Hunan Jinwang Bismuth Industry Co., Ltd. 30kg Silver Ingot Casting Machine

Production Capacity	More than 2000kg/8 hours
Qualification Rate	Not less than 92% when the weight error of a single ingot is within ±1kg; more than 95% when the weight error of a single ingot is within ±2kg
Silver Ingot Weight	30kg per ingot
Silver Ingot Quality	Meets LBMA standard requirements (in particular, no air holes or inclusions in appearance)

I. Core Function: Precise Casting of 30kg Standard Silver Ingots

As an automated device designed specifically for precious metal processing scenarios, the core function of the 30kg Silver Ingot Casting Machine focuses on "efficient casting of standardized 30kg silver ingots". It can directly pour the molten silver liquid into 30kg silver ingots with precise weight through an automated temperature - control and shaping process. There is no need for subsequent manual cutting or weight - adjustment.

Whether it is the ingot - casting after primary ore refining in silver mines, the recycled silver processing in precious metal recycling enterprises, or the mass production of silver ingots in jewelry raw material factories, this equipment can meet the production requirements of "fixed - weight silver ingots", especially suitable for scenarios that need to meet industry circulation standards (such as silver ingot storage, transportation, or downstream processing). It avoids process interruptions caused by inconsistent silver ingot weights.

II. Key Performance: High Productivity, High Qualification Rate, High Compliance

1. Production Capacity: Exceeding 2000kg in 8 hours to meet mass - production demands

The production efficiency of the 30kg Silver Ingot Casting Machine far exceeds that of traditional semi - automatic equipment. It can complete the casting of more than 2000kg of silver ingots every 8 hours (calculated as 30kg per ingot, about 67 ingots can be produced every 8 hours). This means that the single - shift production capacity can cover the normal order volume of small and medium - sized silver processing enterprises for 1 - 2 days.

Compared with manual casting (at most 2 - 3 ingots can be produced per hour, and the temperature of the silver liquid needs to be monitored frequently), this equipment reduces the manual intervention time by more than 90% through a process design of "one - key start + automatic feeding + continuous shaping". At the same time, it avoids production capacity fluctuations caused by manual operation fatigue. It is especially suitable for scenarios where large orders need to be delivered intensively, helping enterprises shorten the production cycle and improve the capital turnover efficiency.

2. Qualification Rate: Error strictly controlled within ±2kg, with a qualification rate of over 95%

The equipment adopts the "two - stage temperature control + dynamic weight monitoring" technology to ensure that the weight accuracy of silver ingots is at the leading level in the industry:

Within an error range of ±1kg, the qualification rate of silver ingots is ≥92% - that is, among every 100 ingots, at least 92 ingots have an actual weight deviation from the 30kg standard value of no more than 1kg, which can directly meet the scenarios with extremely high requirements for weight accuracy (such as precious metal trading, high - purity silver raw material supply).
Within an error range of ±2kg, the qualification rate of silver ingots is ≥95% - even in the face of slight fluctuations in the purity of the silver liquid, the weight deviation can still be controlled within 2kg through the equipment's automatic feeding / temperature - control function without subsequent manual correction, greatly reducing the scrap rate (the qualification rate of traditional equipment is usually only 80% - 85%).

3. Compliance: Meeting LBMA standards, no pores, no inclusions

As a precious metal processing equipment, the silver ingots produced by the 30kg Silver Ingot Casting Machine fully meet the LBMA (London Bullion Market Association) standards - which is a core compliance requirement in the global precious metal circulation field. This means that the silver ingots cast by the equipment:

Have no obvious pores or cracks on the surface, and no metal inclusions or impurity particles inside, and can directly pass the appearance and composition inspection of LBMA - certified institutions.
The silver ingots have a uniform density (because the equipment uses the "slow - cooling and shaping" technology to avoid the internal structure loosening caused by the rapid cooling of the silver liquid), and are not easy to break during subsequent cutting and forging, and are suitable for a variety of downstream processing scenarios (such as rolling into silver plates, drawing into silver wires).

For enterprises that need to sell silver ingots to the international market or connect with large precious metal exchanges, this compliance can directly save additional inspection and rework costs, and accelerate the circulation and realization of silver ingots.

III. Technical Support behind the Performance (Enhancing User Trust)

The above - mentioned performance advantages are not just a simple pile of parameters, but are based on the three core technologies of the equipment:

Intelligent Temperature Control System: Adopting PID constant - temperature control technology, the temperature of the silver liquid during the casting process is stabilized at 1050℃ - 1100℃ (the optimal casting temperature range for silver), avoiding silver liquid volatilization caused by excessive temperature or incomplete shaping caused by too low temperature.
Real - time Weight Monitoring Module: A high - precision pressure sensor is built into the bottom of the casting mold to provide real - time feedback on the weight of the silver liquid. When it approaches the 30kg standard value, the feeding speed is automatically reduced to precisely control the final weight.
Vacuum Degassing Device: Before casting, the silver liquid is subjected to vacuum degassing treatment to remove air impurities in the silver liquid, avoiding the appearance of pores in the silver ingots from the source. This is also one of the key technologies to meet the LBMA standards.

Frequently Asked Questions (FAQ)

1. What is LBMA, and how does it relate to 30kg silver ingot casting?

LBMA (London Bullion Market Association) is the world’s most authoritative self-regulatory organization for the precious metals market. It establishes quality standards, trading rules, and logistics specifications for precious metals (including silver), and its “Good Delivery” standard is the core benchmark for global precious metals trading.
The 30kg silver ingot is one of the mainstream specifications for LBMA “Good Delivery” silver ingots. If the 30kg silver ingots produced are to circulate in major international precious metals markets (e.g., London, New York), they must meet LBMA’s requirements for purity (minimum 99.9% pure silver), weight tolerance (usually ±0.5%), and appearance (no obvious defects, clear markings). Therefore, the production parameters of this casting machine are designed around LBMA standards.

2. How to apply for LBMA certification for 30kg silver ingots produced by this casting machine?

To apply for LBMA “Good Delivery” certification, the following steps are required, with the core being to prove that the silver ingot quality and production process meet the standards:

Enterprise Qualification Preparation: The casting enterprise must first become an LBMA “Member” or “Associate Member” and submit corporate compliance documents (e.g., production licenses, quality management system certifications);
Sample Testing: Randomly select 30kg silver ingot samples and send them to third-party laboratories accredited by LBMA (e.g., SGS, Bureau Veritas) for testing of purity and impurity content (e.g., lead and copper content must be below LBMA limits);
Production Process Audit: LBMA or its authorized institutions will audit the casting machine’s production processes (e.g., smelting temperature control, casting accuracy) and quality control procedures (e.g., weight re-inspection of each ingot, marking printing specifications);
Certification Approval: After passing the audit, this specification of silver ingot will be included in the LBMA “Good Delivery” list and can circulate in compliant global precious metals markets.

3. If LBMA certification is not pursued, can the 30kg silver ingots produced by this machine be used in other scenarios?

Yes. LBMA certification is mainly required for scenarios such as international precious metals investment, interbank transactions, and large-scale industrial procurement (e.g., high-purity silver demand in the electronics and photovoltaic industries). If the silver ingots are used in the following scenarios, LBMA certification is not mandatory:

Domestic regional precious metals trading (e.g., small-scale jewelry processing, handicraft production);
In-house silver material recycling and recasting by enterprises (e.g., recasting after purification of silver scrap in electronics factories);
Industrial applications with no high-purity requirements (e.g., silver additives in the production of certain alloys).
However, it should be noted that non-LBMA certified silver ingots have limited circulation scope and market recognition, and their prices are usually lower than those that meet LBMA standards.

4. During production, which parameters of this casting machine directly affect whether the silver ingots meet LBMA standards?

Core parameters must be strictly controlled; otherwise, the silver ingots may fail to meet LBMA requirements:

Purity Control: The “impurity removal temperature” during smelting (usually 1100-1200°C to ensure impurity volatilization) and the “raw material purity threshold” (crude silver raw materials with a purity of over 99.9% must be used to avoid impurity accumulation);
Weight Accuracy: The “casting volume control error” of the casting machine must be ≤ ±0.2% (LBMA requires the actual weight of 30kg silver ingots to be between 29.75kg and 30.25kg), which relies on the machine’s load cells and automatic pouring system;
Appearance and Markings: The “surface smoothness” of the casting mold (to avoid dents and bubbles on the silver ingot surface) and the “clarity of marking printing” (in accordance with LBMA requirements, the enterprise name, silver ingot serial number, purity, weight, and production date must be printed with clear and legible fonts).

5. What are LBMA’s specific requirements for the markings on 30kg silver ingots? What are the impacts if the marking function of the casting machine is substandard?

LBMA has mandatory specifications for silver ingot markings to ensure traceability of silver ingots. The specific requirements include:

Mandatory Information to Print: Casting enterprise name (or enterprise logo accredited by LBMA), unique silver ingot serial number (e.g., “ZXSZ-20240903-001”), purity (e.g., “99.95% Ag”), actual weight (e.g., “30.02kg”), and production date;
Marking Position: Must be printed on the “front or side” of the silver ingot and remain permanently clear (usually using laser engraving or steel mold stamping to prevent unrecognizability after wear).
If the marking function of the casting machine is substandard (e.g., blurred markings, missing information), even if the silver ingot purity is qualified, it cannot pass LBMA certification and may be rejected by downstream buyers. This is because markings are the core of silver ingot traceability; missing or unclear markings increase the risk of counterfeiting and fail to meet compliance requirements in the global precious metals market.

Address: No. 173 Xiangjiang Avenue, Development Zone, Zhanggong District, Ganzhou City, Jiangxi Province, China

Phone/WhatsApp: +86 199 5432 2149

Email: zxszchina@gmail.com

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