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CN-122010411-A - Amber glass suitable for oxy-fuel combustion melting furnace and preparation method thereof

CN122010411ACN 122010411 ACN122010411 ACN 122010411ACN-122010411-A

Abstract

The invention discloses amber glass suitable for a oxy-fuel combustion melting furnace and a preparation method thereof, and belongs to the technical field of glass manufacturing. The raw materials of the glass comprise SiO 2 、Al 2 O 3 、CaO、MgO、Na 2 O、K 2 O and a composite colorant. The composite coloring agent consists of ferrosilicon powder, coated carbon microspheres and zinc sulfide, and can construct a reduction micro-area in the glass liquid, effectively resist the full-oxygen strong oxidation atmosphere and realize stable sulfur-carbon coloring. The preparation method comprises the steps of batching mixing, melting, clarifying homogenizing, forming annealing and the like, wherein the melting is carried out in a full oxygen combustion melting furnace with an isolation protection layer, the protection layer is a porous ceramic cover plate composite inert ceramic ball, and the atmosphere can be isolated and the local reduction environment can be maintained. The invention solves the contradiction between the full oxygen combustion technology and the sulfur-carbon coloring technology, and realizes the amber glass production with deep color, less bubbles and stable quality.

Inventors

  • CAO XIN
  • TENG FEI
  • WANG PINGPING
  • PENG SHOU
  • LI CHANGQING
  • SHI LIFEN
  • GAO QIANG
  • YANG YONG
  • HU WENTAO
  • ZHOU GANG
  • WANG PENG
  • ZHANG XIAOYU

Assignees

  • 中建材玻璃新材料研究院集团有限公司

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. The amber glass suitable for the oxy-fuel combustion melting furnace is characterized by being prepared from ：70-76%SiO 2 ,0.5-3%Al 2 O 3 ,8-13%CaO,1-4%MgO,10-16%Na 2 O,0-2%K 2 O, mass percent of raw materials and the balance of composite coloring agent, wherein the mass percent of CaO and MgO is 10-12% of the total mass, and the mass percent of Na 2 O+K 2 O is 10-14% of the total mass.
  2. 2. The amber glass suitable for oxy-fuel combustion melting furnace according to claim 1, wherein the composite colorant consists of ferrosilicon powder, coated carbon microspheres and zinc sulfide in a mass ratio of (0.1-0.5): (0.1-0.3): (0.2-1.0).
  3. 3. An amber glass suitable for use in a oxy-fuel combustion furnace according to claim 2 wherein the Si content of the ferrosilicon powder is 15-30% by weight and the particle size is 200-800 mesh.
  4. 4. The amber glass suitable for a oxy-fuel combustion melting furnace according to claim 2, wherein the coated carbon microsphere is prepared by coating inorganic sol on the surface of superfine carbon powder through a spray granulation process, and densifying the coating layer through high-temperature heat treatment at 600-900 ℃ in a protective atmosphere of nitrogen or argon.
  5. 5. The amber glass suitable for oxy-fuel combustion melting furnaces according to claim 2, wherein the particle diameter D50 of the coated carbon microspheres is 20-100 μm, the coating layer is SiO 2 , the mass ratio of the coating layer is 10-40%, and the granularity of the superfine carbon powder is 1-10 μm.
  6. 6. A method for preparing amber glass suitable for use in a oxy-fuel furnace for preparing an amber glass suitable for use in a oxy-fuel furnace according to any of claims 1-5, comprising the steps of: s1, weighing raw materials and fully and uniformly mixing to obtain a batch; s2, putting the batch obtained in the step S1 into a full-oxygen combustion melting furnace with an atmosphere isolation function, and melting to obtain glass liquid; And S3, clarifying and homogenizing the glass liquid obtained in the step S2, conveying to forming equipment, and performing forming and annealing treatment to finally obtain amber glass suitable for the oxy-fuel combustion melting furnace.
  7. 7. The method for producing amber glass for a oxy-fuel combustion furnace according to claim 6 wherein the melting temperature is 1560-1620 ℃.
  8. 8. The method for producing amber glass for a oxy-fuel combustion furnace according to claim 6 wherein the clarifying temperature is 1500-1560 ℃ and the homogenizing temperature is 1420-1470 ℃.
  9. 9. The method for preparing amber glass suitable for oxy-fuel combustion melting furnace according to claim 6, wherein the interior of the furnace of the oxy-fuel combustion melting furnace with atmosphere isolation function is sequentially provided with a melting zone, a weir and a clarification homogenization zone from front to back, the top of the furnace is provided with an oxy-fuel combustion spray gun, and an isolation protection layer is arranged above the glass liquid surface in the kiln cavity space of the melting zone.
  10. 10. The method for preparing amber glass suitable for oxy-fuel combustion melting furnace according to claim 9, wherein the insulating protective layer is a porous ceramic cover plate, a plurality of small holes are formed on the cover plate, and hollow or solid inert ceramic balls are contained in the holes.

Description

Amber glass suitable for oxy-fuel combustion melting furnace and preparation method thereof Technical Field The invention belongs to the technical field of glass manufacturing, and particularly relates to a preparation method of amber glass suitable for a oxy-fuel combustion melting furnace. Background Sulfur-carbon tinting is a common amber glass tinting technique that produces a light to dark brown amber color by adding reducing agents such as sulfur powder and carbon powder to the glass batch to form sulfides (e.g., feS, na 2 S) and polysulfides (e.g., na 2Sx) during the melting process, which interact with the iron ions in the glass. The coloring process needs to be performed under a reducing atmosphere or a weakly oxidizing atmosphere. However, with the increasing environmental protection requirements, the oxy-fuel combustion technology is widely applied and popularized in glass melting furnaces. The technology obviously improves the heat efficiency by using pure oxygen to replace air for supporting combustion, reduces the emission of harmful gases such as nitrogen oxides and the like, and becomes an important direction of green transformation in the glass industry. However, the kiln atmosphere of the total oxygen combustion technology is strong oxidizing atmosphere, which is contradictory with the reducing or weak oxidizing environment required by the sulfur-carbon coloring technology, and brings serious challenges to the production of high-quality amber glass. Under the condition of full oxygen combustion, if the traditional coloring systems such as iron oxide red, carbon powder and mirabilite are directly used, the carbon powder serving as a reducing agent is burnt in a large amount before the carbon powder does not participate in effective coloring reaction, and generated ferrous ions are easily oxidized into ferric iron again, so that coloring centers are difficult to form stably, and finally, the glass is light in color and cannot reach the required color depth. Meanwhile, unconsumed residual carbon powder and sulfate can undergo severe side reaction in a clarification stage to generate a large amount of carbon dioxide, sulfur dioxide and other gases, so that bubbles and gray bubbles which are difficult to remove are formed, the light transmittance and the appearance quality of the glass are seriously affected, and the qualification rate of finished products is greatly reduced. At present, in order to solve the contradiction, a mode of greatly increasing the dosage of carbon powder and sulfur powder is adopted in the industry to try to make up for oxidation loss, or avoid the full oxygen combustion technology, and the traditional air combustion-supporting kiln is adopted. However, the former has low raw material utilization rate and high cost, and is easy to aggravate bubble defects and environmental protection pressure, while the latter cannot exert the energy-saving and environmental protection advantages of full-oxygen combustion, and is contrary to the development trend of clean production in industry. Therefore, how to make full use of the advantages of the oxy-fuel combustion technology and effectively and stably realize sulfur-carbon coloring, and prepare high-quality amber glass with deep color and few bubbles becomes a key technical problem to be broken through in the field. Disclosure of Invention The invention aims to overcome the defects of the prior art, provides amber glass suitable for a oxy-fuel combustion melting furnace and a preparation method thereof, and the invention provides a glass with a novel glass structure, A stable reaction space suitable for sulfur-carbon coloring is successfully constructed in the oxy-fuel combustion melting furnace, so that high-quality amber glass with deep color and few bubbles is efficiently and stably produced. The aim of the invention can be achieved by the following technical scheme: an amber glass suitable for a oxy-fuel combustion melting furnace is prepared from the following raw materials in percentage by mass, ：70-76%SiO2,0.5-3%Al2O3,8-13%CaO,1-4%MgO,10-16%Na2O,0-2%K2O, and the balance of composite coloring agent. Preferably, the mass percentage of CaO and MgO is 10-12% of the total. Preferably, the mass percentage of Na 2O+K2 O accounts for 10-14% of the total mass. Preferably, the composite coloring agent consists of ferrosilicon powder (FeSi), coated carbon microspheres and zinc sulfide (ZnS) according to the mass ratio of (0.1-0.5) (0.1-0.3) (0.2-1.0). Preferably, the weight content of Si in the ferrosilicon powder is 15-30%, and the granularity is 200-800 meshes. Preferably, the coated carbon microsphere is prepared by coating inorganic sol on the surface of superfine carbon powder through a spray granulation process, and densifying a coating layer through high-temperature heat treatment at 600-900 ℃ in a protective atmosphere of nitrogen or argon to obtain the coated carbon microsphere. Preferably, the inorganic sol is two or more