CN1283526A - Process for preparing granular yellow chemical - Google Patents
Process for preparing granular yellow chemical Download PDFInfo
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- CN1283526A CN1283526A CN 00113059 CN00113059A CN1283526A CN 1283526 A CN1283526 A CN 1283526A CN 00113059 CN00113059 CN 00113059 CN 00113059 A CN00113059 A CN 00113059A CN 1283526 A CN1283526 A CN 1283526A
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- xanthate
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Abstract
A process for preparing granular yellow explosive includes mixing the powdered yellow explosive, adhesive, filler and diluent in ratio of 1:(0.01-0.02):(0.005-0.015):(0.1-0.15), stirring to obtain particles and vacuum drying. Its advantages include high safety of transportation, high utilization rate and no dust pollution.
Description
The present invention relates to the preparation method of a kind of floating agent-xanthate of non-ferrous metal, mainly is the method for preparing granular dry xanthate with the powdery xanthate.
Xanthate is the main floating agent of nonferrous metal mine, and employed in producing at present all is the powdery xanthate, and in use dust pollution is big for this xanthate that is powdery, and it is more to spill waste, transports dangerous.Continuous progress along with society and production, manufacturer has proposed more and more higher requirement to the feature of environmental protection of xanthate and the security and the collecting effect in the floatation process of long-distance transport both at home and abroad, simultaneously, xanthate manufacturing enterprise was for solving the dust pollution in the production and operation process, the problem that cost rises, benefit descends in recent years, dropped into a large amount of energy and studied the method for how the powdery xanthate being made granular yellow chemical and don't influencing xanthate collecting effect, all do not achieved success.
Purpose of the present invention provides a kind of do not have dust pollution, little, the transportation safety of waste, the effective granular yellow chemical of collecting just in order to overcome above-mentioned the deficiencies in the prior art part.
The objective of the invention is to be achieved through the following technical solutions.It is that the powdery xanthate is prepared into granular yellow chemical as follows: (a) the powdery xanthate that takes by weighing is added in the blender; (b) solvent that water and adhesive are mixed with adds in the blender and with the xanthate that adds earlier and stirs; (c) again filler is added in the blender to stir and form the xanthate mixture with above-mentioned substance; (d) the above-mentioned xanthate mixture that stirs is made granular yellow chemical; (e) weight ratio of each component is xanthate in the xanthate mixture: adhesive: filler: diluent=1: 0.01～0.02: 0.005～0.015: 0.100～0.150; (f) granular yellow chemical of humidity is put into the vacuum dryer drying,
Among this preparation method, used diluent is a water, and adhesive is a waterglass, and the modulus of waterglass is 3.3-4, and solvent strength is 37-40 ° of Be, and filler is solid powdery Na
2Co
3,
The vacuum of this preparation method when drying is not less than 550 * 133.322Pa; Drying pressure in the dry run rises to 0.25Mpa with the prolongation of drying time from normal pressure, and temperature rises to 105 ℃ from normal temperature.
The special physical property decision xanthate of synthetic xanthate is granulated and can not be only depended on simple mechanical presses, must select suitable bonding to improve the mutual cementitiousness of powdery xanthate; After selecting suitable filler to guarantee to granulate the particle xanthate not yielding, broken, easily dry; Select suitable solvent that adhesive and synthetic xanthate are mixed easily, reduce binder dosage simultaneously, improve the adhesive property of adhesive.And selected adhesive, filler and solvent must satisfy three conditions: the physical property and the chemical property that 1. can not influence xanthate; 2. can not influence the flotation effect of xanthate to mineral matter; 3. must possess economy, reasonability, with low cost, proportional quantity can not be too big, can not influence the normal quality index of drying granular xanthate.
Because in the floatation process of xanthate as collecting agent, also use waterglass and soda ash as auxiliary agent simultaneously, water glass solution is after drying out gradually, viscosity enlarges markedly, and then causes sclerosis later on, therefore can be used as binding agent; Make filler with powdery soda ash, make the production environment pH value of xanthate show neutrality or alkalescent, in this environment, the xanthate stable performance is difficult for decomposing, and is easy to drying; Water can reduce the consumption of waterglass as solvent (diluent), and to guarantee the rate of drying and the product quality of granular yellow chemical, the less main product potential energy of dry product particle that guarantees of the addition of adhesive and filler reaches the standard of product quality.Adopt vacuum dryer can prevent effectively the decomposition of xanthate chemical composition and particle distortion, break; Grasp appropriate drying pressure and temperature, drying efficiency is improved greatly.
To be further explained the present invention by drawings and Examples below.
Fig. 1 is the technological process of production figure of granular yellow chemical,
Fig. 2 is the process chart of drying stage among Fig. 1.
With the sodium ethyl xanthate is example, and according to technological process shown in Figure 1, the powdery composite sodium ethyl xanthate that claims 300Kg to meet quality standard adds in the mixer, and the main chemical compositions of the synthetic sodium ethyl xanthate of powdery sees Table one:
Table one: synthetic sodium ethyl xanthate main chemical compositions
| Grade | The ethoxy-dithioformic acid sodium content is not less than % | Free alkali is not more than % | Water % |
| One-level | ?????82.0 | ?????0.5 | ????≤11.0 |
| Secondary | ?????79.0 | ?????0.5 | ????≤11.0 |
Take by weighing 4.5Kg40 ° of Be waterglass in proportion respectively, 3.0Kg powdery soda ash and 37.5Kg water; At first 37.5Kg water is joined in the 4.5Kg40 ° of Be waterglass and dilute, slowly add then in the mixer, the limit edged stirs, wait to add stir after, add 3.0Kg powdery soda ash again, and stir; Qualified compound is by the mixer discharging; add the excellent granular particle that is squeezed into φ 4 * 6 in the granulator equably; and the particle material sieved; the granular material that sieves out returns in the granulator; the smooth surface of sieving out, neat particle add in the drying machine, and the chemical composition of composite ethyl sodium particle xanthate sees Table two
Table two: the main component of synthetic ethyl sodium particle xanthate
| Title | Sodium ethylxanthate | Free alkali | ??SiO 2 | ??Na 2CO 3 | ??????H 2O |
| Composition % | ???68.7～71.3 | ??≤0.44 | ????0.37 | ????0.87 | ???19.50～21.25 |
Adopt SZ1500/C vacuum combination drying machine to come the drying granular xanthate, granular yellow chemical is operated by drying process as shown in Figure 2 in drying machine.The main purpose of granular yellow chemical drying is moisture and other volatile matter of removing in the xanthate, to guarantee the stability and the security of xanthate chemical property.The characteristic of granular yellow chemical requires us in dry run, the vacuum desiccator that must adopt static vacuum desiccator or slowly rotate.(vacuum is not less than 550 * 133.32Pa), low-temperature condition, with the distortion of the decomposition that prevents the xanthate chemical composition and particle, break must to keep condition of high vacuum degree when dry.The drying efficiency height, key is the control of baking temperature, and the drying medium that we use is a low-pressure steam, and baking temperature is controlled with steam pressure, and the control step is as follows: (1), drying machine are opened, and begin to heat up; In 1 and a half hours, whole pressure is controlled between the 0.01-0.02MPa, and dry built-in temperature is controlled between 45-55 ℃, is convenient to the particle internal moisture and slowly migrates to the surface, takes away by vacuum system.(2), heated up 1 and a half hours after, can be transferred to steam pressure between the 0.03-0.06MPa, dry built-in temperature is controlled between 65-75 ℃, the large quantity of moisture of particle surface becomes steam and takes away by vacuum system in this stage.This stage kept 2 hours.(3), heated up 3 and a half hours after, steam pressure is transferred to 0.1MPa, improve temperature of charge once more, keep dry built-in temperature between 80-95 ℃.The effect in this stage is that the accelerated particle internal moisture is to the speed of surface migration and the speed of particle surface water evaporates.This stage kept 1 hour.(4), heated up 4 and a half hours after, steam pressure is transferred to 0.15-0.25MPa, this moment, dry built-in temperature was above 95 ℃, temperature is between 95-105 ℃, continues 50 minutes by 1 hour, gets final product sample examination, the qualified back of product is reduced to normal temperature to the dryer inner temperature, discharging again, packing.Be 320-330 minute total drying time of one groove material.
In the following table three, provided typical temperature controlled processes in the production dry run.
Table three: the dry control procedure (vacuum: 570mmHg) of granular yellow chemical
| Sequence number | ??1 | ??2 | ??3 | ??4 | ??5 | ??6 | ??7 | ??8 | ??9 | ??10 | ??11 | ??12 | ??13 |
| Time (time) | Initial | ?0.3 | ?0.5 | ?1.0 | ?1.5 | ?2.0 | ?2.5 | ?3.0 | ?3.5 | ?4.0 | ?4.5 | ?5.0 | ?5.2 |
| Temperature (℃) | ?28.9 | ?35.0 | ?45.0 | ?53.0 | ?58.0 | ?65.0 | ?68.0 | ?73.0 | ?75.0 | ?79.0 | ?92.0 | ?97.0 | ?102 |
| Steam pressure (Mpa) | ?0.01 | ?0.02 | ?0.02 | ?0.02 | ?0.02 | ?0.04 | ?0.05 | ?0.06 | ?0.06 | ?0.09 | ?0.10 | ?0.15 | ?0.20 |
Can draw from production practices: steam pressure is bigger to the temperature controlling influence, the product casting yield of dry run is 84-86%, obtain higher casting yield, key is to heat up to want steadily, this is up to 20% because of the moisture of synthesizing granular yellow chemical, some dry temperature heat up too fast, too high, can cause the quick vaporized expanding of particle internal moisture, when the speed of expansion of particle internal moisture arrives the speed of particle surface greater than water translocation, explosion, efflorescence or caking will take place in particle, have just reduced the casting yield and the mass particle of particle xanthate naturally.If adopt micro-wave vacuum equipment to come the drying granular xanthate, its production efficiency also will improve more than 10 times.After testing, the chemical composition of dry product ethyl sodium particle xanthate sees Table four
Table four: the main component of dry product ethyl sodium particle xanthate
By table four as can be known, the chemical property of granular yellow chemical is identical with the dry xanthate of ore dressing characteristic and powdery, not because of granulation changes, can be up to state standards.The particulate component of granular yellow chemical is even, and shape is neat, smooth surface, quality are hard.Color is light yellow, and penetrating odor is low than the powdery xanthate.Formal parameter is: diameter phi 4mm, long 5～8mm; Intensive parameter: from 1.5 meters eminences of hard ground, free-falling is not broken for 25～30 times.Solubility property in water is also fine, and natural at normal temperatures and pressures dissolution time is 20～22 seconds; Having under the condition of stirring, dissolution time is 14～15 seconds, can satisfy the requirement of production fully.
| Title | Sodium ethylxanthate | Free alkali | ?????H 2O | ????SiO 2 | ????Na 2CO 3 |
| Content % | ??91.5～95.6 | ???0.11～0.02 | ???0.29～4.0 | ???0.48～0.52 | ??1.14～1.23 |
Granular yellow chemical of the present invention has improved the utilization rate of xanthate, has avoided xanthate dust pollution in use, can also reclaim the xanthate that spills on ground effectively, and has guaranteed the security of long-distance transport.In outlet was sold, granular dry xanthate per ton exceeded about 50 dollars than the price of the dry xanthate of powdery, thereby has also adapted to the demand of international market, has improved capacity of competition, has increased the economic benefit of medicament manufacturing enterprise.
Claims (6)
1, the preparation method of granular yellow chemical comprises the steps: that (a) adds the powdery xanthate that takes by weighing in the blender; (b) solvent that water and adhesive are mixed with adds in the blender and with the xanthate that adds earlier and stirs; (c) again filler is added in the blender to stir and form the xanthate mixture with above-mentioned substance; (d) the above-mentioned xanthate mixture that stirs is made granular yellow chemical; (e) weight ratio of each component is xanthate in the xanthate mixture: adhesive: filler: diluent=1: 0.01～0.02: 0.005～0.015: 0.100～0.150; (f) granular yellow chemical of humidity is put into the vacuum dryer drying.
2, preparation method according to claim 1 is characterized in that, described adhesive is a waterglass.
3, preparation method according to claim 1 and 2 is characterized in that, the modulus M=3.3-4.0 of waterglass, and solvent strength is 37-40 ° of Be.
4, preparation method according to claim 1 is characterized in that, described filler is solid powdery Na
2Co
3
5, preparation method according to claim 1 is characterized in that, the vacuum when dry is not less than 550 * 133.322Pa.
6, preparation method according to claim 1 is characterized in that, the drying pressure of dry run rises to 0.25Mpa with the prolongation of drying time from normal pressure, and temperature rises to 105 ℃ from normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00113059 CN1112260C (en) | 2000-06-20 | 2000-06-20 | Process for preparing granular yellow chemical |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00113059 CN1112260C (en) | 2000-06-20 | 2000-06-20 | Process for preparing granular yellow chemical |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1283526A true CN1283526A (en) | 2001-02-14 |
| CN1112260C CN1112260C (en) | 2003-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00113059 Expired - Fee Related CN1112260C (en) | 2000-06-20 | 2000-06-20 | Process for preparing granular yellow chemical |
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| Country | Link |
|---|---|
| CN (1) | CN1112260C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817014A (en) * | 2014-02-21 | 2014-05-28 | 中南大学 | Preparation method for granular xanthate |
| CN108745654A (en) * | 2018-04-16 | 2018-11-06 | 湖北荆江选矿药剂有限公司 | A kind of ore dressing xanthate and preparation method thereof |
-
2000
- 2000-06-20 CN CN 00113059 patent/CN1112260C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103817014A (en) * | 2014-02-21 | 2014-05-28 | 中南大学 | Preparation method for granular xanthate |
| CN108745654A (en) * | 2018-04-16 | 2018-11-06 | 湖北荆江选矿药剂有限公司 | A kind of ore dressing xanthate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1112260C (en) | 2003-06-25 |
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