DE1102663B - Process for the electrostatic preparation of mineral mixtures - Google Patents

Description

GERMAN

The main patent 1 056 551 describes a process for the electrostatic processing of potash salts, after which it succeeds after chemical conditioning of the reprocessed items to separate the sylvin from this in a high percentage form. Organic conditioning agents serve as conditioning agents Sulfonic acids and sulfonates and their salts.

In the further development of this process it has now been found that this process also applies other mineral mixtures which do not contain any calcium salts can be used with very good success. It both ores and non-ores were found to be removed by this method of chemical conditioning with "sulfonic acids", as this whole class of substances is called in the following for the sake of brevity, for the electrostatic preparation can be made accessible can, as the following examples in Tables 1 and 2 show.

The procedure is as follows: The dry, on which in the electrostatic treatment Processing material ground to the usual grain size is in intimate contact with the conditioning agent brought. This can be done in any desired way, for example by having the conditioning agent is mixed in pure substance in a mixing device with the material to be processed, or in the form of a solution to the material to be processed by spraying in mixing drums, rotating drums or is added to other suitable devices. If a solvent has been used, it must must be removed again before the goods are placed on the electric separator.

The amount of conditioning agent to be applied depends on the material to be reprocessed and lies between 50 and 300 g of conditioning agent per ton, in general 100 to 200 g / t are completely sufficient.

The separation temperature at which the conditioned material is separated in the electrical separator is between room temperature and 200 ° C, preferably between 40 and 100 ° C. The optimal separation temperature Just like the optimal amount of conditioning agent, it is easy to determine through simple preliminary tests.

If a solvent has been used, the material to be processed can be heated to the temperature can advantageously be combined with the removal of the solvent by a heated Gas stream, expediently air, is passed through the material to be processed.

Examples

For the examples in Table 1 below, a barite was used with a content of 89.7% for electrostatic processes
Processing of mineral mixtures

Addendum to patent 1,056,551

Applicant:

Potash Research Institute G. mb H.,
Hanover, Georgstr. 29

Dr.-Ing. Hans Autenrieth, Hanover-Kirchrode,

and Dr, rer. nat. Gerd Peuschel, Benthe (Hann.),

have been named as inventors

Ba SO ₄ , the gangue of which consisted essentially of quartz and also contained small amounts of Fe ₂ O ₃ and Al ₂ O ₃ . In addition, small amounts of strontium sulfate (SrSO ₄ ) were still present, but these are added to the barium sulfate in the analysis. For the examples in Table 2, a copper luster (Cu ₂ S) from the Congo was used, the gangue of which consisted of silicified slate. Table 3 describes the processing of a sulfur mineral from Weenzen / Celle, the gangue of which consists of gypsum, dolomite and anhydrite. Table 4 shows examples of the processing of chrome iron from the Transvaal, which has feldspar and quartz as gangue. The results of the processing of spate iron stone from the Westerwald, which contains quartz and a little dolomite as gangue, can be found in Table 5, and those of the processing of a zinc silicate (willemite) from New Jersey with quartz and little feldspar as gangue are found in Table 6. For the examples in Table 7, an apatite from Bamle / Norway was used, the rate of which

109 537/99

art consisted of feldspar and quartz. Finally, in Table 8 there are examples for the preparation

of a fluorspar from Scharzenfeld, which contains feldspar and a little barite as gangue.

Table 1

Heavy spar preparation Heavy spar with 89.7% BaSO ₄ gangue: quartz, Fe ₂ O ₃ , Al ₂ O ₃

Serial
No.
1 Conditioning agents
2 lot
g / t
3 Separating
temperature
⁰ C
4th yield
at BaS O ₄
%>
5 concentrate
(once after
concentrated)
¹ VoBaSO ₄
6th 1
2
3
4th
5
6th
7th
8th
9
10
11
12th
13th Without
ί Oxystearinsulphonic acid Na (»Prestabitöl«) \
> Na alkyl sulfonic acid ("Mersolat 30") I
r Na alkyl sulfonic acid ("Mersolate D") I
> Benzylsulfonic acid Na <
Sulphonated fatty acid amide (»Xynomine
Powder «)
I Na alkylnaphthalenesulfonic acid (»Mer- J
Γ pentine «) 1 150
100
100
200
100
200
100
200
300
200
50
100
200 100
40
80
80
40
80
40
80
40
40
80
80
80
50 71.5
97.4
97.0
96.2
97.2
97.6
97.0
96.8
96.6
97.3
97.2
96.9
97.6
96.5 92.3
97.1
98.1
98.1
98.0
98.2
98.3
98.4
97.2
97.0
96.7
97.3
98.4
98.3

Table 2

Copper ore processing Kupferglanz (Congo) with 2.9% Cu Gait: Silicified slate

Serial
No. Conditioning agents Without lot
g / t Separating
temperature
⁰ C Cu yield concentrate
(once after
concentrated)
VoCu 1 2 > Oxystearinsulphonic acid Na ("Prestabitöl") < 3 4th 5 6th ϊ Benzylsulfonic acid Na I 100 63.1 25.3 1
2
3 1 Na alkylnaphthalenesulfonic acid (»Mer- J
J pentine «) \ 50
100
200 100
80
80 93.2
94.6
95.0 53.0
54.8
56.4 4th
5 \ Alkylsulfonic acid Na ("Mersolat 30") j 100
100 80
40 91.2
90.8 56.5
56.4 6th
7th Na alkyl sulfonic acid ("Mersolate D") J 150
150 80
50 94.5
94.3 55.3
54.6 OO Ο 1 sulfonated fatty acid amide (»Xynomine J
J Powder «) \ 150
150 100
50 95.4
94.1 53.9
53.8 10
11 150
150 100
50 91.3
91.7 56.5
56.0 12th
13th 150
150 100
50 90.8
90.1 52.7
53.4

Table 3

Mineral element processing

Starting material: sulfur mineral (Weenzen / Celle) Gang type: gypsum, dolomite, anhydrite. Conditioning agent: 200 g / t raw material Separation temperature: 70 ° C

Serial
No. Starting
material
° / oS Conditioning agents yield
% First
concentrate
° / oS 1
2
3
4th
5 15th
13th
13th
14th
15th
15th Without
Oxystearinsulfonsaures Na ("Prestabitöl")
Na alkyl sulfonic acid ("Mersolat 30")
Benzoesulfonic acid Na
Sulphonated fatty acid amide ("Xynomine Powder")
Na alkylnaphthalenesulfonic acid ("merpentine") 70.0
95.0
95.0
90.0
91.0
93.0 26.0
64.0
84.0
90.0
55.0
81.0

Table 4

Oxide mineral processing

Starting material: Chrome iron stone (Transvaal) Gait: feldspar, quartz

Amount of conditioning agent: 200 g / t raw material separation temperature. · 70 ° C

Starting Conditioning agents Without yield First Serial
No. material
% Chromium Na alkyl sulfonic acid ("Mersolat D") of chrome
Eisenstein concentrate
% Chromium Eisenstein Sulphonated fatty acid amide ("Xynomine Powder") ° / o Eisenstein 47.1 Oxystearinsulfonsaures Na ("Prestabitöl") 73.4 68.6 1 43.5 α-Naphthalenesulfonic acid Na 86.3 77.5 2 41.7 88.4 64.3 3 45.6 86.5 79.7 4th 42.4 84.7 72.1

Table 5

Carbonate mineral processing Starting material: Spateisenstein (Westerwald) Gait: quartz, little dolomite. Amount of conditioning agent: 200 g / t raw material. Separation temperature: 70 ° C

Tf A Starting Conditioning agents Without yield First J-iIU *
No. material Oxystearinsulfonsaures Na ("Prestabitöl") on Fe CO ₃ concentrate ¹ VoFeCO ₃ Na alkyl sulfonic acid ("Mersolat 30") ° / o ⁰ ZoFeCO ₃ 50.0 Sulphonated fatty acid amide ("Xynomine Powder") 85.0 73.8 1 50.0 Na alkylnaphthalenesulfonic acid ("merpentine") 93.8 90.1 2 50.0 91.6 87.2 3 50.0 97.8 80.4 4th 49.0 95.8 84.7

Table 6

Silicate mineral processing Starting material: Willemite (New Jersey) Gait: quartz, little feldspar. Amount of conditioning agent: 200 g / t raw material Separation temperature: 70 ° C

No.
Serial Starting
material
VoZn ₂ SiO ₄ Conditioning agents yield
on Zn2 Si O4
% First
concentrate
"/ 0Zn ₂ SiO ₄ 1
2
3 59.2
54.2
55.3
52.0 Without
Oxystearinsulfonsaures Na ("Prestabitöl")
Na alkyl sulfonic acid ("Mersolat 30")
Na alkylnaphthalenesulfonic acid ("merpentine") 71.0
83.8
92.6
95.8 76.0
86.9
81.4
84.7

Table 7 Phosphate mineral processing

Starting material: apatite (Bamle / Norway) Gait: feldspar, quartz

Conditioning Medium quantity: 20O g / t raw material Separation temperature: 70 ° C

Serial
No. Starting
material
° / o apatite Conditioning agents yield
»/ Ο First
concentrate
° / o apatite 1
2
3 44.7
46.5
48.8
50.0 Without
Na alkyl sulfonic acid ("Mersolat 30")
Oxystearinsulfonsaures Na ("Prestabitöl")
Naphthylsulfonic acid Na 40.5
85.8
87.4
61.0 53.7
80.2
87.8
79.3

Haloid mineral processing table

Starting material: fluorspar (Scharzenfeld / Obpf.) Gait: feldspar, little barite conditioning Medium quantity: 200g / t raw material Separation temperature: 70 ° C

Serial
No. Starting
material Conditioning agents Without yield First
concentrate »/ Ο CaF ₂ Oxystearinsulfonsaures Na ("Prestabitöl") o / o VoCaF ₂ 35.0 Na alkyl sulfonic acid ("Mersolat 30") 83.4 49.0 1 51.0 Benzoesulfonic acid Na 99.2 83.0 2 47.0 Sulphonated fatty acid amide ("Xynomine Powder") 99.1 73.0 3 50.0 Na alkylnaphthalenesulfonic acid ("merpentine") 99.0 92.0 4th 48.0 99.1 75.0 5 39 98.9 62

In all of the examples in Tables 1 to 8, the procedure was that of comminution digested material was freed from adhering moisture and then conditioned. the The conditioning agents used in each case were in the form of aqueous solutions with 10 to 70% active substance is sprayed through a nozzle onto the material to be processed in a mixer, until the specified amount was applied. Then the property was replaced by a warm Air flow dried and heated to the respective separation temperature.

At this temperature it was separated in a three-stage electrical separator. In the case of the in Table 1 and 2 listed examples, the concentrate obtained in this way was again applied to the electrostatic precipitator given. The concentrates obtained in this way had the contents indicated in column 6. The yield is noted in column 5. In the examples contained in Tables 3 to 8, on the other hand, the values were given obtained at the first concentration. Again, through repeated conditioning and separation of the processed material a further increase in the concentrate levels and a further improvement in the yields can be achieved.

The resulting medium goods go in continuous The company returns to processing.

As the numerous examples show, the procedure described here can be used in a wide variety of ways Minerals possible to achieve separation results that are just as good, in some cases considerably better than the results to be achieved by flotative processing, while still having all the known advantages achieved (lower wear of the equipment, lower energy consumption), which is a dry process compared to a wet one.

55

6o

Claims (1)

Claim ·. Application of the process for the electrostatic processing of calcium salts with prior chemical conditioning with organic substances containing one or more SO ₄ Me or SO ₃ Me groups and 6 or more carbon atoms in the molecule, according to patent 1,056,551, to the electrostatic Processing of other mineral mixtures. © 109 537/99 3.