CN114314631B - Barite purifying and whitening treatment method - Google Patents
Barite purifying and whitening treatment method Download PDFInfo
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- CN114314631B CN114314631B CN202210071544.1A CN202210071544A CN114314631B CN 114314631 B CN114314631 B CN 114314631B CN 202210071544 A CN202210071544 A CN 202210071544A CN 114314631 B CN114314631 B CN 114314631B
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Abstract
The invention belongs to the technical field of barite whitening, and discloses a barite purifying and whitening treatment method, which comprises the following steps: grinding barite into barite powder, adding a first complexing agent, and uniformly mixing to obtain a mixture; adding a first inorganic acid into the mixture for the first acid leaching treatment, deacidifying, washing with water, and drying to obtain the primarily purified and whitened barite powder; calcining the primarily purified and whitened barite powder at 900-1350 ℃ for 30-150 min to obtain a calcined product, namely purified and whitened barite; wherein the first inorganic acid is hydrochloric acid or nitric acid. The method of the invention is easy to operate, has low cost of the processing raw materials, has good purifying and whitening effects, and can improve the whiteness of the barite from 34% to 95.1%.
Description
Technical Field
The invention relates to the technical field of barite whitening, in particular to a treatment method for purifying and whitening barite.
Background
Barite is a dominant resource in China, and the yield is the first in the world. The barite in China contains higher impurities, is black and gray ores, but the barite with low whiteness cannot meet the application field of the barite, so that the export price of the barite in China is lower, the development of the barite industry in China is affected, and the efficient utilization of barite resources is not facilitated.
The purification and whitening scheme of the barite comprises manual selection, reselection, magnetic separation, chemical purification and whitening and the like. The barite containing carbon, iron, manganese, nickel and other impurities needs to be purified and whitened by a chemical method.
In the prior art, hydrofluoric acid is used as an acid leaching agent to be combined with calcination treatment, and the whiteness of the obtained barite is 88%; sulfuric acid is used as an acid leaching agent and matched with a complexing agent, and the whiteness of the obtained barite is 84.72%; the whiteness of the obtained barite can reach 93.5 percent by taking sulfuric acid as an acid leaching agent and calcining, but Ca in raw ore cannot be removed (calcium sulfate precipitation is generated), thereby affecting the purity; how to obtain barite with high whiteness and purity becomes a technical problem.
For this purpose, the invention provides a purification and whitening method for barite.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a barite purifying and whitening treatment method.
The barite purifying and whitening treatment method is realized by the following technical scheme:
a barite purifying and whitening treatment method comprises the following steps:
step 1, grinding barite to obtain barite powder with the particle size of more than 100 meshes, and then adding a first complexing agent into the barite powder to uniformly mix to obtain a mixture;
adding a first inorganic acid into the mixture for the first acid leaching treatment, deacidifying, washing with water, and drying to obtain the primarily purified and whitened barite powder;
calcining the primarily purified and whitened barite powder at 900-1350 ℃ for 30-150 min to obtain a calcined product, namely purified and whitened barite;
wherein the first inorganic acid is hydrochloric acid or nitric acid.
Further, the acid leaching temperature of the first acid leaching treatment is 25-95 ℃, and the acid leaching time is 30-90 min.
Further, when the first inorganic acid is hydrochloric acid, the product after the first acid leaching treatment is subjected to first acid leaching by using a second inorganic acid, washing for at least three times, and then deacidifying, washing with water and drying to obtain the preliminary purified and whitened barite powder.
Further, when the first inorganic acid is hydrochloric acid, grinding the calcined product into powder, adding a second complexing agent, uniformly mixing, then adding a second inorganic acid for carrying out second acid leaching treatment and second acid pickling, and then deacidifying, washing with water and drying to obtain the product which is the purified and whitened barite.
Further, the second complexing agent is a mixture of EDTA-2Na (disodium ethylenediamine tetraacetate) and IDS (tetra sodium iminodisuccinate), and the mass ratio of EDTA-2Na to IDS is 1:0.8-1.2.
Further, the second inorganic acid is hydrochloric acid, and the concentration of the hydrochloric acid is 1-3 mol/L.
Further, the mass ratio of the first complexing agent to the barite is 0.2-0.8 percent to 1;
the mass ratio of the first inorganic acid to the barite is 1-1.5:1.
Further, the first complexing agent is one or two of EDTA-2Na and IDS;
the first inorganic acid is one or two of hydrochloric acid and nitric acid.
Further, the first complexing agent is a mixture of EDTA-2Na and IDS, and the mass ratio of EDTA-2Na to IDS is 1:1-1.5.
Further, when the first inorganic acid is hydrochloric acid, the concentration of the hydrochloric acid is 2-12 mol/L;
when the first inorganic acid is nitric acid, the concentration of the nitric acid is 4-6 mol/L.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the complexing agent and the barite powder are uniformly mixed, so that the dispersibility of the complexing agent in the barite powder is improved, hydrochloric acid or nitric acid is added to carry out acid leaching on the complexing agent, the acid reacts with metal or metal oxide attached to the surface of the barite powder through acid leaching, so that the metal or metal oxide is ionized or a substance soluble in aqueous solution or dilute acid is generated, the complexing agent can complex the ionized metal in the acid leaching process, and further the purification of the barite powder is realized; and then, acid washing and water washing are carried out on the acid leaching product, so that the removal of substances which can be dissolved in aqueous solution or dilute acid is improved, the purification of barite is further improved, the purposes of impurity removal and purification are achieved, and the mineral grade is further improved.
According to the invention, the product after acid leaching treatment is dried and then calcined at high temperature, so that carbon contained in the barite generates carbon dioxide, the influence of carbon and other chromogenic impurities in the barite is removed, and the whitening of the barite is realized.
The whiteness of the barite raw material treated by the purification and whitening method can be improved to 95.1% from the original 34%, so that the requirements of the prepared lithopone raw material on the whiteness of the barite are met, and the low-whiteness barite is applied to more fields.
The invention realizes lower cost and simultaneously ensures that the whiteness of the barite reaches higher grade, and the process is simple.
Drawings
FIG. 1 is a graph showing the results of ICP-OES analysis of barite treated in example 46 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below. The barite raw material used in the invention is derived from Tianzhu county, guizhou, and the whiteness of the barite raw material is detected to be 34% after the barite raw material is ground into powder.
Example 1
The embodiment provides a barite purifying and whitening treatment method, which comprises the following steps:
weighing 25g of barite powder ground into powder, adding a first complexing agent EDTA-2Na into the barite powder, and uniformly mixing, wherein the mass ratio of EDTA-2Na to the barite powder is 0.9 percent to 1, so as to obtain a first mixture;
slowly adding a first inorganic acid (hydrochloric acid with the concentration of 5 mol/L) into the first mixture, and uniformly mixing to obtain a second mixture, wherein the mass ratio of the added hydrochloric acid volume to the barite powder is 5:4; reacting the second mixture for 1h in a water bath at 60 ℃, carrying out suction filtration on a reaction product, and washing the product obtained by suction filtration by adding 60mL of hydrochloric acid with the concentration of 2mol/l into the product three times; then washing the acid on the surface of the product by deionized water, and then treating the product at 150 ℃ for 40min to obtain the primary purified and whitened barite powder.
Calcining the obtained primary purified and whitened barite powder at 1100 ℃ for 1h to obtain purified and whitened barite.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 71.6%.
Example 2
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the first inorganic acid was 2mol/L hydrochloric acid.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 65.2%.
Example 3
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the first inorganic acid was 3mol/L hydrochloric acid.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 66.7%.
Example 4
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the first inorganic acid was 4mol/L hydrochloric acid.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 69.0%.
Example 5
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the first inorganic acid was 6mol/L hydrochloric acid.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 71.8%.
Example 6
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the first inorganic acid was 7mol/L hydrochloric acid.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 72%.
Example 7
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the first inorganic acid was 12mol/L hydrochloric acid.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 72.5%.
Example 8
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the second mixture was reacted in a water bath at 11 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was measured to be 64.7%.
Example 9
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the second mixture was reacted in a water bath at 25 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 67.2%.
Example 10
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the second mixture was reacted in a water bath at 55 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was measured to be 68.9%.
Example 11
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the second mixture was reacted in a water bath at 65 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 72.1%.
Example 12
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the second mixture was reacted in a water bath at 75 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 72.8%.
Example 13
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the second mixture was reacted in a water bath at 85 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 73.2%.
Example 14
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: in this example, the second mixture was reacted in a water bath at 95 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 76.8%.
Example 15
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that:
in this example, the second mixture was reacted in a water bath at 95 ℃;
in this example, the calcination temperature was 900 ℃;
in the embodiment, the mass ratio of the first complexing agent to the barite powder is 1 percent to 1, and the first complexing agent in the embodiment is EDTA-2Na and IDS which are mixed in equal mass.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was found to be 60.5%.
Example 16
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: in this example, the calcination temperature was 1000 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was measured to be 68.9%.
Example 17
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: in this example, the calcination temperature was 1100 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 74.9%.
Example 18
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: in this example, the calcination temperature was 1200 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 82.1%.
Example 19
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: in this example, the calcination temperature was 1250 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 81.8%.
Example 20
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: in this example, the calcination temperature was 1250 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 81.8%.
Example 21
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: in this example, the calcination temperature was 1300 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 82.0%.
Example 22
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: in this example, the calcination temperature was 1350 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 78.0%.
Example 23
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 15 is that: the calcination temperature in this example was 1200 ℃; and the calcination time of this example was 30min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 79.8%.
Example 24
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 21 is that: and the calcination time of this example was 90min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 82.3%.
Example 25
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 21 is that: and the calcination time of this example was 120min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 81.8%.
Example 26
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 21 is that: and the calcination time of this example was 120min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 80.8%.
Example 27
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and the embodiment 1 is that:
in this example, the second mixture was reacted in a water bath at 95 ℃;
in this example, the calcination temperature was 1200 ℃;
in the embodiment, the mass ratio of the first complexing agent to the barite powder is 0.2 percent to 1, and the first complexing agent in the embodiment is EDTA-2Na.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 78.7%.
Example 28
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 0.4% to 1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 80.5%.
Example 29
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 0.6% to 1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 81.3%.
Example 30
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 0.8% to 1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 83.6%.
Example 31
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 1%:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 82.6%.
Example 32
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in the embodiment, the mass ratio of the first complexing agent to the barite powder is 0.2 percent to 1, and the first complexing agent in the embodiment is IDS.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 81.3%.
Example 33
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 32 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 0.4% to 1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 82.4%.
Example 34
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 0.6% to 1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 84.6%.
Example 35
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 32 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 0.8% to 1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 84.1%.
Example 36
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 32 is that: in this example, the mass ratio of the first complexing agent to the barite powder was 1%:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 83.8%.
Example 37
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in the embodiment, the mass ratio of the first complexing agent to the barite powder is 0.8 percent to 1, the first complexing agent in the embodiment is IDS and EDTA-2Na, and the mass ratio of IDS to EDTA-2Na is 1:3.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 80.5%.
Example 38
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in the embodiment, the mass ratio of the first complexing agent to the barite powder is 1 percent to 1, the first complexing agent in the embodiment is IDS and EDTA-2Na, and the mass ratio of IDS to EDTA-2Na is 2:3.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 81.3%.
Example 39
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in the embodiment, the mass ratio of the first complexing agent to the barite powder is 1.2 percent to 1, the first complexing agent in the embodiment is IDS and EDTA-2Na, and the mass ratio of IDS to EDTA-2Na is 1:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 82.4%.
Example 40
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in the embodiment, the mass ratio of the first complexing agent to the barite powder is 1.4 percent to 1, the first complexing agent in the embodiment is IDS and EDTA-2Na, and the mass ratio of IDS to EDTA-2Na is 4:3.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 84.6%.
Example 41
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: in the embodiment, the mass ratio of the first complexing agent to the barite powder is 1.6 percent to 1, the first complexing agent in the embodiment is IDS and EDTA-2Na, and the mass ratio of IDS to EDTA-2Na is 5:3.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 84.1%.
Example 42
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that:
in the embodiment, the mass ratio of the first complexing agent to the barite powder is 0.6 percent to 1, and the first complexing agent in the embodiment is IDS.
In the embodiment, the calcined product is ground into powder, a second complexing agent is added into the powder to be uniformly mixed, a second inorganic acid is added into the powder to be uniformly mixed, the mixture is placed in a water bath at 95 ℃ to react for 20min, suction filtration is carried out, the filter residue after the suction filtration is washed by adding 60mL of hydrochloric acid with the concentration of 2mol/l into the filter residue for three times, then deionized water is used for washing the acid on the surface of the filter residue, and the filter residue is dried at 150 ℃ to obtain the purified and whitened barite.
The second complexing agent of this example was IDS, and the mass ratio of IDS to calcined product powder was 0.8:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 84.1%.
Example 43
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and implementation 43 is that: the mass ratio of IDS to calcined product powder of this example was 0.4:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 90.1%.
Example 44
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: the second complexing agent of this example was EDTA-2Na, and the mass ratio of EDTA-2Na to the calcined product powder was 0.8:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 89.9%.
Example 45
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: the second complexing agent of this example was EDTA-2Na, and the mass ratio of EDTA-2Na to the calcined product powder was 0.4:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 90.3%.
Example 46
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 27 is that: the second complexing agent of this example was EDTA-2Na and IDS mixed at equal mass, and the mass ratio of the second complexing agent of this example to the calcined product powder was 0.8:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 91.1%.
Example 47
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 1 is that: the first inorganic acid of this embodiment is nitric acid; and the second mixture was reacted in this example in a water bath at 25 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 63.1%.
Example 48
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 47 is that: in this example, the second mixture was reacted in a water bath at 55 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 66.2%.
Example 49
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 47 is that: in this example, the second mixture was reacted in a water bath at 65 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was measured to be 68.9%.
Example 50
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 47 is that: in this example, the second mixture was reacted in a water bath at 75 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 72.4%.
Example 51
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 47 is that: in this example, the second mixture was reacted in a water bath at 85 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 77.3%.
Example 52
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 47 is that: in this example, the second mixture was reacted in a water bath at 95 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 88.0%.
Example 53
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 900 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 79.7%.
Example 54
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1000 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 81.5%.
Example 55
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1050 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 84.5%.
Example 56
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1100 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 86.0%.
Example 57
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1150 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 87.3%.
Example 58
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1200 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 89.8%.
Example 59
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1250 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 90.9%.
Example 60
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1300 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 93.5%.
Example 61
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the calcination temperature in this example was 1350 ℃.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 95.1%.
Example 62
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 58 is that: the calcination time in this example was 30min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 89.5%.
Example 63
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 58 is that: the calcination time in this example was 90min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 90.3%.
Example 64
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 58 is that: the calcination time in this example was 120min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 95.1%.
Example 66
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between this embodiment and embodiment 58 is that: the calcination time in this example was 150min.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 94.5%.
Example 67
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the first mineral acid of this example was IDS, and the mass ratio of IDS to barite powder was 0.6:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 92.4%.
Example 68
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the first inorganic acid of this example was EDTA-2Na, and the mass ratio of EDTA-2Na to barite powder was 0.6:1.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 92.2%.
Example 69
The present embodiment provides a treatment method for purifying and whitening barite, and the difference between the present embodiment and embodiment 52 is that: the mass ratio of the first inorganic acid to the barite powder in the embodiment is 1.4 percent to 1;
the first inorganic acid of this example was a mixture of EDTA-2Na and IDS, and the mass ratio of EDTA-2Na to IDS was 4:3.
The whiteness of the barite obtained by the purification and whitening in this example was measured by a whiteness meter after grinding the barite into powder, and the whiteness of the barite obtained by the purification and whitening in this example was 94.5%.
Experimental part
In order to verify the purification effect of the method of the invention, the invention performs the following tests:
the invention adopts an inductively coupled plasma emission spectrometer (ICP-OES) to carry out qualitative and quantitative analysis on the barite raw material powder which is not subjected to any treatment and the barite which is purified and whitened after being treated by the example 46, and the result is shown in figure 1, wherein the raw mineral powder is a barite raw material powder sample which is not subjected to any treatment in figure 1; the treated sample was a purified whitened barite sample from example 46.
As can be seen from FIG. 1, the barite raw material powder without any treatment contains 0.185% of Fe, 0.011% of Mg, 0.017% of Mn, 0.002% of Mo, 0.004% of Ni, 0.083% of P, 0.264% of Si, 0.004% of Sr, 0.008% of V and 0.002% of Cu. The purified and whitened barite treated in example 46 contained 0.016% Fe, 0.001% Mg, 0.0005% Mn, 0.001% Mo, 0.004% Ni, 0.003% P, 0.047% Si, 0.001% Sr, 0.002% V, and 0.0005% Cu.
As can be seen from FIG. 1, the method for purifying and whitening barite of the present invention can effectively remove the main color-inducing impurities contained in barite, and the contents of Cu element and Mn element in barite after treatment are all less than 0.0005%, and can be considered as complete removal, fe element is removed from 0.185% to 0.016%, si element is removed from 0.264% to 0.047%, mo element is removed from 0.002% to 0.001%, and V element is removed from 0.008% to 0.002%.
It should be apparent that the embodiments described above are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (9)
1. The barite purifying and whitening treatment method is characterized by comprising the following steps of:
grinding barite into barite powder, adding a first complexing agent, and uniformly mixing to obtain a mixture;
adding a first inorganic acid into the mixture for the first acid leaching treatment, deacidifying, washing with water, and drying to obtain the primarily purified and whitened barite powder;
calcining the barite powder subjected to primary purification and whitening at 900-1350 ℃ for 30-150 min to obtain a calcined product, namely the purified and whitened barite;
wherein the first inorganic acid is hydrochloric acid or nitric acid;
when the first inorganic acid is hydrochloric acid, grinding the calcined product into powder, adding a second complexing agent, uniformly mixing, then adding a second inorganic acid for carrying out second acid leaching treatment and second acid pickling, and then deacidifying, washing with water and drying to obtain the product, namely the purified and whitened barite.
2. The method for purifying and whitening barite according to claim 1, wherein the acid leaching temperature of the first acid leaching treatment is 25-95 ℃, and the acid leaching time is 30-90 min.
3. The method for purifying and whitening barite according to claim 2, wherein when the first inorganic acid is hydrochloric acid, the product after the first acid leaching treatment is subjected to first acid leaching with a second inorganic acid, washing for at least three times, then deacidifying, washing with water, and drying to obtain the barite powder with preliminary purification and whitening.
4. The method for purifying and whitening barite according to claim 1, wherein the second complexing agent is a mixture of disodium edetate and tetrasodium iminodisuccinate, and the mass ratio of the disodium edetate to the tetrasodium iminodisuccinate is 1:0.8-1.2.
5. The method for purifying and whitening barite according to claim 1, wherein the second inorganic acid is hydrochloric acid, and the concentration of the hydrochloric acid is 1-3 mol/L.
6. The method for purifying and whitening barite according to claim 1, wherein the mass ratio of the first complexing agent to the barite is 0.2% -0.8:1;
the mass ratio of the first inorganic acid to the barite is 1-1.5:1.
7. The method of purifying and whitening barite according to claim 1, wherein said first complexing agent is one or both of disodium edetate and tetrasodium iminodisuccinate.
8. The method for purifying and whitening barite according to claim 7, wherein the first complexing agent is a mixture of disodium edetate and tetrasodium iminodisuccinate, and the mass ratio of the disodium edetate to the tetrasodium iminodisuccinate is 1:1-1.5.
9. The method for purifying and whitening barite according to claim 1, wherein when the first inorganic acid is hydrochloric acid, the concentration of the hydrochloric acid is 2-12 mol/L;
when the first inorganic acid is nitric acid, the concentration of the nitric acid is 4-6 mol/L.
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