DD140712A1 - METHOD FOR IMPROVING FLOTATIVE RECOVERY OF FLUORITE AND CALCITE - Google Patents

Abstract

The invention relates to a method for improvement the flotative recovery of fluorite and calcite in use of carboxylates as a collector. The invention has the goal in the flotative mineral separation with carboxylates occurring as a collector To eliminate defects; The invention is the technical problem based, with the help of a flotation reagent, the flotative recovery of fluorite and calcite. The inventive method is that one to the suspension of the ground minerals and rocks in water before or simultaneously with the collector and the Other regulatory reagents include an alkylphenol polyglycol ether admits the collector in the finest distribution to the surface of the .Wertminerals fixed, with simultaneous function as Secondary collector. The invention can be applied both to the flotative Extraction of fluorite and calcite as well as barite, siderite, mica and feldspar find application.

Description

Process for improving the flotation of fluorite and calcite

Field of application _i the ßrf indun $. ,

The invention relates to a process for improving the flotation of fluorite and calcite when using carboxylates as a collector,

Characteristic of the known technical solutions

It is known that the minerals fluorite and calcite are recovered flotatively using carboxylates as collectors and various reagents with an invigorating effect.

In practice, fatty acids * such as z. B »oleic acid and tall oil (mixture of linoleic and linolenic acids as well as resin acids) used · Actuators for the gangue or for unwanted accompanying minerals are u« a. The following reagents are present in the complex: tannin, quebracho, ligninsulfonates, chromates, glassine, aluminum sulphate, starch, dextrin, gelatin, citric acid and phosphates. "Belevers are divalent and trivalent metal cations but also anions in certain minerals. · For flotative mineral separations with carboxylates as a collector, the following problems or negative effects occur: The collector consumption is influenced by the turbidity temperature and the water hardness, which causes a higher collector consumption and a lower discharge »

The selectivity of the carboxylate collector is low, which leads to difficulties in the flotative separation of the minerals and thus has an influence on the quality of the end product. The carboxylates are prone to form a poly layer on the mineral surface _e

The invention has the aim to eliminate the aforementioned economic men gel. ,

199259

Explanation of the essence of the invention

The invention is based on the technical object of improving the flotative production of fluorite and calcite with the aid of a flotation reagent.

The process according to the invention consists in adding to the suspension of the ground minerals and rocks in water before or simultaneously with the collector and the other regulating reagents an alkylphenol polyglycol ether which fixes the collector to the surface of the valuable mineral in the finest distribution, with simultaneous function as secondary collector. The linking group of the alkylphenol polyglycol ethers belongs to the non-ionic detergents having the structural formula

- 0 - (CH ₂ - CH ₂ - O) _n H.

In the application came in the process according to the invention a nonyl dodecylphenol with a Polyglykolätherkette of 6 moles of ethylene oxide, where η is between 4 and 8 u. R is an alkyl chain. Such detergents are used in the detergent industry and in textile finishing, they are produced in the DDE by the VSB Chemical Works Buna under the trade name "Emulgator MF ^fl . In the other, the abbreviation APÄO is used for the alkylphenol polyglycol ether",

The following results were surprisingly determined by the use of APÄ'O as a flotation reagent:

1. The consumption of collectors in the fluorite and calcite flotation dropped to approx. 40 fo _s whereby the consumption of collector without application of APlO is different for the minerals *

2, The quality of the products could be improved »

Fluorite concentrate (+) 2 % CaF ₂ absolute Calcite concentrate (V) 7 % white content

3 * The flotation process could be carried out at a clouding temperature

Pre-flotation + 8 ⁰ C post-cleaning. + 2 ⁰ C

to be carried out on the spreading and the collector's consumption without delusions »'

4. The output of the value component could be improved as follows:

Fluorite flotation: (+) 3 fo absolute calcite flotation: (+) 18 % absolute

By quantitatively very small and differentiated doses of ler (eg * oleic acid) in connection with a differentiated application of an APA'O hydrophobing differences on the different mineral surfaces are produced, which are much larger compared to the conventional technology. The use of APÄO will improve the effect of other rules "of the reagents improved"

Due to the different degree of hydrophobization, it is possible to achieve flotative separations with higher separation efficiency and recycling, while at the same time reducing collector consumption.

The process according to the invention proceeds according to the following process conditions:

The mined material is ground to separate a mineral component from the gangue or "minerals in the concentrate, with water in open-tube mills in an open circuit with classifiers." The millet should have a volume ratio of solid to water of 1: 4 to 1: 5 , _The pulp density is a function of the mineral and rock densities zwiehen 1.25 and 1.3 kg / are dnr. The following grains were found in the "fluorite" and calcite flotations ». Distributions before:

fraction 0 , 063 abe Pluoritauf £ Ealzitaufgabe 48.2 Γη mm MW 0 ,1 3 15.0 0 2 52.6 34.4 0.063 -, 0 , .315 15.8 2.4 0.1 - 26.0 0,2 - 5.6

The cloud density of the 3 ° lotion and the feed in t / h are listed in Tables I / A and II / A.

The reagents are added according to Tables I / A (fluorite flotation) and II / A (calcite flotation). The addition of the reagents quebracho and water glass for the pre-flotation is already carried out after the grinding _; to achieve a longer exposure time.

Before the Ca mineral flotation, the metal sulfides are floated according to the classical method with xanthate, which will not be described here. The invention will be explained in more detail in two embodiments relating to fluorite and calcite flotation.

Example 1:

Fluorite flotation - Table I / B

The targeted application of a Uonyl-Dodecylphenols with a Polyglykolatherkette of 6 moles of ethylene oxide, where η is 4-8 (N-DPÄ'O) arise in addition to the greatly reduced consumption of collector, it is achieved a reduction in the collector amount by 64%, following Improvements in the treatment result;

- The CaPp application is increased by etv / a 3 ί> .

- Fluorite content increases by about 2 % *

- The problem component CaCO-, decreases in the concentrate by 1.3 % absolute.

Example 2;

Calcite flotation - Table II / B

With the application of 1T-DPÄ0 arise in calcite flotation

the following results compared without application;

- Calcite spreading increases by about 18 % absolute. "" - The whiteness increases by 7 % absolute ", ~ The collector consumption is reduced by 67 #.

Will flotation of barytes be achieved _? Siderite, mica and feldspar carboxylate used as a collector, it is possible to use in analogy to the method according to the invention also Alkylphenolpolyglykolätherals Plotationsreagenz. It was found that, as in the case of fluorite and calcite, the collector consumption drops below 50 % (300-500 g / t) even at a dose of 100 g H-DPiiO per tonne throughput.

Table I / A Trübe- cell Trübe- of the alkylphenol polyglycol ether in the Reagents in g / t Quebracho throughput diol N-DPJ Flotation conditions for the comparison to the application density ~ volume in m- * temp ο oleic acid Water octane Pluotite Flotation - Throughput; 8 t / h in kg / dm ^ in ⁰ C Glass • PH value Gait: Galeit, quartz 100 Siderite, sound 0.0 200 50 100 slate, gray 1.3 4.5 8th 200 50 300 50 25 waokeschiefer 1.25 3.0 4 , 50 50 100 - 20 1 «With application of 1.2 1.5 3 50 - 50 200 - ' N-BPÄO  1.2 • 3 6.8 .- 300 - 145 Yorflotation 6.7 300 450 1 β post-purification 6.7 100 2β'Nachreinigung 9.0 6.6 250 50 - 3. Post-cleaning 1.3 4.5 8th 700 50 400 50 - ' Sum of reagents 1.25 3.0 4 100 50 100 mm   - 2. Without application of 1.2 1.5 3 25 50 200 N-DPAO • 1,2 3 7.0 350 MK - TorfIotatan 5.8 825 550 1st post-cleaning 6.8 2nd post-cleaning 6.7 3. Post-cleaning. Sum of reagents

As Alkylphenolpolyglykolather the product emulsifier MP from YBB Bunawerk was used.

Table Ι / Β

Plot results with and without application of N-OPA'O after. Flotation conditions Table I / A

^{? f w} Fluoritflotation

Produlction

Composition CaCO ₃ SiO application

CaCO ₃ SiO ₂

1. With application of

ΪΓ-ΒΡΑΌ

Task for pre-flotation

Concentrate of the 3 »Uaoiu?

Departures from Yorflotation and post-purification

51.2 7.0, 23.4, 6.8

96.4 1.5 0.9 0.8

13.3. 11.6 42.2 11.8 100.0 100.0 100.0 100 _s 0

85.8 9.7

14.7 90.3

1.7 5 * 3

98.3 94.7

2. Without attachment of

H-EPÄO

Task for Torflotation

Concentrate of the 3 «ITaoreinigung

Departures from pre-flotation and post-purification

52.1 6.8 23.8 6.5

94.5 2.8 1.0 1.4

16.7 10.1 41.1 10.8

100.0 100.0 100.0 100.0

82.5 18.6

2.0 9.8

17.5 81.4 98.0 90.2

Table H / A

IFlotation conditions for the comparison of the use of the alkylphenol polyglycol ether in the Ealsitflo.tation - throughput 5 t / h

Gait; Fluorite, quartz turbid cell turbid. Tonseheifer dense volume temp »greywacke. in kg / dm · ⁵ in m in C pH Reagents in g / t throughput H-DPA "oleic acid octanediol Ua ₉ CO- ,.

1 * Using H-DPÄO

Vorflotation 1 · Εε, ο lire ini gang 2, postcleaning

Total:

1.3 9.0 8th 7.5 300 100 1 25 4.5 4 7.3 50 50 1.2 3.0 3 7.2 50 50

400 ·

200

2. Without Αητ / endung of

preflotation

1, after-cleaning

2, after-cleaning

Total:

1.3

1.25

1.2

9.0

4.5

8 4 3 8,5 8,2 8,0

900 200 100

1200

150

50 50

250

100 50 50

200

Table II / B

Plot results with and without application of H-DPÄO according to plot conditions. Table II / A "Calibrant flotation" '·';

product

Whiteness content in %

Composition in %

propose

Su. Ca

Min · CaCO ₃ CaP ₂ SiO ₂ R ₂ O ₃ Su.Ca. CaCO ₃ CaP ₂ SiG ₂ EgO ₃

1 ♦ With K-DPAO 62 »5 81.5 task 75 »5 95.6 Concentrate 3 _ft ITachreigung 21.4 Disposals 2 »Without I-DPÄO 62 _? 5 81.5 task 68 »2 93.0 concentrate 53.2 Disposals

65.2 16.3 12.2 2.0 100.0 100.0 100.0 100.0 100.0

75.8 19.7 0.2 1.6 19.5 1.7 63.1 3.6

94.9- 94.3 98.0 1.3 64, a 5.1 5.7 2.0 98.7 35.2

65.2 16.3 12.2 2.0 70.2 22.5 1.6 1.9 52.6 1.0 38.4 2.4

100.0 100.0 100.0 100.0 100, G 81.2 76.6 98.0 9.3 "77, Q 18.8 23.4 2.0 90.7 2.3, C

Claims (4)

1. Process for improving the flotation of fluorite and calcite when using carboxylates as a collector, characterized in that an alkylphenol polyglycol ether is used as the flotation agent. 2. Method for improving the flotation of. Fluorite and calcite according to item 1, characterized in that the alkylphenol polyglycol ether has an alkyl chain of 8-12 carbon atoms and preferably a degree of oxethylation of 4-8 mol. 3. The method according to item 1, characterized in that the addition of Alkylphenolpolyglykoläther in the Fluorite flotation 100 - 150 g / t throughput and at the Calcite flotation should be 250 - 350 g / t throughput preferably. 4. The method according to item 1 and 3, characterized in that the carboxylate dose in the Fluorite flotation 500 - 700 g / t pure fluoride and at the Ealzitflotation 600 - 800 g / t of reiricite in the task amounts. 5 '' method according to item 1, characterized in that the Kornverteiliing the Aufnnnung in about 0,063 mm '' 45 - 55 % 0,2 mm '' 2 - 5 % is * 6β Process according to item 1, characterized in that the cloud density in the pre-flotation 1.25 ~ 1.30 kg / dm ³
should amount to ·