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Calcination method of high-purity quartz sand

A technology of high-purity quartz sand and quartz sand, which is applied in the field of purification of quartz sand, and can solve problems such as rising costs, waste of raw material usage, uneven heating of liquid quartz sand, etc.

Active Publication Date: 2017-02-15
XINYI JINGRUN QUARTZ MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the process of quartz production, quartz sand needs to be smelted at high temperature first, and a certain amount of quartz sand is poured into the smelting furnace for calcination. However, because the quartz sand used is not graded, the purity of the calcined quartz sand is not high, which wastes raw materials. In addition, during the calcination process, the furnace body maintains a certain posture, and the liquid quartz sand in the furnace is heated unevenly, which will also waste the utilization rate of raw materials and increase other costs

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  • Calcination method of high-purity quartz sand

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specific Embodiment 1

[0029] The invention consists of four parts: washing process, pickling process, drying process and calcining process.

[0030] Transfer 10 tons of quartz sand to the vibrating mesh belt through the belt conveyor, rinse it with running water, put it into the container for pickling, add 1.25 tons of aqua regia, stir for 2 hours during the 3 hours of soaking, and then let the quartz go Aqua regia on the surface of the sand; put the quartz sand into the baking chamber for baking for 3 hours at a temperature of 350°C; insert a graphite electrode rod with a diameter of 12cm and a length of 280cm in the melting furnace; 6 tons of ordinary quartz sand with a silicon content of 90%-99% is tightly wrapped around the graphite rod and put into the melting furnace, and 1 ton of ordinary quartz sand with a silicon dioxide content of 89%-98% is tightly wrapped in Ordinary quartz sand is put into the melting furnace, and 3 tons of low-grade quartz sand with a silica content of 88%-97% is tigh...

specific Embodiment 2

[0032] Transfer 8 tons of quartz sand to the vibrating mesh belt through the belt conveyor, wash it with running water, put it into the container for pickling, add 1 ton of aqua regia, stir for 1 hour during soaking for 2 hours, and then release the quartz Aqua regia on the surface of the sand; put the quartz sand into the baking chamber for baking for 2 hours at a temperature of 340°C; insert a graphite electrode rod with a diameter of 12cm and a length of 280cm in the melting furnace; 5 tons of ordinary quartz sand with a silicon content of 90%-99% is tightly wrapped around the graphite rod and put into the melting furnace, and 1 ton of ordinary quartz sand with a silicon dioxide content of 89%-98% is tightly wrapped in Put the ordinary quartz sand into the smelting furnace, wrap 2 tons of low-grade quartz sand with a silica content of 88%-97% tightly around the ordinary quartz sand, put it into the smelting furnace, and calcine it into high-purity quartz. Sand billet; calci...

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Abstract

A calcining method of highly pure quartz sand comprises the following steps: washing quartz sand with water, pickling, drying, adding the dried quartz sand to a furnace, calcining, flushing the quartz sand by using flow water to remove surface impurities, and immersing the quartz sand in aqua regia according to a certain ratio to acidify impurities in the quartz sand; drying graded quartz sand, putting the dried graded quartz sand in a smelting furnace according to a mode that the silica content of the quartz sand successively decreases from the innermost layer to the outermost layer, and calcining; carrying out certain angle overturning in the calcining process to uniformly heat liquid quartz sand; and collecting the waste heat of calcined quartz crystals, and transmitting the waste heat to a baking chamber in order to dry the pickled quartz sand. The method has the advantages of energy saving and environmental protection, so the work efficiency is improved.

Description

technical field [0001] The invention relates to a method for purifying quartz sand, in particular to a method for calcining and purifying high-purity quartz sand. Background technique [0002] In the process of quartz production, quartz sand needs to be smelted at high temperature first, and a certain amount of quartz sand is poured into the melting furnace for calcination. However, since the quartz sand used is not graded, the purity of the calcined quartz sand is not high, which wastes raw materials. In addition, during the calcination process, the furnace body maintains a certain posture, and the liquid quartz sand in the furnace is heated unevenly, which will also waste the utilization rate of raw materials and increase other costs. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for calcining high-purity quartz sand. The quartz sand prepared by the calcining method is of hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B1/00
Inventor 沈长青
Owner XINYI JINGRUN QUARTZ MATERIAL
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