Method for decomposing potash feldspar ore by low temperature wet process

A potassium feldspar and wet process technology, applied in the field of decomposing potassium feldspar ore, can solve problems such as unsatisfactory comprehensive utilization of resources, high fluoride content, environmental or air pollution, etc., and achieves less discharge of three wastes and low preparation cost. , the effect of good market conditions

Inactive Publication Date: 2006-10-25
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology

In China, although many people have carried out development and research work, the energy consumption in the preparation process is high, especially the amount of fluoride is high, the com

Method used

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  • Method for decomposing potash feldspar ore by low temperature wet process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 Shown, the method for low-temperature wet method decomposition potassium feldspar ore, it comprises the steps:

[0031] 1), take by weighing 100g potassium feldspar powder (-200 order), add water 100ml, add the hydrochloric acid 18-20ml that weight concentration is 30%, stir 1 hour at 60 ℃, filter, wash (except Cl - ) to obtain mother liquor A and filter cake A; mother liquor A is used to prepare iron oxide red, and mother liquor A is neutralized to pH=9.5-10 by adding 30% ammonia water with a weight concentration, and is oxidized by blowing air at normal temperature, and the oxidation reaction is 1.5- For 2.5 h, the product obtained from the oxidation was filtered and washed with deionized water until free of Cl - (Generally 3-4 times), to obtain liquid B and filter cake B, dry the filter cake B at 120-125°C for 2-3h, then calcinate at 650-670°C for 1h, cool to room temperature, and pulverize to obtain iron oxide Red (Fe 2 o 3 ) 3.426g.

[0032] 2...

Embodiment 2

[0038] Weigh 100g of potassium feldspar, mix it with 10g of fluorite after removing impurities with hydrochloric acid, add recovery solution containing ammonium fluoride (NH 4 F content is 20%) 250ml, add 160ml sulfuric acid reaction 1.5 hours again, other processes are the same as embodiment 1, make iron oxide red 3.506g respectively, white carbon black 64.82g, flame retardant aluminum hydroxide 19.08g and potassium ammonium sulfate 52g(K 2 O is 20.83%).

Embodiment 3

[0040] Weigh 100g potassium feldspar powder, after hydrochloric acid treatment to remove impurities, add 5g fluorite ore powder and 260ml (NH 4 F is 19.5%), add 165ml sulfuric acid after mixing evenly, other operation steps are unchanged, make iron oxide red 3.61g respectively, white carbon black 66.25g, aluminum hydroxide 19.42g, potassium ammonium sulfate 53.06g (K 2 O is 20.53%).

[0041] From the above three examples, it can be seen that whether the potassium feldspar ore powder is decomposed with fluorite plus sulfuric acid or decomposed with NH 4 F is decomposed with sulfuric acid, and the decomposition utilization rate of ore reaches 95%, which shows that the present invention has better industrialized utilization prospect.

[0042] Indicator name

GB 10517-89

The average content of this technology

SiO 2 content

DBP oil absorption value

/ (ml / 100g)

BET specific surface area

/ (m 2 / g)

Sieve residue (45μm)

/ %

H...

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Abstract

The invention relates to a potassium feldspar decomposing method, namely a potassium feldspar low-temperature and wet decomposing method, characterized in that it comprises the steps of: 1) crushing potassium feldspar into <=200 meshes, adding in hydrochloric acid and water and obtaining mother solution A and filter cake A; and preparing ferric oxide red with the mother solution A; 2) mixing the filter cake A with fluoride mineral additive and water, adding pulp into a reactor, reacting and producing escaping SiF4 gas and preparing white carbon black; adding water to reaction product in the reactor, filtering and obtaining filtrate C and CaSO4 2H2O; 3) regulating the filtrate C with ammonia and obtaining filter cake D and mother solution D; preparing potassium ammonium sulphate with the mother solution D; 4) pulping the filter cake D with water and adding in sulphuric acid, filtering and obtaining filter cake E and filtrate E, mixing the filter cake E uniformly with SiO2 nH2O prepared in the step 2) and preparing white carbon black; 5) adding ammonia to the filtrate E and obtaining filter cake F and filtrate F, and preparing the filter cake F into fire retardant aluminum hydroxide. And the method has characters of a whole low-temperature course, low production cost, and full resources utilization.

Description

technical field [0001] The invention relates to a method for decomposing potassium feldspar ore. Background technique [0002] Potassium feldspar (Potash feldspar) is a kind of K 2 O, Al 2 o 3 , SiO 2 and contains Fe 2 o 3 Natural minerals with other impurities, the molecular formula is K 2 O·Al 2 o 3 ·6SiO2 2 . Potassium feldspar is the main raw material for porcelain glaze in the ceramic industry; it is a kind of glass mixture. It can increase the viscosity and chemical stability of enamel, and can also be used to make enamel raw materials, and can also be used as insulating electric porcelain materials; it is also a raw material for making potash fertilizers. There are also many countries that use potassium feldspar as a raw material for cement, and can be recycled to obtain K 2 SO 4 By-products (Edited by Wang Zhen. Chemical Dictionary (Third Edition) [M]. Beijing: Chemical Industry Press. 1992.602). The earliest domestic development and utilization of pota...

Claims

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Application Information

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IPC IPC(8): C01G49/02C01B17/96C01B33/113C01F11/46
Inventor 徐旺生刘晓木丁一刚李海霞曹栋汤璐
Owner WUHAN INSTITUTE OF TECHNOLOGY
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