CN111747387B - Yellow phosphorus mineral powder pelletizing binder, mineral powder pellets and preparation method thereof - Google Patents
Yellow phosphorus mineral powder pelletizing binder, mineral powder pellets and preparation method thereof Download PDFInfo
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- CN111747387B CN111747387B CN201910246937.XA CN201910246937A CN111747387B CN 111747387 B CN111747387 B CN 111747387B CN 201910246937 A CN201910246937 A CN 201910246937A CN 111747387 B CN111747387 B CN 111747387B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/01—Treating phosphate ores or other raw phosphate materials to obtain phosphorus or phosphorus compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/02—Preparation of phosphorus
- C01B25/027—Preparation of phosphorus of yellow phosphorus
Abstract
The invention discloses a yellow phosphorus mineral powder pelletizing binder, a mineral powder pellet and a preparation method thereof, and belongs to the technical field of comprehensive utilization of mineral resources. Book (I)The invention uses sulfuric acid and aluminum hydroxide as raw materials to prepare sulfate yellow phosphorus mineral powder adhesive; the powdered rock phosphate or the mineral powder left by the mine production concentrate is mixed with the sulfate yellow phosphorus mineral powder binder, and the mixture is uniformly mixed by a double-roller mixer, and is pelletized by a ball press, dried and automatically condensed to form mineral powder pellets. The prepared binder has low cost, and the formed ore powder ball has high compressive strength which can reach more than 100 kilograms at normal temperature; good thermal stability, no burst at high temperature of 1000 ℃, completely meets the production requirement of yellow phosphorus, and can take away CO in ground phosphate rock2The power consumption of yellow phosphorus production is reduced, and the cost is saved.
Description
Technical Field
The invention relates to a yellow phosphorus mineral powder pelletizing binder, a mineral powder pellet and a preparation method thereof, and belongs to the technical field of comprehensive utilization of mineral resources.
Background
Yellow phosphorus is an important chemical raw material, and various phosphides and phosphates produced by using the yellow phosphorus as a raw material have various varieties and wide application. High-grade lump ore is needed in yellow phosphorus production, however, due to the exploitation for many years, the remaining lump ore for yellow phosphorus production in China is not enough, and the yellow phosphorus production requirement is difficult to meet. The existing yellow phosphorus ore mainly takes low-grade and powdery yellow phosphorus ore as main materials, the low-grade yellow phosphorus ore needs to be subjected to mineral separation in the yellow phosphorus processing process, and the mineral powder remained after mineral separation needs to be pelletized before yellow phosphorus production can be carried out again.
Nowadays, the technology of adding a binder into mineral powder to prepare phosphate rock powder pellets and further producing yellow phosphorus is widely researched. In the prior art, binders containing sodium ions are adopted as yellow phosphorus mineral powder pelletizing binders. For example, in patent No. 201210000167.9, a binder prepared from humic acid and sodium hydroxide is used; in patent No. 201510336915.4, Na2O、Al2O3Binder made of one or more of modified crude phosphoric acid, silicate, sepiolite and bentonite with content of 0.1-1.2%; in patent CN201610952966.4, mixed slurry prepared from water glass, clay and paper pulp is used as a binder and added into powdered rock phosphate to prepare pellets; in patent CN201810001422.9, sodium hydroxide reacts with industrial by-products of silicon oxide to produce a mineral powder balling binder. The chemical reactions within the furnace during yellow phosphorus production are further complicated by the conductivity and chemical activity of the sodium ions. Meanwhile, the content of carbonate and organic matters generated in the furnace is not reduced.
Another mineral powder pelletizing binder is clay. When the mineral powder pelletizing adhesive is used, the percentage content of phosphorus in raw ore is reduced, the amount of furnace slag and phosphorus loss are increased, and the economic benefit is reduced.
In summary, there are many methods for preparing yellow phosphorus ore powder pellets by adding a phosphorus ore powder binder, but there is no technical document for preparing yellow phosphorus ore powder pellets by using sulfate as an ore powder binder and adding sulfuric acid and powdered rock phosphate.
Disclosure of Invention
The invention aims to provide a yellow phosphorus mineral powder pelletizing adhesive, mineral powder pellets prepared by the adhesive and a method thereof.
In order to achieve the above purpose, the invention is realized by the following technical scheme.
A yellow phosphorus mineral powder balling binder is formed by mixing a sulfuric acid solution and aluminum hydroxide, wherein the mass concentration of the sulfuric acid solution is 50%, and the addition amount of the aluminum hydroxide is 1 wt%.
The mineral powder pellet is prepared by the following steps:
step 1, weighing phosphate rock powder with the water content of 1-15%, adding a certain amount of water to enable the water content of the phosphate rock powder to be 15%, adding 4-6 parts by weight of a binder, uniformly mixing by using a double-roller mixer, reacting the binder and the phosphate rock powder in the mixing process, and removing carbon dioxide and organic matters in carbonate after reaction;
step 2, conveying the uniformly mixed powder to a ball press machine through a belt for ball pressing;
and 3, sending the formed spheres to a vertical kiln drying device, drying at 300 ℃ for 3h, drying and solidifying to obtain the product.
Further, in the step 2, the uniformly mixed powder is conveyed to a ball press machine through a belt and is pressed under the pressure of 20-50 tons.
Further, the mineral powder is pelletized, and the diameter of the pellets is 35-38 mm.
Compared with the prior art, the invention has the beneficial effects that: the invention mixes sulfuric acid and aluminum hydroxide to prepare sulfate mineral powder binder, and then prepares yellow phosphorus mineral powder pellets by matching with phosphate rock powderThe compression strength of the formed ore powder ball is high and can reach more than 100 kilograms at normal temperature; good thermal stability, no burst at 1000 ℃, and completely meets the production requirement of yellow phosphorus. At the same time, can take away CO in the ground phosphate rock2The power consumption of yellow phosphorus production is reduced, and the cost is saved.
Drawings
FIG. 1 is a flow chart of the process for preparing mineral powder pellets according to the invention.
Detailed Description
The present invention will be further described with reference to the following detailed description and the accompanying drawings.
Example 1
The preparation method of the yellow phosphorus mineral powder pelletizing adhesive comprises the following specific implementation steps:
step 1, preparing concentrated sulfuric acid into an aqueous solution with the mass percentage concentration of 50%.
And 2, adding 1wt% of aluminum hydroxide into 50% of sulfuric acid aqueous solution to obtain a binder stock solution.
Referring to fig. 1, the preparation method of the mineral powder pellets of the present invention comprises the following specific steps:
step 1, screening phosphate rock powder from production enterprises or mineral powder left in mine production concentrate. The block mineral aggregate is directly used for yellow phosphorus production, and the powder enters the batching step.
And 2, weighing 100 parts by weight of powdered rock phosphate with the water content of 15% (85 parts by weight of dry powdered rock phosphate), adding 5 parts by weight of binder stock solution for blending without additionally adding water because the water content of the powdered rock phosphate raw material reaches 15%, and uniformly mixing by using a double-roller mixer. In the mixing process, sulfuric acid and a sulfate binder react with the mineral powder, and carbon dioxide and organic matters in the carbonate are removed at the same time.
Step 3, conveying the uniformly mixed powder to a ball press through a belt, and pressing the powder under the pressure of 25-35 tons;
and 4, after the spherical body is formed, sending the spherical body to a self-made vertical kiln drying device, drying and solidifying the spherical body at the temperature of 300 ℃ for 3h to obtain the product. The self-made drying device can reduce the drying damage rate and improve the balling rate at the same time. The pellets were measured to have a diameter of 35-38 mm. The compression strength of the pellet is more than 100kg, and the high temperature resistance can reach more than 1000 ℃ (and the pellet is not broken after being heated to 1000 ℃).
Example 2
Referring to fig. 1, the preparation method of the mineral powder pellets of the present invention comprises the following specific steps:
step 1, phosphate rock powder screened by a production enterprise or mineral powder left by mine production concentrate, wherein the massive mineral aggregate is directly used for yellow phosphorus production, and the powder enters the batching step.
Step 2, weighing 85.85 parts by weight of powdered rock phosphate with water content of 1% (dry weight of powdered rock phosphate is 85 parts by weight), adding 14.15 parts by weight of water to enable the water content of the powdered rock phosphate to reach 15%, and adding 5 parts by weight of binder stock solution for batching. Mixing with a double-roller mixer. In the mixing process, sulfuric acid and a sulfate binder react with the mineral powder, and carbon dioxide and organic matters in the carbonate are removed at the same time.
Step 3, conveying the uniformly mixed powder to a ball press machine through a belt to press balls under the pressure of 25-35 tons
And 4, after the spherical body is formed, sending the spherical body to a self-made vertical kiln drying device, drying and solidifying the spherical body at the temperature of 300 ℃ for 3h to obtain the product. The self-made drying device can reduce the drying damage rate and improve the balling rate at the same time. The pellets were measured to have a diameter of 35-38 mm. The compression strength of the pellet is more than 100Kg, the high temperature resistance can reach more than 1000 ℃, and the pellet is not broken after the high temperature of 1000 ℃.
Example 3
Referring to fig. 1, the preparation method of the mineral powder pellets of the present invention comprises the following specific steps:
step 1, phosphate rock powder screened by a production enterprise or mineral powder left by mine production concentrate, wherein the massive mineral aggregate is directly used for yellow phosphorus production, and the powder enters the batching step.
Step 2, weighing 94.4 parts by weight of powdered rock phosphate with the water content of 10% (85 parts by weight of dry powdered rock phosphate), adding 5.6 parts by weight of water to ensure that the water content of the powdered rock phosphate reaches 15%, and adding 6 parts by weight of binder stock solution. Mixing with a double-roller mixer. In the mixing process, sulfuric acid and a sulfate binder react with the mineral powder, and carbon dioxide and organic matters in the carbonate are removed at the same time.
Step 3, conveying the uniformly mixed powder to a ball press machine through a belt to press balls under the pressure of 25-35 tons
And 4, after the spherical body is formed, conveying the spherical body to a self-made vertical kiln drying device, drying at 300 ℃ for 3 hours, drying and solidifying to obtain the product. The self-made drying device can reduce the drying damage rate and improve the balling rate at the same time. The pellets were measured to have a diameter of 35-38 mm. The compression strength of the pellet is more than 100Kg, the high temperature resistance can reach more than 1000 ℃, and the pellet is not broken after the high temperature of 1000 ℃.
Claims (7)
1. The yellow phosphorus ore powder pelletizing adhesive is characterized by being prepared by mixing a sulfuric acid solution and aluminum hydroxide, wherein the mass concentration of the sulfuric acid solution is 50%, and the adding amount of the aluminum hydroxide is 1wt% and is added into the sulfuric acid solution with the mass concentration of 50%.
2. The mineral powder pellet is characterized by being prepared by the following steps:
step 1, weighing phosphate rock powder with the water content of 1-15%, adding a certain amount of water to enable the water content of the phosphate rock powder to be 15%, adding 4-6 parts by weight of the binder according to claim 1, uniformly mixing the ingredients through a double-roller mixer, reacting the binder and the phosphate rock powder in the mixing process, and removing carbon dioxide and organic matters in carbonate after reaction;
step 2, conveying the uniformly mixed powder to a ball press machine through a belt for ball pressing;
and 3, drying and solidifying the obtained spheres at 300 ℃ for 3h to obtain the product.
3. The mineral powder pellets as claimed in claim 2, wherein in step 2, the uniformly mixed powder is conveyed to a ball press via a belt and pressed under a pressure of 20-50 tons.
4. The ore powder pellets of claim 2, wherein the ore powder pellets have a diameter of 35 to 38 mm.
5. The preparation method of the mineral powder pellets is characterized by comprising the following steps:
step 1, weighing phosphate rock powder with the water content of 1-15%, adding a certain amount of water to enable the water content of the phosphate rock powder to be 15%, adding 4-6 parts by weight of the binder according to claim 1, uniformly mixing the ingredients through a double-roller mixer, reacting the binder and the phosphate rock powder in the mixing process, and removing carbon dioxide and organic matters in carbonate after reaction;
step 2, conveying the uniformly mixed powder to a ball press machine through a belt for ball pressing;
and 3, drying and solidifying the obtained spheres at 300 ℃ for 3h to obtain the product.
6. The method of claim 5, wherein in step 2, the uniformly mixed powder is conveyed to a ball press via a belt and pressed under a pressure of 20 to 50 tons.
7. The method of claim 5, wherein the ore powder pellets have a diameter of 35-38 mm.
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| CN114717412B (en) * | 2022-04-18 | 2023-01-20 | 湖南中科颂辉科技有限公司 | Binder for cold-pressed pellets, cold-pressed pellets and preparation method of binder |
| CN116062721A (en) * | 2022-10-29 | 2023-05-05 | 马边无穷矿业有限公司 | Method for utilizing all elements of phosphate tailings |
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| DE2945118C2 (en) * | 1979-11-08 | 1981-12-03 | Hoechst Ag, 6000 Frankfurt | Stabilized red phosphorus and process for its manufacture |
| SU1063771A1 (en) * | 1982-09-29 | 1983-12-30 | Джамбульский Технологический Институт Легкой И Пищевой Промышленности | Batch for agglomerating phosphate raw material |
| SU1325013A1 (en) * | 1985-10-14 | 1987-07-23 | Казахский Химико-Технологический Институт | Method of recovering phosphorus from slime |
| EP3052271B1 (en) * | 2013-10-04 | 2021-04-21 | 3M Innovative Properties Company | Bonded abrasive articles and methods |
| CN107254260A (en) * | 2017-06-06 | 2017-10-17 | 河南中耐高科炉衬材料有限公司 | Multi-functional abrasion-proof and refractory adhesive and its production method |
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