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New process for comprehensively utilizing potassium feldspar

A technology of potassium feldspar and process, which is applied in the field of new technology for comprehensive utilization of potassium feldspar, can solve the problems of low utilization rate of potassium feldspar aluminum and silicon resources, low quality of potassium carbonate, environmental pollution, etc., and achieve maximum, Realize the value of silicon resources and the effect of realizing the value of resources

Inactive Publication Date: 2013-09-04
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned methods have their shortcomings respectively, such as the low quality of product potassium carbonate, low utilization rate of potassium feldspar aluminum and silicon resources, and easy to cause certain environmental pollution, etc.

Method used

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  • New process for comprehensively utilizing potassium feldspar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Potassium feldspar is ground to -320 mesh, mixed with powdery or granular potassium carbonate, and its dosage is based on the alkali ratio (K 2 o 总 +Na 2 o 总 ) / (Al 2 o 3总 +Fe 2 o 3总 ) is calculated as 1.25, after the two are mixed and granulated, they are sintered at 850°C for 20 minutes, and the obtained clinker is ground to -80 mesh, in KOH: 60g / L, K 2 CO 3 : Filter after leaching in the mixed solution of 60g / L, the leaching temperature is 60°C, the time is 20min, the leaching rates of potassium, aluminum and silicon in potassium feldspar potassium calculated by the mass composition of filter residue are: 81.5%, 14.3, 41.2% respectively .

[0029] The filtrate is carbonized at 60°C until the pH value is 7-8, and the precipitation rate of silicon in the filtrate can reach more than 98%.

[0030] Wash and grind the filter residue to -200 mesh, add powdered or granular potassium carbonate and -320 mesh limestone, and the dosage is based on the alkali ratio (K 2...

Embodiment 2

[0034] Potassium feldspar is ground to -320 mesh, mixed with powdery or granular potassium carbonate, and its dosage is based on the alkali ratio (K 2 o 总 +Na 2 o 总 ) / (Al 2 o 3总 +Fe 2 o 3总 ) is calculated as 1.25, after mixing and granulating the two, sintering at 850°C for 20 minutes, the obtained clinker is ground to -120 mesh, and in KOH: 80g / L, K 2 CO 3 : Filter after leaching in 80g / L mixed solution. The leaching temperature is 60°C and the time is 20min. Calculate the leaching rates of potassium, aluminum and silicon in potassium feldspar potassium based on filter residue components: 83.8%, 13.1%, 41.7% .

[0035] The filtrate is carbonized at 80°C until the pH value is 7-8, and the precipitation rate of silicon in the filtrate can reach 95%.

[0036] Wash and grind the filter residue to -200 mesh, add powdered or granular potassium carbonate and -260 mesh limestone, and the dosage is based on the alkali ratio (K 2 o 总 +Na 2 o 总 ) / (Al 2 o 3总 +Fe 2 o 3总 ) i...

Embodiment 3

[0040] Potassium feldspar is ground to -200 mesh, mixed with powdery or granular potassium carbonate, and its dosage is based on the alkali ratio (K 2 o 总 +Na 2 o 总 ) / (Al 2 o 3总 +Fe 2 o 3总 ) is calculated as 1.05, after the two are mixed and granulated, they are sintered at 810°C for 40 minutes, and the obtained clinker is ground to -160 mesh, and in KOH: 50g / L, K 2 CO 3 : Filter after leaching in 50g / L mixed solution. The leaching temperature is 60°C and the time is 20min. The leaching rates of potassium, aluminum, and silicon in potassium feldspar potassium calculated by filter residue components are: 79.6%, 11.9%, and 39.8% respectively. .

[0041] The filtrate is carbonized at 60°C until the pH value is 8, and the precipitation rate of silicon in the filtrate can reach more than 98%.

[0042] Wash and grind the filter residue to -320 mesh, add powdered or granular potassium carbonate and -200 mesh limestone, and the dosage is based on the alkali ratio (K 2 o 总 +...

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Abstract

The invention discloses a new process for comprehensively utilizing potassium feldspar. The new process comprises the following steps of: performing primary sintering on the potassium feldspar added with potassium carbonate or sodium carbonate, leaching the sintering clinker in a mixed solution of potassium hydroxide and potassium carbonate, and filtering, wherein the obtained filter residue is a raw material for secondary sintering, the obtained filtrate is subjected to carbon decomposition and filtration, partial silicon dioxide is recovered from filter residue for producing white carbon black, part of the filtrate is used for producing potassium salt and part of the filtrate returns to the primary leaching procedure; and performing secondary sintering, namely sintering primary sintering clinker leaching residue added with limestone and potassium carbonate, leaching the sintering clink in a mixed solution of potassium hydroxide and potassium carbonate, and filtering, wherein filter residue is taken as a cement production raw material, filtrate is added with calcium oxide for pressure desilication treatment, a solution subjected to desilication is subjected to carbon decomposition and filtration, and aluminum hydroxide is recovered from filter residue for producing diversified alumina. In the process of primary sintering and secondary sintering, the filtrate subjected to carbon decomposition and filtration is subjected to desilication, concentration and other processes, and the potassium carbonate can be recovered. By the process, the potassium feldspar value resource can be utilized maximally, the potassium carbonate can be recycled, and environment is protected.

Description

technical field [0001] The invention relates to a new process for comprehensive utilization of potassium feldspar. Background technique [0002] Potassium feldspar reserves in my country are extremely rich, mainly distributed in 23 provinces including Anhui, Inner Mongolia, Heilongjiang, Xinjiang, Sichuan, and Shanxi, and are widely distributed. Potassium feldspar is a water-insoluble potassium resource with high potassium content, the widest distribution and the largest reserves. [0003] my country has done a lot of research work on the comprehensive utilization of potassium feldspar, and has achieved many achievements in fertilizers, ceramics, white carbon black, and molecular sieves. At home and abroad, since the beginning of the 20th century, research on the use of potassium feldspar to make potash fertilizers has been carried out. Dozens of technological researches have been carried out successively, which can be divided into: blast furnace smelting method, autoclave ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12C01F7/02C04B7/24C01D7/00
CPCY02P40/10
Inventor 杨大锦廖元双彭秋燕刘俊场付维琴周卫国
Owner KUNMING METALLURGY INST
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