A preparation method of phosphate rock powder or crushed phosphate rock binder and a molded ore production method

A technology for preparing binder and phosphate rock powder is applied in the field of comprehensive utilization of mineral resources to achieve the effects of increasing production capacity, increasing viscosity and reducing production equipment

Active Publication Date: 2021-05-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] To sum up, around the molding technology of crushed phosphate rock or phosphate rock powder, various types of binders and preparative ore methods have been developed, each with its own characteristics and advantages, but industrial by-products mainly containing silicon oxide are used as raw materials One or more of nickel salt, zirconium salt and potassium salt or alkali is used as a catalyst, caustic soda is used as a solvent to prepare a binder, crushed phosphate rock or phosphate rock powder is directly added with a disc machine without any treatment Ball forming, roasting and calcining production-type ore, used in the production of yellow phosphorus by electric furnace method has not been reported yet

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  • A preparation method of phosphate rock powder or crushed phosphate rock binder and a molded ore production method

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Effect test

Embodiment 1

[0028] The phosphate rock powder or crushed phosphate rock binder preparation method, its specific steps are as follows:

[0029] Step 1. NaOH liquid caustic soda or solid caustic soda is configured into a 100kg alkali solution with a NaOH content of 50wt%, which is converted into 38.75kg of sodium oxide;

[0030] Step 2. Heat the alkali solution obtained in step 1 to 70°C, then add the catalyst and stir evenly to form a well-dispersed colloidal substance; the catalyst is a mixture of zirconium carbonate and nickel sulfate with a mass ratio of 7:3, and the amount of the catalyst added is the alkali solution 0.5% of the mass of sodium oxide in the medium, that is, the amount of catalyst added is 0.19kg;

[0031] Step 3, add the colloidal substance obtained in step 2 to the industrial by-products containing silicon oxide and stir evenly to prepare phosphate rock powder or crushed phosphate rock binder, wherein the industrial by-products containing silicon oxide have a silicon ox...

Embodiment 2

[0037] The phosphate rock powder or crushed phosphate rock binder preparation method, its specific steps are as follows:

[0038] Step 1. NaOH liquid caustic soda or solid caustic soda is configured into 100kg of alkali solution with NaOH content of 40wt%, which is converted into 31kg of sodium oxide;

[0039] Step 2. Heat up the alkali solution obtained in step 1 to 80°C, then add the catalyst and stir evenly to form a well-dispersed colloidal substance; the catalyst is a mixture of potassium sulfate and nickel sulfate with a mass ratio of 5:5, and the amount of the catalyst added is the alkali solution 1% of the mass of sodium oxide in the medium, that is, the amount of catalyst added is 0.31kg;

[0040] Step 3. Add the colloidal substance obtained in step 2 to the industrial by-products containing silicon oxide and stir evenly to obtain phosphate rock powder or crushed phosphate rock binder, wherein the industrial by-products containing silicon oxide have a silicon oxide co...

Embodiment 3

[0046] The phosphate rock powder or crushed phosphate rock binder preparation method, its specific steps are as follows:

[0047] Step 1. NaOH liquid caustic soda or solid caustic soda is configured into a 100kg alkali solution with a NaOH content of 45wt%, which is converted into 34.9kg of sodium oxide;

[0048] Step 2. Heat up the alkali solution obtained in step 1 to 75°C, then add the catalyst and stir evenly to form a well-dispersed colloidal substance; the catalyst is a mixture of potassium sulfate and nickel sulfate with a mass ratio of 5:5, and the amount of the catalyst added is the alkali solution 0.8% of the mass of sodium oxide in the medium, that is, the amount of catalyst added is 0.28kg;

[0049] Step 3, adding the colloidal substance obtained in step 2 to the industrial by-products containing silicon oxide and stirring evenly to prepare phosphate rock powder or crushed phosphate rock binder, wherein the industrial by-products containing silicon oxide are 62.5wt...

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Abstract

The invention relates to a preparation method of phosphate rock powder or crushed phosphate rock binder and a molded ore production method, belonging to the technical field of comprehensive utilization of mineral resources. Using industrial by-products mainly containing silicon oxide as raw materials, adding caustic soda and catalysts to prepare phosphate rock powder or crushed phosphate rock binder; pelleting the binder with phosphate rock powder or crushed phosphate rock discs, and calcining it is an electric furnace The raw material for the production of French yellow phosphorus is ore. The method has the advantages of simple production process, mature equipment, low investment, convenient operation, high strength of molded ore, tail gas without any impurity removal treatment can be used as heat source, low cost, and at the same time can increase the reduction rate of phosphorus and reduce the residual phosphorus content in the slag , especially suitable for the characteristics of the future electric furnace yellow phosphorus production with washed ore as raw material.

Description

technical field [0001] The invention relates to a preparation method of phosphate rock powder or crushed phosphate rock binder and a molded ore production method, belonging to the technical field of comprehensive utilization of mineral resources. Background technique [0002] my country's phosphate rock resource reserves rank second in the world, but high-grade phosphate rock reserves are relatively low. For a long time, people have adopted the mining mode of "mining the rich and abandoning the poor". The grade of raw material phosphate rock, before the 1990s, the grade of phosphate rock produced by electric furnace yellow phosphorus was generally P 2 o 5 At about 32%, now, the grade of its incoming ore only needs to be controlled at P 2 o 5 About 28%, the same is true for the phosphate rock used in the production of high-concentration phosphate fertilizer. In order to reduce production costs and improve the utilization rate of phosphate rock resources, enterprises have t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/01
CPCC01B25/01
Inventor 夏举佩曹任飞
Owner KUNMING UNIV OF SCI & TECH
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