Method for preparing microcrystalline jade plate by phosphorus slag

A technology of jade slabs and microcrystals, which is applied in the field of microcrystalline jade preparation, can solve the problems of phosphorus slag that does not meet the industrial policies and requirements of large quantities, low utilization rate of phosphorus slag, and secondary pollution of wastewater, so as to avoid heat energy loss, Effect of reducing pollution and softening luster

Inactive Publication Date: 2013-10-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the discharge of phosphorus slag is carried out by water quenching process, that is, the molten high-temperature phosphorus slag is water-quenched into phosphorus slag pellets. There are two disadvantages in this treatment method: (1) the phosphorus contained in the molten phosphorus slag A large amount of heat energy is wasted; (2) The water quenching process produces a large amount of corrosive hot steam, causing secondary pollution of wastewater
There is also a small amount of phosphorus slag used to prepare CaO-Al 2 o 3 -SiO 2 (CAS) system glass-ceramic raw materials, but CaO-Al 2 o 3 -SiO 2 The content of CaO in the glass-ceramics of the system is about 15%, and phosphorus slag is a waste residue with high CaO content (CaO>40%). If CAS glass-ceramics is prepared, the utilization rate of phosphorus slag in glass-ceramics is very high Low, generally only 30-40%
To sum up, the current utilization of phosphorus slag does not meet the industrial policy and requirements of comprehensive utilization of industrial waste slag in large quantities and with high added value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for preparing a microcrystalline jade plate from phosphorus slag, comprising the following steps:

[0027] (1) Ingredients

[0028] The various auxiliary materials of the additive and the flux clarifying agent are pulverized, then passed through a 40 mesh sieve, and the additives accounting for 25wt% of the total weight are weighed according to the composition ratio, and the flux clarifying agent accounting for 5wt% of the total weight, wherein the clarifying agent is NH 4 NO 3 and Na 2 SO 4 The composition of the mixture, the weight ratio between them is 2:1, the additive is Na 2 CO 3 , ZnO, MgO, SiO 2 and Al 2 o 3 The composition of the mixture, the weight ratio between them is 10:4:5:10:5, the additive and the clarifying agent are mixed to form a uniform auxiliary material batch.

[0029] (2) melting

[0030] Put the auxiliary material batch into the molten phosphorus slag accounting for 70wt% of the total weight, melt it at 1560°C for 4 hours to ma...

Embodiment 2

[0038] A method for preparing a microcrystalline jade plate from phosphorus slag, comprising the following steps:

[0039] (1) Ingredients

[0040] The various auxiliary materials of the additive and the flux clarifying agent are pulverized, then passed through a 40 mesh sieve, and the additives accounting for 25wt% of the total weight are weighed according to the composition ratio, and the flux clarifying agent accounting for 3wt% of the total weight, wherein the clarifying agent is NH 4 NO 3 、Na 2 SO 4 and CeO 2 A mixture of parts, the weight ratio between them is 4:1:1, the additive is Na 2 CO 3 , ZnO, MgO, SiO 2 and Al 2 o 3 The composition of the mixture, the weight ratio between them is 15:3:5:8:3, the additive and the clarifying agent are mixed to form a uniform auxiliary material batch.

[0041] (2) melting

[0042] Put the auxiliary material batch into the molten phosphorus slag accounting for 72wt% of the total weight, melt it at 1540°C for 4 hours to make ...

Embodiment 3

[0050] A method for preparing a microcrystalline jade plate from phosphorus slag, comprising the following steps:

[0051](1) Ingredients

[0052] The various auxiliary materials of the additive and the flux clarifying agent are pulverized, then passed through a 40 mesh sieve, and the additives accounting for 27wt% of the total weight are weighed according to the composition ratio, and the flux clarifying agent accounting for 5wt% of the total weight, wherein the clarifying agent is NH 4 NO 3 、Na 2 SO 4 and CeO 2 A mixture of parts, the weight ratio between them is 2:1:1, the additive is Na 2 CO 3 , ZnO, MgO, SiO 2 , CaF 2 and Al 2 o 3 The composition of the mixture, the weight ratio between them is 20:3:5:6:2:1, the additive is mixed with the clarifying agent to form a uniform auxiliary material batch,

[0053] (2) melting

[0054] Put the auxiliary material batch into the molten phosphorus slag accounting for 68wt% of the total weight, melt it at 1530°C for 4 hour...

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Abstract

The invention provides a method for preparing a microcrystalline jade plate by phosphorus slag, comprising the following steps: blending materials: mixing an addictive with a clarifying agent to form a uniform auxiliary mixed material; melting: adding the auxiliary mixed material to the molten phosphorus slag to obtain molten glass by melting, performing heat preservation, homogenizing and clarifying the molten glass to obtain molten high-temperature glass melt; molding: molding the high-temperature glass melt to obtain a formed base glass plate; crystallizing: transferring the formed glass plate to a crystallizing and annealing kiln for crystallizing and annealing; and finish machining: after the microcrystalline jade plate is delivered from the kiln, machining the glass plate to obtain a finished product of the microcrystalline jade plate. The microcrystalline jade plate obtained by the method has the advantages of wear resistance, corrosion resistance, high temperature resistance, no radiation, high utilization rate of the phosphorus slag, higher social benefit and higher economic benefit.

Description

technical field [0001] The invention relates to the technical field of preparation of microcrystalline jade, in particular to a method for preparing microcrystalline jade slabs by using phosphorus slag. Background technique [0002] Phosphorus slag is the industrial waste discharged during the production of yellow phosphorus by phosphate rock thermal method. For every 1 ton of yellow phosphorus produced, about 8-10 tons of phosphorus slag are produced. Based on my country's current yellow phosphorus production capacity, the annual discharge of phosphorus slag is more than 5 million tons, and it is increasing year by year. At present, the national discharge of phosphorus slag is about 6.8-8.5 million tons. Usually, the discharge of phosphorus slag is carried out by water quenching process, that is, the molten high-temperature phosphorus slag is water-quenched into phosphorus slag pellets. There are two disadvantages in this treatment method: (1) the phosphorus contained in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C6/10
Inventor 曹建尉张复实梁开明
Owner TSINGHUA UNIV
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