014-03-05 | 南京工业大学东海先进硅基材料研究院 | Process for preparing ultrahigh pure quartz sand through silica raw material |
| CN103880278A (en) * | 2014-02-25 | 2014-06-25 | 连云港市弘扬石英制品有限公司 | Preparation method of optical fiber covering quartz capillary perform and continuous melting furnace equipment |
| CN103964444A (en) * | 2014-05-05 | 2014-08-06 | 临沂晟泉矿业有限公司 | Method for producing high-purity quartz sand |
| CN103979546A (en) * | 2014-05-05 | 2014-08-13 | 临沂晟泉矿业有限公司 | Method for producing purified high-whiteness quartz sand and silica micropowder from quartz sand tailings |
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Patent Citations (5)
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| CN103372496A (en) * | 2013-06-21 | 2013-10-30 | 田辉明 | Process method for separating quartz sand, arkosic sand and iron powder from river yellow sand |
| CN103613102A (en) * | 2013-12-04 | 2014-03-05 | 南京工业大学东海先进硅基材料研究院 | Process for preparing ultrahigh pure quartz sand through silica raw material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501778A (en) * | 2017-10-18 | 2017-12-22 | 温州市赢创新材料技术有限公司 | A kind of low-cost energy-saving construction material and preparation method thereof |
| CN108640664A (en) * | 2018-03-22 | 2018-10-12 | 滁州方大矿业发展有限公司 | A kind of silica flour for ceramic making |
| CN111499365A (en) * | 2020-04-22 | 2020-08-07 | 宜宾学院 | Method for whitening weathered sandstone through acid-base combined treatment |
| CN111499365B (en) * | 2020-04-22 | 2022-05-20 | 宜宾学院 | Method for whitening weathered sandstone through acid-base combined treatment |
| CN115246647A (en) * | 2022-07-28 | 2022-10-28 | 苏州清控环保科技有限公司 | Quartz sand iron remover and treatment method thereof |
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