Efficient mirabilite gypsum flotation purification process

A technology of Glauber's salt and gypsum, which is applied in flotation, solid separation, etc., can solve the problems of poor economy, limited industrial application, and high energy consumption, and achieve the effects of improving the whiteness of concentrate, maximizing resource utilization, and high purity

Active Publication Date: 2021-08-24
SICHUAN TONGQING NANFENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current gypsum purification process mainly includes two processes: physical purification and chemical purification. The physical purification method usually adopts hydrocyclone separation or particle fractionation, and the waste gypsum is purified by physical means. The cost is low, but the obtained purified gypsum The quality of the gypsum is also low; the chemical purification method is to dissolve the gypsum in the extract, and recrystallize the gypsum by heating, cooling o...

Method used

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  • Efficient mirabilite gypsum flotation purification process

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Embodiment 1

[0039] refer to figure 1 , a high-efficiency Glauber's salt gypsum flotation purification process, specifically comprising the following steps:

[0040] (1) Glauberite ore is prepared into Glauber's salt gypsum slurry; wherein the mass concentration of Glauber's salt gypsum slurry is 16%; wherein the pH value of Glauber's salt gypsum slurry is adjusted to 6;

[0041] (2) Rough separation: Add sodium sulfate, inhibitor and collector to the Glauber's salt gypsum slurry to obtain rough separation foam and rough separation; wherein the temperature of flotation is 25°C, and the scraping time is 5 minutes; the inhibitor It is sodium silicate, and the dosage of sodium silicate is 2000g / t; the collector includes sodium oleate, and the dosage of sodium oleate is 1500g / t; the dosage of sodium sulfate is 1280g / t;

[0042] (3) Sweeping: add collector to the rough selection, obtain the cleaning and tailings, and return the cleaning to the roughing; wherein the collector includes sodium ol...

Embodiment 2

[0047] refer to figure 1 , a high-efficiency Glauber's salt gypsum flotation purification process, specifically comprising the following steps:

[0048] (1) Glauberite ore is prepared into Glauber's salt gypsum slurry; wherein the mass concentration of Glauber's salt gypsum slurry is 30%; wherein the pH value of Glauber's salt gypsum slurry is adjusted to 8;

[0049] (2) Rough separation: Add sodium sulfate, inhibitor and collector to the Glauber's salt gypsum slurry to obtain rough separation foam and rough separation; the temperature of flotation is 35°C, and the scraping time is 6 minutes; the inhibitor It is sodium silicate, and the dosage of sodium silicate is 2600g / t; the collector includes sodium oleate, and the dosage of sodium oleate is 2300g / t; the dosage of sodium sulfate is 2500g / t;

[0050] (3) Sweeping: add collector to the rough selection, obtain the cleaning and tailings, and return the cleaning to the roughing; wherein the collector includes sodium oleate, an...

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Abstract

The invention relates to the technical field of mirabilite gypsum purification, and in particular, relates to an efficient mirabilite gypsum flotation purification process, wherein the process comprises the steps: firstly, preparing mirabilite gypsum slurry from glauberite, then sequentially carrying out roughing, scavenging and three times of concentration, and finally obtaining final concentrate from finally obtained foam through a dehydration system. The purity of CaSO4.2H2O in the concentrate product obtained through the process is high, the recovery rate is high, and maximum utilization of glauberite ore resources is achieved.

Description

technical field [0001] The invention relates to the technical field of mirabilite gypsum purification, in particular to a high-efficiency mirabilite gypsum flotation purification process. Background technique [0002] Gypsum is an important inorganic raw material. The chemical and construction industries consume a large amount of mineral natural gypsum every year. At the same time, gypsum is also a common industrial by-product. However, the industrial by-product gypsum contains more impurities and the purity of calcium sulfate is low. It cannot be used as a chemical The use of raw materials in the construction industry has little reuse value, and it is mainly stockpiled at present. Among them, the main component of Glauber's salt gypsum is mineral gypsum (CaSO 4 2H 2 The O grade is relatively low, only about 55%) and gangue minerals (the gangue minerals are mainly silicon-containing gangue (muscovite), and there are also a small amount of impurity elements such as Mg, Fe, ...

Claims

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Application Information

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IPC IPC(8): B03D1/018B03D101/06B03D101/02B03D103/02
CPCB03D1/018B03D2201/06B03D2201/02B03D2201/007B03D2203/02
Inventor 彭诗谷李伟石晴张国范
Owner SICHUAN TONGQING NANFENG
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