CN102285672A - Method for developing and utilizing old brine resource of salt lake - Google Patents
Method for developing and utilizing old brine resource of salt lake Download PDFInfo
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- CN102285672A CN102285672A CN2011100902933A CN201110090293A CN102285672A CN 102285672 A CN102285672 A CN 102285672A CN 2011100902933 A CN2011100902933 A CN 2011100902933A CN 201110090293 A CN201110090293 A CN 201110090293A CN 102285672 A CN102285672 A CN 102285672A
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- makeup water
- salt lake
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- depression
- cone
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Abstract
The invention discloses a method for developing and utilizing old brine resources of a salt lake. The method comprises the following steps of: step 1) mixing old brine and fresh water into makeup water according to weight ratio of (3-5):1; and step 2) recharging the makeup water under the ground from the edge area of the depression cone of the salt lake. By adopting the method disclosed by the invention, only a small amount of fresh water is required to be mixed with the old brine to form the makeup water with proper concentration. The makeup water is recharged under the ground from the edge area of the depression cone, can flow towards the center of the depression cone and can dissolve solid kali salts in a formation through which the makeup water flows when the makeup water flows. Therefore, not only can the content of potassium ions in the makeup water be easily and continuously increased, but also the makeup water can be fully mixed with the original brine in the center of the depression cone, pores in the formation are easily expanded, the content of high-quality raw brine in the formation is greatly improved, the mining difficulty can be reduced, the old brine resources are fully developed and utilized, the emission of the old brine is avoided or reduced and the goal of changing waste into valuable is actually realized.
Description
Technical field the present invention relates to salt mine development and use field, relates in particular to the method for the old halogen resources development and utilization in salt lake.
The old halogen of background technology also claims tail halogen, is meant the bittern after magnesium-containing brine concentrates naturally or manually, and the content of this bittern KCl and NaCl is very low, contains certain MgSO
4, be MgCl
26H
2O begins saturated bittern of separating out.In the process that sylvite is produced, old halogen is generally the part of finally being left that is difficult to utilize again, present most enterprises with it as waste disposal.
The processing of old halogen is the difficult problem of puzzlement salt mine enterprise always, usually it being carried out compartmentalized storage handles, but when old halogen can not compartmentalized storage, just may bleed back in the former halogen in the stratum, cause the Repone K in the liquid to be separated out, form solid Repone K, thereby the KCE content in the former halogen is reduced, even lose the exploitation utility value.
With Cha Er sweat salt lake is example, and the old halogen in Cha Er sweat salt lake directly was discharged into the United Lake and stores before 2003.According to statistics, the old halogen annual emissions in first exploiting field, whole Cha Er sweat salt lake in 2003 has just reached 4740 ten thousand steres, because the discharging of accumulation for many years, make United Lake water surface area by original 10 square kilometres, expand 120 square kilometres to rapidly, cause to the north of the United Lake 2 kilometers～4 kilometers, the liquid Repone K mineral deposit that area is 40 square kilometres is contaminated.After 2003, row's halogen amount sharply increases, and the United Lake is difficult to hold more old bittern again.Therefore, old halogen has been discharged into the Nan Huobuxun lake again, has caused the old halogen in Nan Huobuxun lake to reflux to flood the Kunlun, Qinghai mining industry company limited to hide about 60 square kilometres of lattice potash fertilizer plant mining area, and about 10 square kilometres of the maximum width that westwards refluxes extends 8 kilometers consequence northwards.The Nan Huobuxun lake originally is a natural lake, not only deposits a large amount of old bittern at present, also will save the river of supply, if run into the high flow year, flood adds old bittern will produce bigger backflow.If untimelyly carry out improvement, whole mining area will become a vast expanse of water to the east of the railway of Cha Er sweat salt lake, and the bittern potassium resource will be destroyed, and Lu Dongshi many enterprises will stop production, and near vegetation will not protect yet.
The problem of bringing at old halogen, mainly take at present to prevent to store the way improvement that old bittern recharges to underground infiltration, but the manpower and materials that this improvement method expends are huge, and along with production-scale expansion, the semi-invariant of old bittern will constantly increase, and the effect of storing old bittern must be limited.How research reduces the discharging of old halogen, even turns waste into wealth and be only the long-term plan of keeping the salt lake Sustainable development.
" energy-saving and emission-reduction and material innovation " 2007 the 2nd interim " tail halogen dilution in Cha Er sweat salt lake are recharged dissolved solids sylvite and improved salt lake resources comprehensive exploitation recovery utilization rate " disclose a kind of tail halogen that utilizes and have converted the method for recharging underground dnapl solid sylvite behind the fresh water, and this method can utilize tail halogen to improve the comprehensive exploitation recovery utilization rate of salt ore resources fully.But in the literary composition, the ratio of mixture of tail halogen and fresh water was near 1: 1, and the zone of recharging is not particularly limited, this will cause the density of recharging bittern little, and formation crude bittern density is big, recharges bittern and can float over former bittern top, does not have the effect of dissolved solids sylvite.
Summary of the invention the purpose of this invention is to provide and a kind ofly recharges underground dnapl solid sylvite after utilizing old halogen and fresh water to be mixed in proportion, thereby improves the method for salt lake old halogen resources development and utilization rate.
For achieving the above object, the method for the old halogen resources development and utilization in salt lake of the present invention comprises the steps step 1: old halogen is mixed forming supplementary feed by weight 3～5: 1 with fresh water; Step 2: recharge underground from the cone of depression marginarium in salt lake supplementary feed.
Old halogen mixes by weight 4: 1 with fresh water in the step 1 of the present invention.Adopt the composite supplementary feed of above weight ratio recharge underground after, can make the follow-up former halogen of taking out near the high-quality bittern of carnallitite drop out point.
Prerequisite of the present invention is to have formed cone of depression in the salt lake, and supplementary feed recharges the marginarium that the zone should be a cone of depression.
Adopt method of the present invention, only need a spot of fresh water to mix and just can form the suitable supplementary feed of concentration with old halogen, supplementary feed recharges underground from the marginarium of cone of depression, flow in its central section to cone of depression, supplementary feed one tunnel send the solid sylvite that dissolves in its stratum of flowing through on one side, like this, both made easily that potassium content constantly increases in the supplementary feed, thereby can with original bittern thorough mixing of cone of depression central section, easily make the pore bulge in the stratum again, greatly improved the content of the former halogen of high-quality in the stratum, reduced the difficulty of exploitation, thereby fully developed old halogen resource, avoided or reduced the discharging of old halogen, really realized turning waste into wealth.
Below the embodiment part technical term among the present invention is further explained:
Term among the present invention " former halogen " refers to from the bittern of the saltiness of descending the hole naturally or gather in the salt lake 〉=25%, owing to be not referred to as former halogen through any artificial processing event, there is certain difference in the former halogen composition in various places.
Term among the present invention " old halogen " refers to and also claims tail halogen, is meant the bittern after magnesium-containing brine concentrates naturally or manually, and the content of this bittern KCl and NaCl is very low, contains certain MgSO
4, be MgCl
26H
2O begins saturated bittern of separating out.For example 25 ℃, K
+Na
+Mg
2+/ SO
4 2-Cl
-+ H
2Old halogen point composition is KCl 0.1%, NaCl 0.25%, MgCl in the O system
230.47%, MgSO
44.07%.The concentration of each salt ion and temperature, normal atmosphere, exploitation place and production practice all have relation in the old halogen, and therefore may there be difference in the composition of old halogen in different systems, but these difference do not influence the enforcement of the inventive method.
" cone of depression " of the present invention refers to the salt lake because long-term exploitation causes the groundwater level sedimentation in the exploitation compact district, and the center falls heavy big, and the marginarium progressively carries out the transition on the initial condition bit line, and the dark periphery in center shoals gradually, the likeness in form funnel.Described " marginarium of cone of depression " is a confirmable zone, and it can be the annular region of close initial condition bit line in the cone of depression; Also can be the cone of depression extension,, will guarantee that in a word supplementary feed can flow from the edge to the central section along cone of depression near the part of cone of depression gradation zone.
Term among the present invention " formation porosity " is explained as follows: there is hole in formation crude when beginning saline crystallization, but because salt lake formation time long (1,000 ten thousand-1,700,000 years), the stratum natural static(al) makes hole diminish, there is the part hole not to be communicated with, porosity is the percentage that contains the volume of liquid in the natural stratum, the difficulty that also reflects bittern exploitation, porosity take the bittern will be easy greatly, and recovery ratio also can increase.
The method of the old halogen resources development and utilization in salt lake of the present invention comprises the steps step 1: old halogen is mixed forming supplementary feed by weight 3～5: 1 with fresh water; Step 2: recharge underground from the cone of depression marginarium in salt lake supplementary feed.
Old halogen mixes by weight 4: 1 with fresh water in the step 1 of the present invention.Adopt the composite supplementary feed of above weight ratio recharge underground after, can make the follow-up former halogen of taking out near the high-quality bittern of carnallitite drop out point.
Prerequisite of the present invention is to have formed cone of depression in the salt lake, and supplementary feed recharges the marginarium that the zone should be a cone of depression.
Further specify below in conjunction with specific embodiment:
Embodiment 1: old halogen was mixed forming supplementary feed by weight 3: 1 with fresh water; Recharge underground from the cone of depression marginarium in salt lake supplementary feed.
Embodiment 2: old halogen was mixed forming supplementary feed by weight 4: 1 with fresh water; Recharge underground from the cone of depression marginarium in salt lake supplementary feed.
Embodiment 3: old halogen was mixed forming supplementary feed by weight 5: 1 with fresh water; Recharge underground from the cone of depression marginarium in salt lake supplementary feed.
Supplementary feed recharges underground from the marginarium of cone of depression, flow in its central section to cone of depression, supplementary feed one tunnel send the solid sylvite that dissolves in its stratum of flowing through on one side, like this, on the one hand, potassium content constantly increases in the supplementary feed, thus can with original bittern thorough mixing of cone of depression central section, make former halogen that follow-up exploitation comes out very near the carnallitite drop out point, improved former alkali amount.On the other hand, the recharging of supplementary feed makes and the pore bulge in the stratum greatly improved the content of the former halogen of high-quality in the stratum, reduced the difficulty of exploitation, thereby fully developed old halogen resource, avoided or reduced the discharging of old halogen, really realized turning waste into wealth.
The suitable especially sulfate type salt lake that is applied to of recovery method of the present invention, for example Qazz is according to ore field, horse sea ore field, billow beach ore field, Lop Nur ore field or the like.
Need to prove; the area in salt lake is generally very big; and bittern is a kind of mixed system of complexity; qualification to the mass percentage concentration of each salt ion in the bittern among the present invention is a value range; it may change to some extent with the difference in temperature, air pressure or exploitation place, promptly falls into protection scope of the present invention as long as still utilize old halogen and mixing of fresh water and recharge subterranean step by the cone of depression marginarium.
Claims (2)
1. the method for the old halogen resources development and utilization in salt lake is characterized in that: it comprises the steps,
Step 1: old halogen is mixed the formation supplementary feed with fresh water by weight 3～5: 1;
Step 2: recharge underground from the cone of depression marginarium in salt lake supplementary feed.
2. the method for the old halogen resources development and utilization in salt lake according to claim 1 is characterized in that: old halogen mixes by weight 4: 1 with fresh water in the described step 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011100902933A CN102285672A (en) | 2011-04-08 | 2011-04-08 | Method for developing and utilizing old brine resource of salt lake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100902933A CN102285672A (en) | 2011-04-08 | 2011-04-08 | Method for developing and utilizing old brine resource of salt lake |
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| CN102285672A true CN102285672A (en) | 2011-12-21 |
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|---|---|---|---|
| CN2011100902933A Pending CN102285672A (en) | 2011-04-08 | 2011-04-08 | Method for developing and utilizing old brine resource of salt lake |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583449A (en) * | 2012-02-23 | 2012-07-18 | 格尔木藏格钾肥有限公司 | Low-grade solid potassium chloride ore solid-to-liquid method |
| CN107152280A (en) * | 2017-07-07 | 2017-09-12 | 青海中航资源有限公司 | A kind of recovery method of low-grade solid kalium mine |
| CN115288657A (en) * | 2022-07-11 | 2022-11-04 | 中国科学院青海盐湖研究所 | Dissolving mining method for improving solid sylvite conversion rate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030080066A1 (en) * | 2001-10-29 | 2003-05-01 | Vohra Rajinder N. | Recovery of common salt and marine chemicals from brine |
| CN101402462A (en) * | 2008-09-21 | 2009-04-08 | 青海盐湖工业集团股份有限公司 | Immersion type dissolution conversion method for solid kalium mine |
-
2011
- 2011-04-08 CN CN2011100902933A patent/CN102285672A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030080066A1 (en) * | 2001-10-29 | 2003-05-01 | Vohra Rajinder N. | Recovery of common salt and marine chemicals from brine |
| CN101402462A (en) * | 2008-09-21 | 2009-04-08 | 青海盐湖工业集团股份有限公司 | Immersion type dissolution conversion method for solid kalium mine |
Non-Patent Citations (1)
| Title |
|---|
| 禹文龙等: "《额吉淖尔盐湖补水溶盐制卤工艺的研究与利用》", 《内蒙古农业大学学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583449A (en) * | 2012-02-23 | 2012-07-18 | 格尔木藏格钾肥有限公司 | Low-grade solid potassium chloride ore solid-to-liquid method |
| CN107152280A (en) * | 2017-07-07 | 2017-09-12 | 青海中航资源有限公司 | A kind of recovery method of low-grade solid kalium mine |
| CN107152280B (en) * | 2017-07-07 | 2019-07-12 | 青海中航资源有限公司 | A kind of recovery method of low-grade solid kalium mine |
| CN115288657A (en) * | 2022-07-11 | 2022-11-04 | 中国科学院青海盐湖研究所 | Dissolving mining method for improving solid sylvite conversion rate |
| CN115288657B (en) * | 2022-07-11 | 2024-02-20 | 中国科学院青海盐湖研究所 | Solution mining method for improving solid potassium salt conversion rate |
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Application publication date: 20111221 |