CN104014432A - Method for producing high-grade fluorite concentrate through multistage discharge flotation method - Google Patents
Method for producing high-grade fluorite concentrate through multistage discharge flotation method Download PDFInfo
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- CN104014432A CN104014432A CN201410244974.4A CN201410244974A CN104014432A CN 104014432 A CN104014432 A CN 104014432A CN 201410244974 A CN201410244974 A CN 201410244974A CN 104014432 A CN104014432 A CN 104014432A
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Abstract
The invention discloses a method for protruding high-grade fluorite concrete through a multistage discharge flotation method. One flotation machine with four or five grooves is used for conducting rough flotation work, three floatation machines respectively with three grooves are connected in series to conduct continuous fine floatation work of the first fine floatation, the second fine floatation and third fine floatation, a motor of the last groove of each floatation machine is decelerated, an eight-stage motor is used for replacing an original six-stage motor, an air inlet pipe of the last groove is closed, the stirring amount of the last groove is reduced, impurities are settled in the grooves, multistage discharge is achieved, the impurities of tailings are prevented from being sequentially returned, and therefore the fine floatation environment is prevented from being deteriorated. Decontamination and purification are continuously conducted in the fine floatation procedure, high-grade concentrate is obtained, the comprehensive recovery rate of the concentrate is more than 95 percent, and the grade is more than 97 percent. The scavenging procedure in the prior art is omitted in the method, the technology procedures are simple, operation is easy and convenient to conduct, and the method is suitable for be popularized in small and medium size beneficiation enterprises.
Description
Technical field
The present invention relates to a kind of technique of preparing of fluorite ore, more particularly relate to the method for the multistage last person's floatation of a kind of use production high-grade fluorite concentrate from fluorite ore.
Background technology
Fluorite is called again fluorite, and chemical composition is CaF2, sends blueness or purple fluorescent, and therefore gain the name under ultraviolet ray, cathode-ray irradiate or while heating.Fluorite is one of strategic non-metallic ore resource of China, is the leading raw material of fluorine chemical industry.China is located in metallogenic belt, Pacific Rim, fluorite resource is very abundant, account for 35% of world's fluorite reserves, but China's high-grade fluorite ore ratio is little, major part is low-grade mineral intergrowth, grade is 35%～40%, and along with the lasting exploitation of Mineral Resources in China, single rich ore fluorite resource is fewer and feweri, fluorite resource presents the features such as poor, assorted, thin gradually, and chemical industry is very high to the quality requirement of fluorite product simultaneously, and General Requirements CaF2 content is 93%～98%, silicate and carbonate are objectionable impurities, must strict restriction.Nowadays, the quality requirement of China's fluorite concentrate is carried out by the GB5690-85 of the People's Republic of China (PRC) " fluorite concentrate ", and this just has higher requirement to fluorite ore dressing technology.
The dopant species of fluorite ore has silicate, carbonate.For comparatively easily realize separating of fluorite and impurity taking quartz as main silicate fluorite ore, and for the carbonate fluorite ore containing calcite, and various impurity and fluorite ore symbiosis tight, more difficult separation.Want to obtain high-quality chemical grade fluorite concentrate and just need to realize fluorite and separate with the effective of impurity, very high to the requirement of ore grinding, the medicament to flotation and technological requirement are also very high.
At present, the traditional flotation impurity removal process of general employing obtains high-grade fluorite concentrate powder, technological process can be summarized as: ore is after fragmentation, form the large small crushed stone shape of 3cm, rubble enters ball mill and grinds, and the general and grader of ball mill forms closed cycle, and the material after grinding enters grader and carries out classification, qualified breeze enters next technique, and underproof coarse grain returns to ball mill and grinds.Qualified breeze enters mixing drum and floating agent carries out fully, uniform mix, then enter and in flotation device, carry out flotation operation, through roughly selecting for 1 time, 5 times selected, scan for 2 times, mine tailing once enters Tailings Dam.
Adopt traditional processing of fluorspar ores technological process, expect that high-grade fluorite concentrate is more difficult, the concentrate rate of recovery is lower, is difficult to realize fully separating of fluorite mineral and impurity, and beneficiation cost is too high.Selected middle mine tailing order is returned, and as the selected raw material of upper level, because the mine tailing overwhelming majority is the intergrowth of impurity and the tight symbiosis of fluorite, causes selected ecological deterioration, finally affects fluorite concentrate quality.Particularly low-grade fluorite ore deposit, there is substantial connection in its degree of grinding and flotation recovery rate and concentrate grade.According to investigations, domestic most fluorite ore selecting and purchasing enterprise, in the fluorite mine tailing that it goes out of use, all contains 6%～10% CaF2, its main cause is that the smitham after ball mill, grader is still thicker, and flotation is failed to realize fluorite mineral and separated with the effective of impurity.Therefore, finding a kind of simple and easy to do fluorite flotation method is that a line selection ore deposit technical staff thirsts for the problem solving.
As the application number disclosure of the invention that is 201310674937.2 the symbiosis of a kind of many impurity of fine fraction be difficult to resolve from fluorite flotation beneficiation method, in grinding process, Grinding procedure is put slightly, one 200 orders account for 85%.In refining process, the 4th selected chats opened, as the low-grade fluorite concentrate of one (80%～85%), part easily selects fluorite concentrate to enter final fluorite concentrate, obtains part high-grade fluorite concentrate (93%～97%).Though this invention fluorite comprehensive recovery increases, its treatment process is slightly not enough, and Grinding procedure is put slightly, and fluorite concentrate grade is not high, and gained high-grade fluorite concentrate ratio is lower.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art part, the method for the multistage last person's floatation of a kind of use production high-grade fluorite concentrate is provided.
Object of the present invention is achieved by following technical proposals:
The present invention with the technological process of the method for multistage last person's floatation production high-grade fluorite concentrate comprise pretreatment process, roughly select flow process, three steps of cleaning technological flowasheet, specific as follows:
A, pretreatment process: before ore pulp enters and roughly selects, according to CaF2 in raw ore and silicate, carbonate content situation separately, pulp PH value is adjusted to 8～10, optimum water temperature is controlled at 20 DEG C～25 DEG C, throw in stage by stage inhibitor, collecting agent, control the lower dose of inhibitor, collecting agent simultaneously.
B, roughly select flow process: roughly select operation with a flotation device with four or five troughs, and flotation device is further improved, by the motor reduction of speed of last groove of flotation device, replace former 6 grades of motors with 8 grades of motors, the air inlet pipe of last groove is closed simultaneously, reduce the amount of agitation in last groove, impurity is sedimentation in groove, utilize the inhibitory action of inhibitor to impurity in fluorite ore, realize and roughly select the flow process last person.Utilize the effect of collecting agent collecting mineral, reclaim concentrate foam roughly selecting in several leading groove, guarantee that the rate of recovery reaches 100%.
In roughly selecting, by observing groove inner foam situation and checked for impurities, determine pH value and inhibitor, whether collecting agent is thrown in reasonable, as rationally, the CaF2 in ore pulp will all float.As unreasonable, pH value, inhibitor, collecting agent are adjusted.As found, in mine tailing, CaF2 content is high, and reason goes out on mineral powder granular, adjusts ball mill and the closed cycle of grader composition.
Roughly select in the concentrate foam floating, CaF2 content should be more than 90%, and if CaF2 content is lower than 90%, or the carbonate of raw ore is higher than 30%, should increase and throw in inhibitor for the second time.
C, cleaning technological flowasheet: make essence 1, essence 2, smart 3 continuous fines with the series connection of three flotation devices with three troughs and be elected to be industry, by last groove motor reduction of speed of every flotation device, replace former 6 grades of motors with 8 grades of motors, last groove air inlet pipe is closed, reduce the amount of agitation in last groove, impurity is sedimentation in groove, realize continuously respectively essence 1, essence 2, the essence 3 multistage last persons, in tailings, CaF2 content is controlled at below 1%, stops tailings impurity order and returns, and avoids causing selected ecological deterioration.Like this, in cleaning technological flowasheet, constantly removal of impurities is purified, and then obtains high-grade concentrate, guarantees that concentrate comprehensive recovery is more than 95%, and grade is more than 97%.
The invention has the beneficial effects as follows:
1, roughly selecting in flow process, will roughly select the motor reduction of speed of last groove of flotation device, the air inlet pipe of last groove is closed, and impurity is sedimentation in groove, realizes and roughly selects the flow process last person, reclaims concentrate foam roughly selecting in several leading groove, guarantees that the rate of recovery reaches 100%.
2, in cleaning technological flowasheet, realize continuously respectively essence 1, essence 2, the essence 3 multistage last persons, the CaF2 content in tail sand is controlled at below 1%, stop tailings impurity order and return, avoid causing selected ecological deterioration, constantly removal of impurities is purified, guarantee that concentrate comprehensive recovery is more than 95%, grade is more than 97%.
3, fluorite ore, as a kind of nonmetallic ore, has original characteristic, through this technique roughly select, cleaning technological flowasheet operation, farthest reclaimed the CaF2 in ore pulp.Roughly selecting CaF2 content in the flow process last person and the multistage last person's of cleaning technological flowasheet tailings is controlled at below 1%, do not wound up necessity of operation, therefore this technique is cancelled the flow process of scanning of the prior art, reduces procedure links and energy consumption cost, reduce place construction, reduce cost of investment.
4, technological process of the present invention is simple, easy to operation, is applicable to middle-size and small-size Mineral Processing Enterprises and promotes.
Detailed description of the invention
Below in conjunction with production practices, further describe the specific embodiment of the present invention:
Embodiment 1:
Contain CaF2 grade 50% fluorite ore taking somewhere, Guizhou Province as raw material, silicate content 12%, carbonate content 15%, adopts this technological process to produce, and product meets designing requirement, and its technological process thes contents are as follows:
A, in pretreatment process, before ore pulp enters and roughly selects, according to CaF2 in raw ore and silicate, carbonate content situation separately, pulp PH value is adjusted to 8～10, optimum water temperature is controlled at 20 DEG C～25 DEG C, throw in stage by stage inhibitor, collecting agent, control the lower dose of inhibitor, collecting agent simultaneously.
B, roughly selecting in flow process, roughly select operation with a flotation device with four or five troughs, and flotation device is further improved, by the motor reduction of speed of last groove of flotation device, replace former 6 grades of motors with 8 grades of motors, the air inlet pipe of last groove is closed simultaneously, reduce the amount of agitation in last groove, impurity is sedimentation in groove, utilizes the inhibitory action of inhibitor to impurity in fluorite ore, realizes and roughly selects the flow process last person.Utilize the effect of collecting agent collecting mineral, reclaim concentrate foam roughly selecting in several leading groove, guarantee that the rate of recovery reaches 100%.
In roughly selecting, by observing groove inner foam situation and checked for impurities, determine pH value and inhibitor, whether collecting agent is thrown in reasonable, as rationally, the CaF2 in ore pulp will all float.As unreasonable, pH value, inhibitor, collecting agent are adjusted.As found, in mine tailing, CaF2 content is high, and reason goes out on mineral powder granular, adjusts ball mill and the closed cycle of grader composition.
Roughly select in the concentrate foam floating, CaF2 content should, more than 90%, if CaF2 content is lower than 90%, should increases and throw in inhibitor for the second time.
C, in cleaning technological flowasheet, make essence 1, essence 2, smart 3 continuous fines with the series connection of three flotation devices with three troughs and be elected to be industry, by last groove motor reduction of speed of every flotation device, replace former 6 grades of motors with 8 grades of motors, last groove air inlet pipe is closed, reduce the amount of agitation in last groove, impurity is sedimentation in groove, realizes continuously respectively essence 1, essence 2, the essence 3 multistage last persons, and in tailings, CaF2 content is controlled at below 1%, stop tailings impurity order and return, avoid causing selected ecological deterioration.Like this, in cleaning technological flowasheet, constantly removal of impurities is purified, and then obtains high-grade concentrate, guarantees that concentrate comprehensive recovery is more than 95%, and grade is more than 97%.
The flow process of scanning in existing flotation technology is cancelled in this technological process, and after tested, this raw ore concentrate comprehensive recovery is more than 95%, and grade reaches 97%.
Embodiment 2:
Contain CaF2 grade 25% fluorite ore taking somewhere, Guangxi as raw material, its carbonate content 30%, silicate content 22%, it adopts this technological process to produce, and product meets designing requirement, and its technological process thes contents are as follows:
Select with the flotation device of five troughs and make roughing separation equipment, select with the flotation device of three troughs and make picking equipment, floatation equipment improvement and implementation example 1 is same, by the motor reduction of speed of last groove of flotation device, replace former 6 grades of motors with 8 grades of motors, the air inlet pipe of last groove is closed simultaneously.
The CaF2 grade 25% of raw ore, carbonate content 30%, silicate content 22%, roughly selects in flow process and should increase and throw in inhibitor for the second time.All the other ways and embodiment 1 are same.
The flow process of scanning in existing flotation technology is cancelled in this technological process, and after tested, this raw ore concentrate comprehensive recovery is more than 95%, and grade reaches 97.3%.
The above embodiment, is preferred embodiments of the present invention, and unrestricted the scope of the present invention, and the equivalence of doing according to the feature described in the present patent application the scope of the claims and principle therefore all changes or modifies, and all should be included in patent claim of the present invention.
Claims (6)
1. by the method for multistage last person's floatation production high-grade fluorite concentrate, technological process comprises: pretreatment, roughly select, selected, it is characterized in that, step is as follows:
In a, pretreatment process, according to CaF2 in raw ore and silicate, carbonate content situation separately, pulp PH value is adjusted to 8～10, optimum water temperature is controlled at 20 DEG C～25 DEG C, throws in stage by stage inhibitor, collecting agent simultaneously;
B, roughly select in flow process, roughly select operation with a flotation device with four or five troughs, by the motor reduction of speed of last groove of flotation device, replace former 6 grades of motors with 8 grades of motors, the air inlet pipe of last groove is closed simultaneously, reduce the amount of agitation in last groove, impurity is sedimentation in groove, the flow process last person is roughly selected in realization, reclaims concentrate foam roughly selecting in several leading groove;
In c, cleaning technological flowasheet, make essence 1, essence 2, smart 3 continuous fines with the series connection of three flotation devices with three troughs and be elected to be industry, by last groove motor reduction of speed of every flotation device, replace former 6 grades of motors with 8 grades of motors, last groove air inlet pipe of every flotation device is closed, reduce the amount of agitation in last groove, impurity is sedimentation in groove, realize continuously respectively essence 1, essence 2, the essence 3 multistage last persons, in cleaning technological flowasheet, constantly removal of impurities is purified, and then obtains high-grade concentrate.
2. the method for the multistage last person's floatation of use according to claim 1 production high-grade fluorite concentrate, is characterized in that, in roughly selecting, by observing groove inner foam situation and checked for impurities, determines pH value and inhibitor, that collecting agent is thrown in is whether reasonable.
3. the method for the multistage last person's floatation of use according to claim 1 production high-grade fluorite concentrate, it is characterized in that, utilize the effect of inhibitor inhibition of impurities and collecting agent collecting mineral, when the flow process last person is roughly selected in realization, guarantee to roughly select flow process concentrate and all reclaim.
4. the method for the multistage last person's floatation of use according to claim 1 production high-grade fluorite concentrate, is characterized in that, roughly selects in the concentrate foam floating, and CaF2 content should, more than 90%, if CaF2 content is lower than 90%, increases and throw in inhibitor for the second time.
5. the method for the multistage last person's floatation of use according to claim 1 production high-grade fluorite concentrate, is characterized in that, the carbonate of raw ore, higher than 30%, increases and throws in inhibitor for the second time.
6. the method for the multistage last person's floatation of use according to claim 1 production high-grade fluorite concentrate, it is characterized in that, in the multistage last person's tailings, CaF2 content is controlled at below 1%, stopping tailings impurity order returns, avoid causing selected ecological deterioration, guarantee that concentrate comprehensive recovery is more than 95%, grade is more than 97%.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979282A (en) * | 1968-03-11 | 1976-09-07 | English Clays Lovering Pochin & Company Limited | Flotation of fine-grained materials |
| CN102580836A (en) * | 2012-02-29 | 2012-07-18 | 深圳市新星轻合金材料股份有限公司 | Equipment used for crushing fluorite tailings, crushing method and fluorite flotation method |
| CN102921551A (en) * | 2011-12-06 | 2013-02-13 | 龙泉市砩矿有限责任公司 | Fluorite mineral flotation method |
| CN103706485A (en) * | 2013-12-25 | 2014-04-09 | 昆明理工大学 | Beneficiation method of high calcium carbonate content type fluorite ore |
-
2014
- 2014-06-03 CN CN201410244974.4A patent/CN104014432A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979282A (en) * | 1968-03-11 | 1976-09-07 | English Clays Lovering Pochin & Company Limited | Flotation of fine-grained materials |
| CN102921551A (en) * | 2011-12-06 | 2013-02-13 | 龙泉市砩矿有限责任公司 | Fluorite mineral flotation method |
| CN102580836A (en) * | 2012-02-29 | 2012-07-18 | 深圳市新星轻合金材料股份有限公司 | Equipment used for crushing fluorite tailings, crushing method and fluorite flotation method |
| CN103706485A (en) * | 2013-12-25 | 2014-04-09 | 昆明理工大学 | Beneficiation method of high calcium carbonate content type fluorite ore |
Non-Patent Citations (1)
| Title |
|---|
| 胡斌: "《脂肪酸皂捕收剂的合成及其对萤石矿的浮选性能》", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
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