Industry news

Starting from the actual sequence of molybdenum plate rolling and cogging, this article discusses mill stiffness and shape control, hammer tonnage and striking method, and how heat treatment furnace temperature uniformity affects yield and microstructure. It sets out three checks to run before replacing equipment and a joint equipment-and-process acceptance approach, for shops evaluating equipment plans.

Drawing on molybdenum ore resources and smelting bases, the domestic molybdenum processing industry has gradually formed a regional cluster layout. From molybdenum powder and rods to molybdenum electrodes and refractory products, division of labor within the clusters keeps deepening, purchasing radius shortens, and the supply efficiency and cost advantages of domestically made molybdenum electrodes are increasingly evident.

In an electric melting furnace the electrode passes through the electrode block into the glass melt, and the selection of the surrounding refractories directly affects operating stability. This article discusses corrosion resistance, thermal expansion matching and installation clearance, explains how electrode block and port design influence melt flow and sealing, and lists the operating checks for leakage, sticking and block temperature for furnace design and maintenance reference.

The Paris Agreement took effect in 2016 and debate on the glass industry's low-carbon transition is heating up. Comparing electric melting furnaces with gas-fired furnaces across thermal efficiency, direct emissions and energy mix shows that electrification of the melting step is clearly the trend, and molybdenum electrodes are the key material on that path.

Molybdenum electrodes are generally produced by powder metallurgy. Following powder preparation, pressing, pre-sintering, high-temperature sintering, forging, and machining, this article explains what particle size distribution, oxygen content, pressing pressure, sintering curves, and deformation each control, and gives reference ranges for density, carbon and oxygen content, grain structure, and testing, so buyers can judge performance differences among electrodes of the same specification.

Energy-saving and quality requirements are driving the ceramic fiber industry's melting stage from flame tank furnaces toward electric melting furnaces. Electric melting furnaces produce no combustion flue gas, hold furnace temperature precisely and keep iron content in the melt low, which suits the uniformity demanded by the spinning process, and the matched molybdenum electrodes have built a steady, continuous purchasing demand.

Energy price ratios, carbon constraints and furnace technology are together reshaping the energy mix of the glass industry. This article follows those three threads to trace the rise in electrification, uses a worked calculation to show how electrode load, electrode count and diameter interact, sets out the density, purity and straightness metrics to watch at procurement, and discusses how peak-valley tariffs, maintenance capability and retrofit pacing should line up.

Since 2015, molybdenum raw material prices have remained at multi-year lows, lowering the production cost of molybdenum electrodes, yet downstream glass producers have not seen matching price cuts. With the raw material share falling and the value of processing and quality control rising, the industry's cost and quality logic is being reshaped, and procurement evaluation systems are adjusting accordingly.

Starting from the drop in strength that pure molybdenum shows after recrystallization, this article explains the compositional design logic of TZM alloy and the difficulty of carbon control, analyses how well it suits hot-pressing dies, high-temperature furnace parts and electrode connectors, and sets out the practical constraints in machining, welding and trial scale-up for reference when selecting materials for structural parts.

Level fluctuation and electrode power are usually discussed separately, yet the two constrain each other. Looking at power adjustment, level control and observation sequence, this article explains how to identify the source of fluctuation and cut the losses caused by ineffective adjustment.

Sichuan hosts glass fiber tank furnaces, electronic glass and solar furnaces side by side, so electrode consumption is structurally diverse. This article maps the product mix and the cluster roles of Chengdu, Zigong and Guang'an, analyzes how power swings under seasonal wet-dry pricing affect electrode life, and sets out selection specifications, a reference cost structure, logistics times and stocking rhythm.

The revised Environmental Protection Law took effect on January 1, 2015, raising environmental thresholds across molybdenum smelting and processing. Roasting off-gas desulfurization, ammonia-nitrogen wastewater treatment and dust control were upgraded together, and the batch stability of electrode-grade molybdenum powder improved accordingly, providing an upstream basis for better molybdenum electrode quality.

This article examines the service conditions of molybdenum plate in vacuum furnaces, reduction furnaces and heat shields, covering atmosphere and temperature limits, plate thickness selection, joint design and the contamination risk posed by surface condition. It also sets out shutdown inspection items and a basis for judging replacement intervals for lining material selection and on-site maintenance.

With assessment of the 12th Five-Year Plan energy intensity reduction target approaching and tighter emission constraints across regions, energy-saving retrofits of glass furnaces are clearly speeding up. All-electric furnaces offer high thermal efficiency and low emissions and are spreading from specialty glass to general glass grades; molybdenum electrodes, the core heating component of electric melting furnaces, see demand rising along with the retrofit pace.

Starting from the demand for high-temperature metal components in crystal growth, ion implantation and thin-film deposition, this article analyzes the thresholds tungsten and molybdenum materials must meet in purity, cleanliness and machining accuracy, and sets out the four-step qualification flow from material level to equipment level and how it affects supply timing for component suppliers planning their qualification schedule.

China's E-glass fiberglass capacity already ranks among the world's largest, and single-line furnace scale keeps growing. Deeper glass bath and higher electric boosting power have changed the service environment for molybdenum electrodes, and large-diameter long electrodes, densification processes and scientific arrangement have become key supports for stable operation of large furnaces.

This article looks at progress in additive manufacturing of tungsten, molybdenum and their alloys for small batches of complex parts, analyzes how powder quality, build defects, heat treatment and post-machining affect the outcome, and uses a comparison to show which applications are worth trying and which should still use conventional processes for process route selection.

Power distribution calculation starts from melt conductivity and tank geometry: current density and section give the current per electrode, from which the inter-electrode voltage and total power follow, and the power is then split among tank zones according to the heat load of melting and refining. This article sets out the calculation chain with worked steps and explains how to verify and adjust it.

Molybdenum electrodes have low expansion and high thermal conductivity, a sound basis for thermal shock resistance, but room-temperature brittleness, grinding defects and high-temperature oxidation grooves remain weak points. This article analyzes the damage mechanism and typical scenarios and sets out checklists and acceptance criteria for heat-up and cool-down curves, protective atmospheres, structural design and reheating after shutdown.

YS/T 1312-2019 is the nonferrous metals industry standard governing molybdenum electrode products, covering rod and plate electrodes formed by powder metallurgy billets followed by plastic working and machining. This article interprets it across five levels: scope, size ranges, composition and density, inspection rules, and how to draft a technical agreement, and offers recommendations for incoming acceptance and common misreadings.

This article explains how molybdenum-copper composites are used for heat dissipation in power devices and electronic packaging, discussing the effect of the molybdenum-to-copper ratio on thermal expansion and conductivity, interface bonding processes, forming and plating, and lists the inspection items that should be completed during first qualification for packaging thermal design evaluation.

When lengthening or extending molybdenum electrodes, threaded connections and gas tungsten arc welding, plasma welding and electron beam welding each have their limits. This article compares the three welding processes with threaded solutions, covering engagement length, preload torque, galling prevention, welding heat input, atmosphere protection, joint inspection and the decision steps for selecting a method to suit the duty.

Forging ratio determines whether residual porosity in the sintered billet can be welded shut and whether columnar porosity can be broken up. Too little deformation leaves both density and toughness low, while too much raises equipment cost and introduces anisotropy. This article explains the mechanism by which forging ratio affects density and gives engineering experience on coordinated control of temperature and deformation.

Guangdong's industrial electricity price is about 0.60 yuan/kWh and its glass product mix skews premium, with electrode consumption concentrated in multi-variety small furnaces. The article explains how high electricity prices narrow the all-electric melting route, how power fluctuations with tariff periods affect service life, and the selection and pre-positioned inventory requirements created by panel color difference and container glass changeovers.