Formula and technique for extracting potassium carbonate and aluminum hydroxide and preparing siliceous fertilizer using slate with rich kalium

Abstract

The invention relates to a compounding recipe and technology to distill potassium carbonate and aluminum hydroxide by potassium-rich slate and to produce siliceous fertilizer. It belongs to fertilizer producing field. Its feature is that putting the potassium-rich slate ore and limestone into ball mill, cuber, rotary kilncalcnaton furnace, ball mill, digestion tank and filter according to calcium-silicon mol ratio. Then, part of rough potassium carbonate is used to confect correction liquor, and the other is used to gain potassium carbonate after concentration and crystallizing. The leached residue is rough potassium hydroxide, and pure potassium hydroxide would be gained by Bayer process technology. And other part is used to gain siliceous fertilizer after passing washer tank, drying apparatus and pulverizer. The invention could make the extraction rate of alumina reach to over 60% and that of kali reach to over 80%. It can transform the silicon element into siliceous fertilizer. The invention would not produce exhausted water and waste residue. Thus, the purpose of comprehensive utilization of resource would be realized.

Description

1. Technical field

[0001] The invention relates to a formula and process for extracting potassium carbonate and aluminum hydroxide from potassium-rich slate and preparing silicon fertilizer, belonging to the field of fertilizer manufacturing. 2. Background technology

[0002] The main components of potassium-rich slate are potassium feldspar and biotite, which are insoluble potassium and aluminum minerals. The content of potassium oxide is 10.5% to 13.5%, and the content of aluminum oxide is 13% to 19%. It can be used to produce potassium salt , alumina and other products are the main mineral raw materials. At present, countries all over the world produce potassium salt products, generally using soluble potassium ore as raw material. my country is a country that is short of soluble potassium resources and bauxite resources, but insoluble potassium ore resources are very rich.

[0003] From the 1970s, began to explore the work of extracting potassium carbonate and potassium ...

Examples

Embodiment 1

[0023] (1) Take potassium-rich slate ore (SiO 2 Content: 55%): 33 tons; Limestone (CaO content: 54%): 67 tons. The potassium-rich slate powder and limestone are mixed in a ball mill.

[0024] (2) Feed it into the granulating pan machine through the conveying device, make pellets with a diameter of 10-12mm in the granulating pan machine, and then feed them into the rotary kiln calciner from the kiln tail through the belt and screw feeder, and the raw meal Raise the temperature in the rotary kiln calciner, and after calcination at a high temperature of 1260-1300°C for 30 minutes, it is transported to the ball mill by the conveying device, and is pulverized by the ball mill to a particle size of 100-120 mesh for later use.

[0025] (3) prepare the adjusting solution with the thick potassium carbonate solution in the back stage process, adjust the K in the liquid composition 2 O is 29-31g / l, add the prepared clinker powder and adjustment solution into the dissolution tank, the ra...

Embodiment 2

[0029] (1) Take potassium-rich slate ore (SiO 2 content: 45%): 34.1 tons; limestone (CaO content: 50%): 65.9 tons, the potassium-rich slate powder and limestone are mixed in a ball mill.

[0030] (2) Feed it into the granulating tray machine through the conveying device, make pellets with a diameter of 8-10mm in the granulating tray machine, and then feed them into the rotary kiln calciner from the kiln tail through the belt and screw feeder, and the raw meal Raise the temperature in the rotary kiln calciner, and after calcination at a high temperature of 1260-1300 ° C for 40 minutes, it is transported to the ball mill by the conveying device, and is pulverized by the ball mill to a particle size of 100-120 mesh for later use.

[0031] (3) K in the composition of the adjustment solution 2 O is 25-28g / l, add the prepared clinker powder and adjustment solution into the dissolution tank, the ratio of adjustment solution to clinker powder is 2.3, dissolution temperature: 80°C, di...

Embodiment 3

[0035] (1) Take potassium-rich slate ore (SiO 2 content: 36%): 42.2 tons; limestone (CaO content: 54%): 57.8 tons, the potassium-rich slate powder and limestone are mixed in a ball mill.

[0036] (2) Feed it into the granulating tray machine through the conveying device, and make material balls with a diameter of 12-16mm in the granulating tray machine, and then enter the rotary kiln calciner from the kiln tail through the belt and screw feeder, and the raw meal Raise the temperature in the rotary kiln calciner, and after calcination at a high temperature of 1230-1280°C for 20 minutes, it will be transported to the ball mill by the conveying device, and crushed by the ball mill to a particle size of 100-120 mesh for later use.

[0037] (3) K in the composition of the adjustment solution 2 O is 34-36g / l, add the prepared clinker powder and adjustment solution into the dissolution tank, the ratio of adjustment solution to clinker powder is 2, dissolution temperature: 88°C, diss...

1. Technical field

[0001] The invention relates to a formula and process for extracting potassium carbonate and aluminum hydroxide from potassium-rich slate and preparing silicon fertilizer, belonging to the field of fertilizer manufacturing. 2. Background technology

[0002] The main components of potassium-rich slate are potassium feldspar and biotite, which are insoluble potassium and aluminum minerals. The content of potassium oxide is 10.5% to 13.5%, and the content of aluminum oxide is 13% to 19%. It can be used to produce potassium salt , alumina and other products are the main mineral raw materials. At present, countries all over the world produce potassium salt products, generally using soluble potassium ore as raw material. my country is a country that is short of soluble potassium resources and bauxite resources, but insoluble potassium ore resources are very rich.

[0003] From the 1970s, began to explore the work of extracting potassium carbonate and potassium ...

Examples

Embodiment 1

[0023] (1) Take potassium-rich slate ore (SiO 2 Content: 55%): 33 tons; Limestone (CaO content: 54%): 67 tons. The potassium-rich slate powder and limestone are mixed in a ball mill.

[0024] (2) Feed it into the granulating pan machine through the conveying device, make pellets with a diameter of 10-12mm in the granulating pan machine, and then feed them into the rotary kiln calciner from the kiln tail through the belt and screw feeder, and the raw meal Raise the temperature in the rotary kiln calciner, and after calcination at a high temperature of 1260-1300°C for 30 minutes, it is transported to the ball mill by the conveying device, and is pulverized by the ball mill to a particle size of 100-120 mesh for later use.

[0025] (3) prepare the adjusting solution with the thick potassium carbonate solution in the back stage process, adjust the K in the liquid composition 2 O is 29-31g / l, add the prepared clinker powder and adjustment solution into the dissolution tank, the ra...

Embodiment 2

[0029] (1) Take potassium-rich slate ore (SiO 2 content: 45%): 34.1 tons; limestone (CaO content: 50%): 65.9 tons, the potassium-rich slate powder and limestone are mixed in a ball mill.

[0030] (2) Feed it into the granulating tray machine through the conveying device, make pellets with a diameter of 8-10mm in the granulating tray machine, and then feed them into the rotary kiln calciner from the kiln tail through the belt and screw feeder, and the raw meal Raise the temperature in the rotary kiln calciner, and after calcination at a high temperature of 1260-1300 ° C for 40 minutes, it is transported to the ball mill by the conveying device, and is pulverized by the ball mill to a particle size of 100-120 mesh for later use.

[0031] (3) K in the composition of the adjustment solution 2 O is 25-28g / l, add the prepared clinker powder and adjustment solution into the dissolution tank, the ratio of adjustment solution to clinker powder is 2.3, dissolution temperature: 80°C, di...

Embodiment 3

[0035] (1) Take potassium-rich slate ore (SiO 2 content: 36%): 42.2 tons; limestone (CaO content: 54%): 57.8 tons, the potassium-rich slate powder and limestone are mixed in a ball mill.

[0036] (2) Feed it into the granulating tray machine through the conveying device, and make material balls with a diameter of 12-16mm in the granulating tray machine, and then enter the rotary kiln calciner from the kiln tail through the belt and screw feeder, and the raw meal Raise the temperature in the rotary kiln calciner, and after calcination at a high temperature of 1230-1280°C for 20 minutes, it will be transported to the ball mill by the conveying device, and crushed by the ball mill to a particle size of 100-120 mesh for later use.

[0037] (3) K in the composition of the adjustment solution 2 O is 34-36g / l, add the prepared clinker powder and adjustment solution into the dissolution tank, the ratio of adjustment solution to clinker powder is 2, dissolution temperature: 88°C, diss...

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